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How We Ranked Tap Water in the 100 Largest US Cities: Methodology (2026)

TapWaterData Editorial

This page sets out how the 2026 ranking was built, in the order the work was done. Every input, parameter, system and sensitivity result below is read from the study's published data for edition 2026 (dataset 2026.1).

2026 edition (dataset version 2026.1). Data cutoff . Last checked . Changelog

  • EPA violations: to .
  • Lead test results: to .
  • PFAS tests (EPA UCMR 5): to .
  • Annual water quality reports: to .

How the score works

  • We score each city's main water system on four areas, weighted lead 30, PFAS 25, other regulated contaminants 25 and EPA compliance history 20.
  • The data: EPA lead test results, lead service-line inventories, EPA PFAS tests, utilities' annual water quality reports and EPA compliance records, with data to 2026-10-20.
  • We registered the formula and weights before the first scoring run on real data. Every rule we changed or set after that run is listed on this page.
  • We re-ran the ranking 10,000 times with the weights varied, which gives each city a likely rank range.
  • The score compares water systems with each other. It is not a safety certificate, and it does not cover taste, hardness or fluoride.

Inputs and sources by scored area

Each pillar is scored from the inputs below. A data window is the period of records an input covers in this edition; the data cutoff is 2026-10-20.

Lead, weight 30

InputData window
Lead 90th-percentile results (EPA)2016-01-01 to 2026-10-20
Lead service-line inventoriesNo data window is registered for this input.
Sources cited for this pillar (92)
  • MOA MUNICIPALITY OF ANCHORAGE. Service line inventory.
  • HUNTSVILLE UTILITIES WATER DEPT.. Service line inventory.
  • CHANDLER CITY OF. Service line inventory.
  • GILBERT, TOWN OF. Service line inventory.
  • GLENDALE CITY OF. Service line inventory.
  • MESA CITY OF. Service line inventory.
  • PHOENIX CITY OF. Service line inventory.
  • SCOTTSDALE CITY OF. Service line inventory.
  • TUCSON CITY OF. Service line inventory.
  • California State Water Resources Control Board (2026). Statewide service line inventory, line-level file SrvLineCA01hruCA18.csv (data files last updated April 21, 2026).
  • California State Water Resources Control Board (2026). Statewide service line inventory, line-level file SrvLineCA19.csv (data files last updated April 21, 2026).
  • California State Water Resources Control Board (2026). Statewide service line inventory, line-level file SrvLineCA20thruCA33.csv (data files last updated April 21, 2026).
  • California State Water Resources Control Board (2026). Statewide service line inventory, line-level file SrvLineCA34thruCA38.csv (data files last updated April 21, 2026).
  • California State Water Resources Control Board (2026). Statewide service line inventory, line-level file SrvLineCA39thruCA58.csv (data files last updated April 21, 2026).
  • AURORA CITY OF. Service line inventory.
  • COLORADO SPRINGS UTILITIES. Service line inventory.
  • DENVER WATER BOARD. Service line inventory.
  • D.C. WATER AND SEWER AUTHORITY. Service line inventory.
  • Electronic Code of Federal Regulations, Title 40, Part 141 (National Primary Drinking Water Regulations), up to date as of October 15, 2026.
  • U.S. EPA (2025). 2025 updated service line projections (7th Drinking Water Infrastructure Needs Survey and Assessment), state table, September 2025.
  • U.S. EPA ECHO (2026). SDWA data downloads (SDWA_latest_downloads.zip), build of October 13, 2026.
  • CAPE CORAL, CITY OF. Service line inventory.
  • JEA. Rendered service line inventory dashboard.
  • MDWASA - MAIN SYSTEM. Service line inventory.
  • ORLANDO UTILITIES COMMISSION. Service line inventory.
  • PORT ST LUCIE UTILITIES. Service line inventory.
  • ST PETERSBURG, CITY OF. Service line inventory.
  • CITY OF TAMPA WATER DEPARTMENT. Service line inventory.
  • ATLANTA. Service line inventory.
  • HNL-WINDWARD-PEARL HARBOR. Consumer Confidence Report (2025 data).
  • HNL-WINDWARD-PEARL HARBOR. Service line inventory.
  • Illinois EPA. Service Line Material Inventory: Chicago IL0316000, 2024 report details (GRR).
  • CHICAGO. Service line inventory.
  • FORT WAYNE - 3 RIVERS FILTRATION PLANT. Service line inventory.
  • CITIZENS WATER - INDIANAPOLIS. Service line inventory.
  • WICHITA, CITY OF. Service line inventory.
  • KENTUCKY-AMERICAN WATER CO. Service line inventory.
  • LOUISVILLE WATER COMPANY. Service line inventory.
  • NEW ORLEANS CARROLLTON WATER WORKS. Service line inventory.
  • BOSTON WATER AND SEWER COMMISSION (MWRA). Service line inventory.
  • CITY OF BALTIMORE. Service line inventory.
  • DETROIT CITY OF. Service line inventory.
  • Minneapolis. Service line inventory.
  • Saint Paul Regional Water Services. Service line inventory.
  • KANSAS CITY PWS. Service line inventory.
  • ST LOUIS CITY PWS. Service line inventory.
  • DURHAM, CITY OF. Service line inventory.
  • GREENSBORO, CITY OF. Service line inventory.
  • RALEIGH, CITY OF. Service line inventory.
  • WINSTON-SALEM, CITY OF. Service line inventory.
  • LINCOLN, CITY OF. Service line inventory.
  • METROPOLITAN UTILITIES DISTRICT. Service line inventory.
  • JERSEY CITY MUA. Service line inventory.
  • NEWARK WATER DEPARTMENT. Service line inventory.
  • ALBUQUERQUE WATER SYSTEM. Service line inventory.
  • HENDERSON CITY OF. Service line inventory.
  • LAS VEGAS VALLEY WATER DISTRICT. Service line inventory.
  • TRUCKEE MEADOWS WATER AUTHORITY. Service line inventory.
  • BUFFALO WATER AUTHORITY. Service line inventory.
  • NEW YORK CITY SYSTEM. Service line inventory.
  • CINCINNATI PUBLIC WATER SYSTEM. Service line inventory.
  • CLEVELAND PUBLIC WATER SYSTEM. Service line inventory.
  • COLUMBUS PUBLIC WATER SYSTEM. Service line inventory.
  • TOLEDO CITY OF. Service line inventory.
  • OKLAHOMA CITY. Service line inventory.
  • TULSA. Service line inventory.
  • PORTLAND WATER BUREAU. Service line inventory.
  • PHILADELPHIA WATER DEPARTMENT. Service line inventory.
  • PITTSBURGH WATER & SEWER AUTH. Service line inventory.
  • MEMPHIS LIGHT, GAS, & WATER. Service line inventory.
  • METRO WATER SERVICES. Service line inventory.
  • Arlington Water Utilities. Service line inventory response (email, 2026-10-14).
  • CITY OF AUSTIN WATER & WASTEWASTEWATER. Service line inventory.
  • CITY OF CORPUS CHRISTI. Service line inventory.
  • DALLAS WATER UTILITY. Service line inventory.
  • EL PASO WATER UTILITIES. Service line inventory.
  • CITY OF FORT WORTH. Service line inventory.
  • CITY OF FRISCO. Service line inventory.
  • City of Garland. Service line inventory response (public-records-request, 2026-10-14).
  • CITY OF HOUSTON. Service line inventory.
  • City of Irving Water Utilities. Service line inventory response (email, 2026-10-13).
  • CITY OF LAREDO. Service line inventory.
  • LUBBOCK PUBLIC WATER SYSTEM. Service line inventory.
  • CITY OF MCKINNEY. Service line inventory.
  • CITY OF PLANO. Service line inventory.
  • SAN ANTONIO WATER SYSTEM. Service line inventory.
  • CITY OF CHESAPEAKE - NORTHWEST RIVER SYS. Service line inventory.
  • RICHMOND, CITY OF. Service line inventory.
  • VIRGINIA BEACH, CITY OF. Service line inventory.
  • Seattle Public Utilities. Service line inventory response (email, 2026-10-13).
  • MADISON WATER UTILITY. Service line inventory.
  • MILWAUKEE WATERWORKS. Service line inventory.

PFAS, weight 25

InputData window
UCMR 5 PFAS monitoring (EPA)2023-01-03 to 2026-06-16
Sources cited for this pillar (3)
  • Electronic Code of Federal Regulations, Title 40, Part 141 (National Primary Drinking Water Regulations), up to date as of October 15, 2026.
  • U.S. EPA (2026). Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) occurrence data by state, release of August 27, 2026.
  • U.S. EPA (2024). PFAS National Primary Drinking Water Regulation. Final rule. Federal Register 89 FR 32532 (April 26, 2024); FR Doc. 2024-07773; 40 CFR parts 141 and 142.

Other regulated contaminants, weight 25

InputData window
Consumer Confidence Report results2001-01-01 to 2025-12-31
Sources cited for this pillar (101)
  • MOA MUNICIPALITY OF ANCHORAGE. Consumer Confidence Report (2025 data).
  • HUNTSVILLE UTILITIES WATER DEPT.. Consumer Confidence Report (2025 data).
  • CHANDLER CITY OF. Consumer Confidence Report (2025 data).
  • GILBERT, TOWN OF. Consumer Confidence Report (2025 data).
  • GLENDALE CITY OF. Consumer Confidence Report (2025 data).
  • MESA CITY OF. Consumer Confidence Report (2025 data).
  • PHOENIX CITY OF. Consumer Confidence Report (2025 data).
  • SCOTTSDALE CITY OF. Consumer Confidence Report (2025 data).
  • TUCSON CITY OF. Consumer Confidence Report (2025 data).
  • CITY OF ANAHEIM. Consumer Confidence Report (2025 data).
  • CWS - BAKERSFIELD. Consumer Confidence Report (2025 data).
  • OTAY WATER DISTRICT. Consumer Confidence Report (2025 data).
  • CITY OF FRESNO. Consumer Confidence Report (2025 data).
  • IRVINE RANCH WATER DISTRICT. Consumer Confidence Report (2025 data).
  • LONG BEACH UTILITIES DEPARTMENT. Consumer Confidence Report (2025 data).
  • LOS ANGELES-CITY, DEPT. OF WATER & POWER. Consumer Confidence Report (2025 data).
  • EAST BAY MUD. Consumer Confidence Report (2025 data).
  • RIVERSIDE, CITY OF. Consumer Confidence Report (2025 data).
  • CITY OF SACRAMENTO MAIN. Consumer Confidence Report (2025 data).
  • SAN DIEGO, CITY OF. Consumer Confidence Report (2025 data).
  • SFPUC CITY DISTRIBUTION DIVISION. Consumer Confidence Report (2025 data).
  • SAN JOSE WATER. Consumer Confidence Report (2025 data).
  • CITY OF SANTA ANA. Consumer Confidence Report (2025 data).
  • CITY OF STOCKTON. Consumer Confidence Report (2025 data).
  • AURORA CITY OF. Consumer Confidence Report (2025 data).
  • COLORADO SPRINGS UTILITIES. Consumer Confidence Report (2025 data).
  • DENVER WATER BOARD. Consumer Confidence Report (2025 data).
  • D.C. WATER AND SEWER AUTHORITY. Consumer Confidence Report (2025 data).
  • Electronic Code of Federal Regulations, Title 40, Part 141 (National Primary Drinking Water Regulations), up to date as of October 15, 2026.
  • CAPE CORAL, CITY OF. Consumer Confidence Report (2025 data).
  • JEA MAJOR GRID. Consumer Confidence Report (2025 data).
  • MDWASA - MAIN SYSTEM. Consumer Confidence Report (2025 data).
  • ORLANDO UTILITIES COMMISSION. Consumer Confidence Report (2025 data).
  • PORT ST LUCIE UTILITIES. Consumer Confidence Report (2025 data).
  • ST PETERSBURG, CITY OF. Consumer Confidence Report (2025 data).
  • CITY OF TAMPA WATER DEPARTMENT. Consumer Confidence Report (2025 data).
  • ATLANTA. Consumer Confidence Report (2025 data).
  • HNL-WINDWARD-PEARL HARBOR. Consumer Confidence Report (2025 data).
  • VEOLIA WATER IDAHO. Consumer Confidence Report (2025 data).
  • CHICAGO. Consumer Confidence Report (2025 data).
  • FORT WAYNE - 3 RIVERS FILTRATION PLANT. Consumer Confidence Report (2025 data).
  • CITIZENS WATER - INDIANAPOLIS. Consumer Confidence Report (2025 data).
  • WICHITA, CITY OF. Consumer Confidence Report (2025 data).
  • KENTUCKY-AMERICAN WATER CO. Consumer Confidence Report (2025 data).
  • LOUISVILLE WATER COMPANY. Consumer Confidence Report (2025 data).
  • NEW ORLEANS CARROLLTON WATER WORKS. Consumer Confidence Report (2025 data).
  • BOSTON WATER AND SEWER COMMISSION (MWRA). Consumer Confidence Report (2025 data).
  • CITY OF BALTIMORE. Consumer Confidence Report (2025 data).
  • DETROIT CITY OF. Consumer Confidence Report (2025 data).
  • Minneapolis. Consumer Confidence Report (2025 data).
  • Saint Paul Regional Water Services. Consumer Confidence Report (2025 data).
  • KANSAS CITY PWS. Consumer Confidence Report (2025 data).
  • ST LOUIS CITY PWS. Consumer Confidence Report (2025 data).
  • CHARLOTTE WATER. Consumer Confidence Report (2025 data).
  • DURHAM, CITY OF. Consumer Confidence Report (2025 data).
  • GREENSBORO, CITY OF. Consumer Confidence Report (2025 data).
  • RALEIGH, CITY OF. Consumer Confidence Report (2025 data).
  • WINSTON-SALEM, CITY OF. Consumer Confidence Report (2025 data).
  • LINCOLN, CITY OF. Consumer Confidence Report (2025 data).
  • METROPOLITAN UTILITIES DISTRICT. Consumer Confidence Report (2025 data).
  • JERSEY CITY MUA. Consumer Confidence Report (2025 data).
  • NEWARK WATER DEPARTMENT. Consumer Confidence Report (2025 data).
  • ALBUQUERQUE WATER SYSTEM. Consumer Confidence Report (2025 data).
  • HENDERSON CITY OF. Consumer Confidence Report (2025 data).
  • LAS VEGAS VALLEY WATER DISTRICT. Consumer Confidence Report (2025 data).
  • NORTH LAS VEGAS UTILITIES. Consumer Confidence Report (2025 data).
  • TRUCKEE MEADOWS WATER AUTHORITY. Consumer Confidence Report (2025 data).
  • BUFFALO WATER AUTHORITY. Consumer Confidence Report (2025 data).
  • NEW YORK CITY SYSTEM. Consumer Confidence Report (2025 data).
  • CINCINNATI PUBLIC WATER SYSTEM. Consumer Confidence Report (2025 data).
  • CLEVELAND PUBLIC WATER SYSTEM. Consumer Confidence Report (2025 data).
  • COLUMBUS PUBLIC WATER SYSTEM. Consumer Confidence Report (2025 data).
  • TOLEDO CITY OF. Consumer Confidence Report (2025 data).
  • OKLAHOMA CITY. Consumer Confidence Report (2025 data).
  • TULSA. Consumer Confidence Report (2025 data).
  • PORTLAND WATER BUREAU. Consumer Confidence Report (2025 data).
  • PHILADELPHIA WATER DEPARTMENT. Consumer Confidence Report (2025 data).
  • PITTSBURGH WATER & SEWER AUTH. Consumer Confidence Report (2025 data).
  • MEMPHIS LIGHT, GAS, & WATER. Consumer Confidence Report (2025 data).
  • METRO WATER SERVICES. Consumer Confidence Report (2025 data).
  • CITY OF ARLINGTON. Consumer Confidence Report (2025 data).
  • CITY OF AUSTIN WATER & WASTEWASTEWATER. Consumer Confidence Report (2025 data).
  • CITY OF CORPUS CHRISTI. Consumer Confidence Report (2025 data).
  • DALLAS WATER UTILITY. Consumer Confidence Report (2025 data).
  • EL PASO WATER UTILITIES. Consumer Confidence Report (2025 data).
  • CITY OF FORT WORTH. Consumer Confidence Report (2025 data).
  • CITY OF FRISCO. Consumer Confidence Report (2025 data).
  • CITY OF GARLAND. Consumer Confidence Report (2025 data).
  • CITY OF HOUSTON. Consumer Confidence Report (2025 data).
  • CITY OF IRVING. Consumer Confidence Report (2025 data).
  • CITY OF LAREDO. Consumer Confidence Report (2025 data).
  • LUBBOCK PUBLIC WATER SYSTEM. Consumer Confidence Report (2025 data).
  • CITY OF MCKINNEY. Consumer Confidence Report (2025 data).
  • CITY OF PLANO. Consumer Confidence Report (2025 data).
  • SAN ANTONIO WATER SYSTEM. Consumer Confidence Report (2025 data).
  • City of Chesapeake. 2025 Water Quality Report (2025 data).
  • RICHMOND, CITY OF. Consumer Confidence Report (2025 data).
  • City of Virginia Beach. 2026 Water Quality Report for 2025 data.
  • SEATTLE PUBLIC UTILITIES. Consumer Confidence Report (2025 data).
  • MADISON WATER UTILITY. Consumer Confidence Report (2025 data).
  • MILWAUKEE WATERWORKS. Consumer Confidence Report (2025 data).

EPA compliance history, weight 20

InputData window
Safe Drinking Water Act records (EPA)2021-10-01 to 2026-09-30
Sources cited for this pillar (3)
  • Electronic Code of Federal Regulations, Title 40, Part 141 (National Primary Drinking Water Regulations), up to date as of October 15, 2026.
  • U.S. EPA ECHO (2026). SDWA data downloads (SDWA_latest_downloads.zip), build of July 9, 2026.
  • U.S. EPA ECHO (2026). SDWA data downloads (SDWA_latest_downloads.zip), build of October 13, 2026.

Which water system stands for each city

Each city is ranked on its largest-share water system, named on its row. A second system serving at least 10 % of the city's population is listed with it, and near-even splits are tested as population-weighted blends in the sensitivity analysis. Every other system our search found for a city is listed below with its PWSID and, if rejected, the reason.

Share method: 2020 block POP20; whole-block Census internal point in 2025 place and retail service area; sourced beats modeled; same-kind overlaps split equally. Shares are estimates; unmapped population stays in the denominator.

Candidate screen: own-system-v3.

Sources for the attribution (19)
  • U.S. Census Bureau (2020). TIGER/Line Shapefiles 2020: Tabulation blocks with 2020 population (POP20), for the same 35 jurisdictions.
  • U.S. Census Bureau (2025). TIGER/Line Shapefiles 2025: Places, for the 34 states and DC holding the study's 100 cities.
  • U.S. EPA Office of Water (2026). Community Water Service Area Boundaries, Version 3.0 (updated March 17, 2026). MIT License.
  • U.S. EPA ECHO (2026). SDWA data downloads (SDWA_latest_downloads.zip), build of July 9, 2026.
  • U.S. EPA Envirofacts (2026). SDWIS WATER_SYSTEM table, per-PWSID JSON responses for the study's ranked and candidate systems.
  • California Water Service. (June 24, 2021). 2020 Urban Water Management Plan โ€” Bakersfield District.
  • City of Bakersfield. (April 2009). 2.7 Public Services and Facilities Element โ€” Draft Existing Conditions, Constraints and Opportunities Report.
  • Otay Water District. (n.d.). Frequently Asked Questions.
  • Sweetwater Authority. (n.d.). Our Water.
  • San Jose Water Company. (June 2021 (draft)). 2020 Urban Water Management Plan.
  • City of San Jose. (n.d.). Layer: Water Service Provider (ID: 348).
  • City of Stockton; hosted by California State Water Resources Control Board. (n.d.). Testimony of Robert Granberg โ€” STKN-010.
  • City of Atlanta, Department of Watershed Management. (2022; publication date not stated). 2022 DWM Annual Report.
  • City of Atlanta, Department of Watershed Management. (n.d.). About Us.
  • City of Atlanta, Department of Watershed Management. (n.d.). Drinking Water Service Area.
  • Hawaiสปi Department of Health, Safe Drinking Water Branch. (SFY 2027; publication date not stated). DWSRF Project Priority List for SFY 2027.
  • Pittsburgh Water. (n.d.). Water Quality & Treatment.
  • City of Houston, Houston Public Works. (2024 report period; publication date not stated). Houston Water Quality Report | Jan - Dec 2024.
  • City of Chesapeake, Department of Public Utilities. (2022 data; publication date not stated). Water Quality Report โ€” 2022 Data.

The full attribution register

100 cities, 109 attributed systems and 1275 rejected systems. Open a city to see its systems.

Standard rejection reasons, as labelled in the tables

No service evidence
Listed in our city data, but no record or map we hold shows it serves this place.
Captive supply
Name identifies a captive residential or institutional supply, not the city's public supply.
Inactive
Inactive SDWIS system: excluded from allocation.
Wholesale only
Wholesale-only system: SDWIS records zero retail population; not a distribution-system candidate.
No allocated population
No allocated place population in the captured service-area overlay.
New York, NY: 1 attributed, 5 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NY7003493NEW YORK CITY SYSTEMRanked99.8 %NoneoverlaySystem Sourced8,271,000None
Rejected systems
PWSIDSystemReason
NY2902830WA OF WESTERN NASSAUNo service evidence
NY2902835LIBERTY UTILITIES NEW YORK - LYNBROOKNo service evidence
NY5903441MOUNT VERNON WATER DEPARTMENTNo service evidence
NY5903444VEOLIA WATER NEW YORK, INC. RD-1No service evidence
NY5903465YONKERS CITYNo service evidence
Los Angeles, CA: 1 attributed, 33 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA1910067LOS ANGELES-CITY, DEPT. OF WATER & POWERRanked99.9 %NoneoverlaySystem Sourced3,875,566None
Rejected systems
PWSIDSystemReason
CA1900055BLUE SKIES MOBILE HOME PARKNo service evidence
CA1900303LLANO MUTUAL WATER COMPANYNo service evidence
CA1900693DESERT PALMS MOBILE HOME PARKCaptive supply
CA1900849LLANO DEL RIO WATER COMPANYNo service evidence
CA1900913LILY OF THE VALLEY MOBILE VILLAGENo service evidence
CA1910001CITY OF ALHAMBRANo service evidence
CA1910010CALIFORNIA WATER SERVICE CO.-LANCASTERNo service evidence
CA1910017SANTA CLARITA VALLEY W.A.-SANTA CLARITAInactive
CA1910021LIBERTY UTILITIES - COMPTONNo service evidence
CA1910036CALIFORNIA WATER SERVICE CO. - ELANo service evidence
CA1910040EL SEGUNDO-CITY, WATER DEPT.No service evidence
CA1910043GLENDALE-CITY, WATER DEPT.No service evidence
CA1910048SANTA CLARITA VALLEY W.A.-IMPORTED DIVISInactive
CA1910050COMMERCE-CITY, WATER DEPT.No service evidence
CA1910051INGLEWOOD- CITY, WATER DEPT.No service evidence
CA1910065LONG BEACH UTILITIES DEPARTMENTNo service evidence
CA1910073LOMITA-CITY, WATER DEPT.No service evidence
CA1910075LOS ANGELES CWWD 21-KAGEL CANYONNo service evidence
CA1910079LYNWOOD-CITY, WATER DEPT.No service evidence
CA1910092MONTEREY PARK-CITY, WATER DEPT.No service evidence
CA1910096SANTA CLARITA VALLEY W.A.-NEWHALL DIV.Inactive
CA1910104CALIFORNIA WATER SERVICE CO. - PALOS VERNo service evidence
CA1910152SOUTH GATE-CITY, WATER DEPT.No service evidence
CA1910154CITY OF SOUTH PASADENANo service evidence
CA1910167VERNON-CITY, WATER DEPT.No service evidence
CA1910179BURBANK-CITY, WATER DEPT.No service evidence
CA1910204LOS ANGELES CWWD 29 & 80-MALIBUNo service evidence
CA1910213TORRANCE-CITY, WATER DEPT.No service evidence
CA1910240SANTA CLARITA VALLEY WATER AGENCYNo service evidence
CA1910247SANTA CLARITA VALLEY W.A.-CASTAIC DIV.Inactive
CA5610003VENTURA CWWD NO. 17 - BELL CANYONNo service evidence
CA5610023VENTURA WWD NO. 8 - SIMI VALLEYNo service evidence
CA5610050CALLEGUAS MUNICIPAL WATER DISTWholesale only
Chicago, IL: 1 attributed, 28 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
IL0316000CHICAGORanked100.0 %NoneoverlaySystem Sourced2,721,308None
Rejected systems
PWSIDSystemReason
IL0310030ALSIPNo service evidence
IL0310120BEDFORD PARKNo service evidence
IL0310240BLUE ISLANDNo service evidence
IL0310360BURNHAMNo service evidence
IL0310420CALUMET PARKNo service evidence
IL0310630DES PLAINESNo service evidence
IL0310690DOLTONNo service evidence
IL0310780ELMWOOD PARKNo service evidence
IL0310810EVANSTONNo service evidence
IL0310840EVERGREEN PARKNo service evidence
IL0310960FRANKLIN PARKNo service evidence
IL0311140HARWOOD HEIGHTSNo service evidence
IL0311320HOMETOWNNo service evidence
IL0311890MERRIONETTE PARKNo service evidence
IL0312010NILESNo service evidence
IL0312040NORRIDGENo service evidence
IL0312220OAK LAWNNo service evidence
IL0312250OAK PARKNo service evidence
IL0312580RIVERDALENo service evidence
IL0312640RIVER GROVENo service evidence
IL0312760ROSEMONTNo service evidence
IL0312850SCHILLER PARKNo service evidence
IL0312880SKOKIENo service evidence
IL0315620GARDEN HOME SDNo service evidence
IL0315650GLEN EDEN ESTATES HOMEOWNERS ASSOCIATIONCaptive supply
IL0317765BLACKHAWK ESTATES LLCCaptive supply
IL0434140BENSENVILLENo service evidence
IN5245020HAMMOND WATER WORKS DEPARTMENTNo service evidence
Houston, TX: 1 attributed, 246 rejected (confidence medium)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX1010013CITY OF HOUSTONRanked93.4 %NoneoverlaySystem Sourced2,970,543None
Rejected systems
PWSIDSystemReason
TX0200008CITY OF PEARLANDNo service evidence
TX0790004FORT BEND COUNTY WCID 2No service evidence
TX0790005CITY OF SUGAR LANDNo service evidence
TX0790025CITY OF MEADOWS PLACENo service evidence
TX0790038FORT BEND COUNTY MUD 2No service evidence
TX0790137FORT BEND COUNTY MUD 26 QUAIL GREEN WESTNo service evidence
TX0790207CITY OF MISSOURI CITY MUSTANG BAYOU WATENo service evidence
TX0790216HARRIS FORT BEND COUNTIES MUD 1No service evidence
TX0790237FORT BEND COUNTY MUD 23No service evidence
TX0790274CINCO MUD 1No service evidence
TX0790292CINCO MUD 3No service evidence
TX0790307CINCO MUD 9No service evidence
TX0790316CINCO MUD 6No service evidence
TX0790324CINCO MUD 8No service evidence
TX0790332BIG OAKS MUDNo service evidence
TX0790347HARRIS FORT BEND COUNTIES MUD 5No service evidence
TX0790386CINCO MUD 10No service evidence
TX0790387GRAND LAKES MUD 2No service evidence
TX0790410GRAND LAKES MUD 1No service evidence
TX0790422CINCO MUD 14No service evidence
TX0790429FORT BEND COUNTY MUD 142No service evidence
TX0790430GRAND MISSION MUD 1No service evidence
TX0790433FORT BEND COUNTY MUD 35No service evidence
TX0790435FORT BEND COUNTY MUD 146No service evidence
TX0790438CINCO SOUTHWEST MUD 1No service evidence
TX0790440FORT BEND COUNTY FWSD 2No service evidence
TX0790468FORT BEND COUNTY MUD 24No service evidence
TX0790478FORT BEND COUNTY MUD 185No service evidence
TX0790521CINCO SOUTHWEST MUD 3 DAYCARENo service evidence
TX0790548FORT BEND COUNTY MUD 206 VICTORIAN GARDENo service evidence
TX0790550WILLOW POINT MUDNo service evidence
TX0840002CITY OF FRIENDSWOODNo service evidence
TX1010003CITY OF BAYTOWNNo service evidence
TX1010004CITY OF BELLAIRENo service evidence
TX1010009CITY OF GALENA PARKNo service evidence
TX1010014CITY OF HUMBLENo service evidence
TX1010015CITY OF JACINTO CITYNo service evidence
TX1010016CITY OF JERSEY VILLAGENo service evidence
TX1010017CITY OF KATYNo service evidence
TX1010022SUNBELT FWSD OAKWILDE SUBDIVISIONCaptive supply
TX1010023CITY OF SOUTHSIDE PLACENo service evidence
TX1010026CITY OF TOMBALLNo service evidence
TX1010027CITY OF WEST UNIVERSITY PLACECaptive supply
TX1010078PITCAIRN WSCNo service evidence
TX1010082HARRIS COUNTY FWSD 1ANo service evidence
TX1010092ALDINE MEADOWSNo service evidence
TX1010096BAMMEL FOREST UTILITYNo service evidence
TX1010100MARY FRANCIS SUBDIVISIONCaptive supply
TX1010106CITY OF BUNKER HILL VILLAGENo service evidence
TX1010111CASTLEWOOD SUBDIVISIONCaptive supply
TX1010116COLONIAL HILLSNo service evidence
TX1010120CYPRESS FOREST WATER SYSTEMNo service evidence
TX1010122DORSETT PLACENo service evidence
TX1010148MEMORIAL VILLAGES WATER AUTHORITYNo service evidence
TX1010152CITY OF NASSAU BAYNo service evidence
TX1010196RALSTON ACRES WATER SUPPLY CORPORATIONNo service evidence
TX1010205SEQUOIA IMPROVEMENT DISTRICTNo service evidence
TX1010209HARRIS COUNTY FWSD 58No service evidence
TX1010214CITY OF SPRING VALLEY VILLAGENo service evidence
TX1010216STETNER ADDITIONNo service evidence
TX1010218SWEA GARDENS ESTATESCaptive supply
TX1010220TALL PINES UTILITYNo service evidence
TX1010233CHAMPIONS MUDNo service evidence
TX1010237HARRIS COUNTY FWSD 61No service evidence
TX1010249HARRIS COUNTY WCID FONDREN ROADNo service evidence
TX1010254CYPRESS PLACENo service evidence
TX1010255SPRINGMONT SUBDIVISIONCaptive supply
TX1010293CITY OF PASADENANo service evidence
TX1010294CITY OF SOUTH HOUSTONNo service evidence
TX1010307REDWOOD ESTATES MOBILE HOME PARKCaptive supply
TX1010349GREENS ROAD MOBILE HOME COMMUNITYInactive
TX1010355HARRIS COUNTY WCID 136No service evidence
TX1010365BAMMEL UTILITY DISTRICTNo service evidence
TX1010387MEADOWHILL REGIONAL MUDNo service evidence
TX1010389SPANISH COVE PUDNo service evidence
TX1010419SUNBELT FWSD HEATHER GLEN SUBDIVISIONCaptive supply
TX1010431CYPRESS KLEIN UTILITY DISTRICT WIMBLETONNo service evidence
TX1010432CYPRESSWOOD UTILITY DISTRICTNo service evidence
TX1010439KIRKMONT MUDNo service evidence
TX1010447TIMBERLAKE IMPROVEMENT DISTRICTNo service evidence
TX1010471EL DORADO UTILITY DISTRICTNo service evidence
TX1010500HARRIS COUNTY MUD 5No service evidence
TX1010509HARRIS COUNTY WCID 119No service evidence
TX1010512HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERSNo service evidence
TX1010517MADING LANENo service evidence
TX1010520ROYAL COACH MOBILE HOME VILLAGECaptive supply
TX1010532CANDLELIGHT HILLS SUBDIVISIONCaptive supply
TX1010535PINE TRAILS UTILITYNo service evidence
TX1010541EMERALD FOREST UTILITY DISTRICTNo service evidence
TX1010545HARRIS COUNTY FWSD 45No service evidence
TX1010572HARRIS COUNTY MUD 24No service evidence
TX1010592DOWDELL PUDNo service evidence
TX1010599HARRIS COUNTY MUD 136No service evidence
TX1010600HARRIS COUNTY MUD 69No service evidence
TX1010622WESTGATE SUBDIVISIONCaptive supply
TX1010625TATTOR ROAD MUDNo service evidence
TX1010629CYPRESS CROSSINGNo service evidence
TX1010631POSTWOOD MUDNo service evidence
TX1010632CHARTERWOOD MUDNo service evidence
TX1010647BLUE BELL MANOR SUBDIVISIONCaptive supply
TX1010651PEAKES PARKNo service evidence
TX1010684HARRIS COUNTY WCID 99No service evidence
TX1010715HARRIS COUNTY MUD 26No service evidence
TX1010718HARRIS COUNTY MUD 44No service evidence
TX1010743MELROSE MHPCaptive supply
TX1010751PINE OAK FOREST WATERNo service evidence
TX1010809BAMMEL OAKS ESTATES 1Captive supply
TX1010810BAMMEL OAKS ESTATES 2Captive supply
TX1010877SILVERWOODS SUBDIVISIONCaptive supply
TX1010901PINE VILLAGE PUDNo service evidence
TX1010905HARRIS COUNTY MUD 151No service evidence
TX1010908RICE UNIVERSITYCaptive supply
TX1010923HARRIS COUNTY MUD 144No service evidence
TX1010924WINDFERN FOREST UTILITY DISTRICTNo service evidence
TX1011008NORTHWEST HARRIS COUNTY MUD 6No service evidence
TX1011014BRITTMOORE UTILITYNo service evidence
TX1011029WEST HARRIS COUNTY MUD 2 CHASENo service evidence
TX1011071RIO VILLA WSCNo service evidence
TX1011084BOUDREAUX GARDENSNo service evidence
TX1011112CYPRESSWOOD MHPCaptive supply
TX1011143KLEIN PUDNo service evidence
TX1011219BRANDYWINE PINESNo service evidence
TX1011237WOODCREEK MUDNo service evidence
TX1011238WHITE OAK BEND MUDNo service evidence
TX1011242MEMORIAL MUDNo service evidence
TX1011433VAN MANOR MOBILE HOME PARKCaptive supply
TX1011521TRAILWOOD SUBDIVISIONCaptive supply
TX1011522CY CHAMP PUDNo service evidence
TX1011550BRIDGESTONE MUDNo service evidence
TX1011551BINFORD PLACE SUBDIVISIONCaptive supply
TX1011567KINGSLAND ESTATES WSCCaptive supply
TX1011603NORTHWEST HARRIS COUNTY MUD 16No service evidence
TX1011632CARBY MOBILE HOME PARKCaptive supply
TX1011649NORTHWEST HARRIS COUNTY MUD 10No service evidence
TX1011651CYPRESS FIELDS SUBDIVISIONCaptive supply
TX1011678HARRIS COUNTY MUD 65No service evidence
TX1011681CLAY ROAD MUDNo service evidence
TX1011685MORTON ROAD MUDNo service evidence
TX1011687ATASCOCITA ACRES SUBDIVISIONCaptive supply
TX1011689MAYDE CREEK MUDNo service evidence
TX1011690HARRIS COUNTY MUD 70No service evidence
TX1011708WHISPER MEADOWSNo service evidence
TX1011745NORTHWEST HARRIS COUNTY MUD 22No service evidence
TX1011781HARRIS COUNTY UD 14No service evidence
TX1011796WOODGATE MOBILE HOME VILLAGECaptive supply
TX1011799HARRIS COUNTY MUD 180No service evidence
TX1011812WILLOW OAKS MOBILE HOME SUBDIVISIONCaptive supply
TX1011823HARRIS COUNTY MUD 71No service evidence
TX1011824HARRIS COUNTY MUD 183No service evidence
TX1011825WEST HARRIS COUNTY MUD 4No service evidence
TX1011833CASTLEWOOD MUDNo service evidence
TX1011839GREEN TRAILS MUDNo service evidence
TX1011860BERRY HILL ESTATESCaptive supply
TX1011901NORTHWEST HARRIS COUNTY MUD 12No service evidence
TX1011908HARRIS COUNTY MUD 368No service evidence
TX1011927NORTHWEST HARRIS COUNTY MUD 19No service evidence
TX1011929RICHEY ROAD MUDNo service evidence
TX1011973TIMBERCREST VILLAGENo service evidence
TX1011983HARRIS COUNTY MUD 217No service evidence
TX1011991GRANT ROAD PUDNo service evidence
TX1011995BAYOU FOREST VILLAGE MOBILE HOME PARKCaptive supply
TX1011999NORTH BELT FORESTNo service evidence
TX1012007HARRIS COUNTY MUD 200 CRANBROOKNo service evidence
TX1012015WINTERHAVEN SUBDIVISIONCaptive supply
TX1012068WEST HARRIS COUNTY MUD 10No service evidence
TX1012097HARRIS COUNTY MUD 130No service evidence
TX1012154PINEWOOD PLACE MOBILE HOME COMMUNITYCaptive supply
TX1012227RICEWOOD MUDNo service evidence
TX1012228WEST HARRIS COUNTY MUD 7No service evidence
TX1012229HARRIS COUNTY MUD 127No service evidence
TX1012238WEST HARRIS COUNTY MUD 17No service evidence
TX1012297HARRIS COUNTY MUD 158No service evidence
TX1012315NOTTINGHAM COUNTRY MUDNo service evidence
TX1012330HARRIS COUNTY MUD 264No service evidence
TX1012356HARRIS COUNTY MUD 202No service evidence
TX1012361HARRIS COUNTY MUD 238No service evidence
TX1012370HARRIS COUNTY WCID 89No service evidence
TX1012378CYPRESS HILL MUD 1No service evidence
TX1012532HARRIS COUNTY MUD 286No service evidence
TX1012577HARRIS COUNTY MUD 216No service evidence
TX1012768HARRIS COUNTY MUD 345No service evidence
TX1012848NORTHWEST HARRIS COUNTY MUD 36No service evidence
TX1012865KINGS MANOR MUDNo service evidence
TX1012877ROLLING CREEK UTILITY DISTRICTNo service evidence
TX1012897HARRIS COUNTY MUD 360No service evidence
TX1012913HARRIS COUNTY MUD 321No service evidence
TX1012917HARRIS COUNTY MUD 341No service evidence
TX1012951NORTHWEST HARRIS COUNTY MUD 30No service evidence
TX1012962BAKER ROAD MUDNo service evidence
TX1012969HARRIS COUNTY MUD 358No service evidence
TX1012987CITY OF HILSHIRE VILLAGENo service evidence
TX1013009HARRIS COUNTY MUD 365No service evidence
TX1013050LAKES OF ROSEHILL WATER SYSTEMNo service evidence
TX1013063HARRIS COUNTY MUD 280No service evidence
TX1013078NORTHGATE CROSSING MUD 2No service evidence
TX1013089HERON LAKES ESTATESCaptive supply
TX1013107HARRIS COUNTY MUD 371No service evidence
TX1013113HARRIS COUNTY MUD 370No service evidence
TX1013114HARRIS COUNTY MUD 284No service evidence
TX1013132HARRIS COUNTY MUD 364No service evidence
TX1013144CLASSIC PINES SUBDIVISIONCaptive supply
TX1013146CHAMPION LAKES ESTATES WATER PLANTCaptive supply
TX1013156HARRIS COUNTY UD 16No service evidence
TX1013178HARRIS COUNTY MUD 281No service evidence
TX1013187SUMMER LAKE RANCHNo service evidence
TX1013195WALRAVEN SUBDIVISIONCaptive supply
TX1013253HARRIS COUNTY MUD 391No service evidence
TX1013258NORTHWEST HARRIS COUNTY MUD 28No service evidence
TX1013261SPRING MEADOWS MUDNo service evidence
TX1013289HARRIS COUNTY MUD 401No service evidence
TX1013294HARRIS COUNTY MUD 290No service evidence
TX1013295HARRIS COUNTY MUD 397No service evidence
TX1013296CYPRESS CREEK RANCHNo service evidence
TX1013298NORTH HARRIS COUNTY REGIONAL WATER AUTHOWholesale only
TX1013306HARRIS COUNTY MUD 248No service evidence
TX1013325GRANGER SUBDIVISIONCaptive supply
TX1013346HARRIS COUNTY MUD 399No service evidence
TX1013356WEST HARRIS COUNTY MUD 5No service evidence
TX1013372HARRIS COUNTY MUD 449No service evidence
TX1013376HARRIS COUNTY MUD 421No service evidence
TX1013378HARRIS COUNTY MUD 432No service evidence
TX1013404NORTHWOOD MUD 1No service evidence
TX1013449NORTHEAST HARRIS COUNTY MUD 1 EDGEWOOD VNo service evidence
TX1013450HARRIS COUNTY MUD 374 CYPRESS CREEK LAKENo service evidence
TX1013468SHAW ACRESNo service evidence
TX1013479HARRIS COUNTY IMPROVEMENT DISTRICT 18No service evidence
TX1013531HARRIS COUNTY MUD 531No service evidence
TX1013532HARRIS COUNTY MUD 495No service evidence
TX1013563HARRIS COUNTY MUD 319No service evidence
TX1013586HARRIS COUNTY MUD 537No service evidence
TX1013640HARRIS COUNTY MUD 538No service evidence
TX1013663HARRIS COUNTY MUD 565No service evidence
TX1013695HARRIS COUNTY MUD 213-ANo service evidence
TX1700025CITY OF OAK RIDGE NORTHNo service evidence
TX1700033SPRING FOREST SUBDIVISIONCaptive supply
TX1700068PORTER SPECIAL UTILITY DISTRICTNo service evidence
TX1700090MONTGOMERY COUNTY MUD 6No service evidence
TX1700139MONTGOMERY COUNTY MUD 36No service evidence
TX1700319MONTGOMERY COUNTY MUD 19No service evidence
TX1700344LAZY LANE MOBILE HOME PARKCaptive supply
TX1700348MONTGOMERY COUNTY MUD 46No service evidence
TX1700702ESTATES OF LEGENDS RANCHCaptive supply
TX1700716MONTGOMERY COUNTY MUD 94No service evidence
TX1700717MONTGOMERY COUNTY MUD 89No service evidence
TX1700776MONTGOMERY COUNTY MUD 88No service evidence
TX1700859WOODRIDGE MUDNo service evidence
Phoenix, AZ: 1 attributed, 17 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0407025PHOENIX CITY OFRanked99.5 %NoneoverlaySystem Sourced1,695,000None
Rejected systems
PWSIDSystemReason
AZ0407026DESERT HILLS WATERNo service evidence
AZ0407046LIBERTY WATER LPSCONo service evidence
AZ0407088AVONDALE CITY OFNo service evidence
AZ0407093GLENDALE CITY OFNo service evidence
AZ0407096PEORIA CITY OFNo service evidence
AZ0407100TEMPE CITY OFNo service evidence
AZ040728067 AVE PROPERTY OWNERS ASSOCIATIONNo service evidence
AZ0407307ADJC ADOBE MOUNTAIN SCHOOLCaptive supply
AZ0407621MICHIGAN TRAILER PARKCaptive supply
AZ0407624PIONEER RV RESORTCaptive supply
AZ0407682ORANGEWOOD MOBILE HOME PARKCaptive supply
AZ0407700FEDERAL CORRECTION INSTITUTIONNo service evidence
AZ0409329CS HIGH COUNTRY PINES WATER COMPANYHigh Country Pines: Rural Arizona supply outside the captured Phoenix service-area overlay.
AZ0411037ARIZONA TRAINING PROGRAMArizona Training Program: Institutional supply, not the Phoenix public distribution system.
AZ0411061AWC - CASA GRANDE SOUTH WATER COMPANYCasa Grande South: Rural Arizona supply outside the captured Phoenix service-area overlay.
AZ0413029ACME WATER -DELLS WATERDells Water: Rural Arizona supply outside the captured Phoenix service-area overlay.
AZ0413055ACME WATER - BLUE HILLSAcme Water Blue Hills: Rural Arizona supply outside the captured Phoenix service-area overlay.
Philadelphia, PA: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
PA1510001PHILADELPHIA WATER DEPARTMENTRanked99.6 %NoneoverlaySystem Sourced1,600,000None
Rejected systems
PWSIDSystemReason
NJ0424001MERCHANTVILLE PENNSAUKENNo service evidence
NJ0820001WEST DEPTFORD TWP WATER DEPTNo service evidence
PA1090078AQUA PA BENSALEMNo service evidence
PA7210068SILVER SPRING COUNTRY ESTATESCaptive supply
San Antonio, TX: 1 attributed, 18 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0150018SAN ANTONIO WATER SYSTEMRanked98.3 %NoneoverlaySystem Sourced2,643,729None
Rejected systems
PWSIDSystemReason
TX0150010CITY OF KIRBYNo service evidence
TX0150039CITY OF ALAMO HEIGHTSNo service evidence
TX0150045SAWS CASTLE HILLSInactive
TX0150052SAWS GERONIMO FOREST WATER SYSTEMInactive
TX0150068CITY OF LIVE OAKNo service evidence
TX0150084SAWS NORTHEASTInactive
TX0150092CITY OF SHAVANO PARKNo service evidence
TX0150106BEXAR COUNTY WCID 10 WINDCRESTNo service evidence
TX0150186LAZY ACRES TRAILER PARKCaptive supply
TX0150208NORTH BREEZE MHPCaptive supply
TX0150216FAIR OAKS RANCH UTILITIESNo service evidence
TX0150238EVETTS APARTMENTSCaptive supply
TX0150256LITTLE JOES ICE HOUSE & TRAILER PARKCaptive supply
TX0150431ESTATES UTILITY CO STONEGATECaptive supply
TX0150433ENCHANTED OAKS WSCNo service evidence
TX0150463BLUE SKIES OF TEXAS WESTNo service evidence
TX0150497SAWS TEXAS RESEARCH PARKInactive
TX0940020GREEN VALLEY SUDNo service evidence
San Diego, CA: 1 attributed, 20 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3710020SAN DIEGO, CITY OFRanked95.8 %NoneoverlaySystem Sourced1,408,937None
Rejected systems
PWSIDSystemReason
CA3700866DEL DIOS MUTUAL WATER COMPANYNo service evidence
CA3700934PAUMA VALLEY WATER COMPANYNo service evidence
CA3700936RANCHO ESTATES MUTUAL WATER CO.Captive supply
CA3700938YUIMA MUNICIPAL WATER DISTRICT IDANo service evidence
CA3700958LOS TULES MUTUAL WATER COMPANYNo service evidence
CA3700968SAN PASQUAL ACADEMYNo service evidence
CA3701184BUTTERFIELD RANCHNo service evidence
CA3701837WYNOLA WATER DISTRICTNo service evidence
CA3701988ALPINE OAKS ESTATES LLCCaptive supply
CA3710004DEL MAR, CITY OFNo service evidence
CA3710006ESCONDIDO, CITY OFNo service evidence
CA3710012RANCHO PAUMA MUTUAL WCNo service evidence
CA3710015POWAY, CITY OFNo service evidence
CA3710018RINCON DEL DIABLO MWD (ID-1)No service evidence
CA3710019RAMONA MUNICIPAL WDNo service evidence
CA3710023SANTA FE I.D.No service evidence
CA3710037PADRE DAM MWDNo service evidence
CA3710042SAN DIEGO COUNTY WATER AUTHORITYWholesale only
CA3710044RINCON DEL DIABLO MWD (ID-A)No service evidence
CA3710700CAMP PENDLETON (NORTH)No service evidence
Dallas, TX: 1 attributed, 25 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0570004DALLAS WATER UTILITYRanked99.7 %NoneoverlaySystem Sourced1,356,479None
Rejected systems
PWSIDSystemReason
TX0430007CITY OF PLANONo service evidence
TX0430037BEAR CREEK SUDNo service evidence
TX0570006CITY OF DESOTONo service evidence
TX0570007CITY OF DUNCANVILLENo service evidence
TX0570010CITY OF GARLANDNo service evidence
TX0570012CITY OF HUTCHINSNo service evidence
TX0570013CITY OF LANCASTERNo service evidence
TX0570015CITY OF RICHARDSONNo service evidence
TX0570016CITY OF SEAGOVILLENo service evidence
TX0570031TOWN OF ADDISONNo service evidence
TX0570034CITY OF CARROLLTONNo service evidence
TX0570036CITY OF CEDAR HILLNo service evidence
TX0570038CITY OF COCKRELL HILLNo service evidence
TX0570040CITY OF COPPELLNo service evidence
TX0570044DANIELDALE COMMUNITY WATER SERVICENo service evidence
TX0570047CITY OF FARMERS BRANCHNo service evidence
TX0570048CITY OF GRAND PRAIRIENo service evidence
TX0570049TOWN OF HIGHLAND PARKNo service evidence
TX0570050CITY OF IRVINGNo service evidence
TX0570059TOWN OF SUNNYVALENo service evidence
TX0570061CITY OF UNIVERSITY PARKCaptive supply
TX0570078DALLAS COUNTY PARK CITIES MUDWholesale only
TX1290014FORNEY LAKE WSCNo service evidence
TX1990001CITY OF ROCKWALLNo service evidence
TX1990014CITY OF HEATHNo service evidence
Fort Worth, TX: 1 attributed, 42 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX2200012CITY OF FORT WORTHRanked99.4 %NoneoverlaySystem Sourced955,900None
Rejected systems
PWSIDSystemReason
TX0570048CITY OF GRAND PRAIRIENo service evidence
TX0570050CITY OF IRVINGNo service evidence
TX0610008CITY OF ROANOKENo service evidence
TX0610213UTRWD REGIONAL WATER TREATMENT PLANTWholesale only
TX0610235TOWN OF NORTHLAKENo service evidence
TX1260002CITY OF BURLESONNo service evidence
TX2200001CITY OF ARLINGTONNo service evidence
TX2200005BLUE MOUNDNo service evidence
TX2200010CITY OF EVERMANNo service evidence
TX2200014CITY OF HALTOM CITYNo service evidence
TX2200022CITY OF RICHLAND HILLSNo service evidence
TX2200023CITY OF SAGINAWNo service evidence
TX2200029BENBROOK WATER AUTHORITYNo service evidence
TX2200031CITY OF EULESSNo service evidence
TX2200034CITY OF CROWLEYNo service evidence
TX2200048TOWN OF EDGECLIFF VILLAGENo service evidence
TX2200054CITY OF HURSTNo service evidence
TX2200061LINKWOOD ESTATES SUBDIVISIONCaptive supply
TX2200071CITY OF SANSOM PARKNo service evidence
TX2200072SLAY ESTATESCaptive supply
TX2200081CITY OF WHITE SETTLEMENTNo service evidence
TX2200090HERITAGE OAKS ADDITIONNo service evidence
TX2200096CITY OF KELLERNo service evidence
TX2200100BLUE MOUND ESTATESCaptive supply
TX2200105FRIENDLY OAKS WSCNo service evidence
TX2200107HILLTOP MOBILE HOME PARKCaptive supply
TX2200115SPRING CREEK CIRCLE WSCNo service evidence
TX2200131CITY OF WESTWORTH VILLAGENo service evidence
TX2200186FOREST ACRES GARDENSNo service evidence
TX2200208LUNAR LANE WATER SYSTEMNo service evidence
TX2200277SILVER CREEK ESTATESCaptive supply
TX2200281MARKUM RANCH ESTATESCaptive supply
TX2200291RANCH OAKS SUBDIVISIONCaptive supply
TX2200299SILVER SADDLE ACRESNo service evidence
TX2200326NORTH RIDGE ESTATESCaptive supply
TX2200328CITY OF WATAUGANo service evidence
TX2200329NORTH FORK ESTATESCaptive supply
TX2200332NAVAL AIR STN JOINT RESERVE BASECaptive supply
TX2200337SUN VALLEY ESTATES WATER SUPPLYCaptive supply
TX2200338SAVANNA ESTATESCaptive supply
TX2200343CARSON RANCHNo service evidence
TX2200348PRAIRIE RIDGE ESTATESCaptive supply
Jacksonville, FL: 1 attributed, 15 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL2161328JEA MAJOR GRIDRanked96.1 %NoneoverlaySystem Sourced826,664None
Rejected systems
PWSIDSystemReason
FL2100741ORANGE PARK GRIDNo service evidence
FL2101182TOWN OF ORANGE PARKNo service evidence
FL2160206NEPTUNE BEACHNo service evidence
FL2160390CRYSTAL SPRINGS ESTATES MHPCaptive supply
FL2160563JACKSONVILLE BEACH WTPNo service evidence
FL2160568JACKSONVILLE UNIVERSITYCaptive supply
FL2160601YUKON INDUSTRIES, LTD.No service evidence
FL2160654STUDY ESTATES MHPCaptive supply
FL2160811NORMANDY VILLAGE UTILITY CO.Inactive
FL2161337BARCELONA APARTMENTSCaptive supply
FL2164003SADDLE BROOK LANDINGSNo service evidence
FL2454338JEA: LOFTON OAKS GRIDNo service evidence
FL2550250CYPRESS LANDING WTPNo service evidence
FL2554447SJCU-CR214 MAINLAND WTPNo service evidence
FL2554475SJCU-NORTHEAST UTILITIES WSNo service evidence
Austin, TX: 1 attributed, 40 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX2270001CITY OF AUSTIN WATER & WASTEWATERRanked94.7 %NoneoverlaySystem Sourced1,115,323None
Rejected systems
PWSIDSystemReason
TX0110013AQUA WSCNo service evidence
TX1050029CHAPARRAL WATER SYSTEM HAYSNo service evidence
TX1050058SOUTHWEST TERRITORYNo service evidence
TX1050175REUNION RANCH WCIDNo service evidence
TX2270002CITY OF MANORNo service evidence
TX2270004CITY OF SUNSET VALLEYNo service evidence
TX2270009GARFIELD WSCNo service evidence
TX2270016CITY OF ROLLINGWOODNo service evidence
TX2270017VILLAGE OF SAN LEANNANo service evidence
TX2270018ST STEPHENS EPISCOPAL SCHOOLCaptive supply
TX2270039MARBRIDGE FOUNDATIONNo service evidence
TX2270040MARSHA WSCNo service evidence
TX2270042SLAUGHTER CREEK ACRESNo service evidence
TX2270059ONION CREEK MEADOWSNo service evidence
TX2270114MOORELAND SUBDIVISIONCaptive supply
TX2270126HIGH VALLEY WSCNo service evidence
TX2270161WINDERMERE COMMUNITYNo service evidence
TX2270207TRAVIS COUNTY WCID 19No service evidence
TX2270210INDIAN SPRINGS SUBDIVISIONCaptive supply
TX2270212SHADY HOLLOW ESTATES WSCCaptive supply
TX2270213WOOD ISLAND HOMEOWNERS ASSOCIATION WATERNo service evidence
TX2270220NAMELESS HOLLOW CONDOMINIUMSNo service evidence
TX2270226NORTH AUSTIN MUD 1No service evidence
TX2270227WELLS BRANCH MUD 1No service evidence
TX2270229SHADY HOLLOW MUDNo service evidence
TX2270241TRAVIS COUNTY MUD 2No service evidence
TX2270264NORTHTOWN MUDNo service evidence
TX2270312BARTON CREEK WEST WSCNo service evidence
TX2270313BARTON CREEK WSCNo service evidence
TX2270325TRAVIS COUNTY MUD 4No service evidence
TX2270333TRAVIS COUNTY MUD 10No service evidence
TX2270353TRAVIS COUNTY MUD 14No service evidence
TX2270354BRIARCREEK SUBDIVISIONCaptive supply
TX2270355COTTONWOOD CREEK MUD 1No service evidence
TX2270380WILBARGER CREEK MUD 1No service evidence
TX2270409LAKESIDE WCID 2-ANo service evidence
TX2460003CITY OF ROUND ROCKNo service evidence
TX2460009CITY OF CEDAR PARKNo service evidence
TX2460120WILLIAMSON TRAVIS COUNTY MUD 1No service evidence
TX2460128FERN BLUFF MUDNo service evidence
San Jose, CA: 3 attributed, 9 rejected (confidence medium)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA4310011SAN JOSE WATERRanked77.9 %NoneoverlaySystem Sourced1,039,920None
CA4310022GREAT OAKS WC INCCandidate9.1 %NoneoverlaySystem Sourced110,088Great Oaks Water Co, overlay 9.1%: below the 10% threshold for naming a secondary system
CA4310020CITY OF SAN JOSE - EVG/EDV/COYCandidate9.3 %NoneoverlaySystem Sourced99,783City of San Jose Municipal Water, Evergreen/Edenvale/Coyote, overlay 9.3%: below the 10% secondary threshold; larger than Great Oaks
Rejected systems
PWSIDSystemReason
CA0105008CASTLEWOOD DOMESTIC WATER SYSTEMNo service evidence
CA0110001ALAMEDA COUNTY WATER DISTRICTNo service evidence
CA4300546SIERRA ROAD IMPROVEMENT ASSOCIATION INCInactive
CA4300563MT. PLEASANT WATER USERS ASSOCIATIONNo service evidence
CA4300994COYOTE VALLEY RV RESORTCaptive supply
CA4310006CITY OF MORGAN HILLNo service evidence
CA4310014CITY OF SUNNYVALENo service evidence
CA4310027SANTA CLARA VALLEY WATER DISTRICTWholesale only
CA4310028SAN JOSE STATE UNIVERSITYInactive
Charlotte, NC: 1 attributed, 12 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NC0160010CHARLOTTE WATERRanked97.3 %NoneoverlaySystem Sourced1,206,285None
Rejected systems
PWSIDSystemReason
NC0113010CONCORD, CITY OFNo service evidence
NC0113025HARRISBURG, TOWN OFNo service evidence
NC0160156LAMPLIGHTER SOUTH-DANBYNo service evidence
NC0160171OAKDALE S/DNo service evidence
NC0160265MOUNTAIN POINT S/DNo service evidence
NC0160282ROCKY RIDGE S/DNo service evidence
NC0190413UNION COUNTY WATER SYSTEMUnion County Water System is a different county's utility.
NC2060054LARKHAVEN S/DNo service evidence
NC2060100THE ENCLAVE AT CITY PARKNo service evidence
NC7065035MASON LANDING S/DNo service evidence
SC4620002YORK COUNTY EAST WD (SC4620002)No service evidence
SC4650035BGWC CAROWOOD (SC4650035)No service evidence
Columbus, OH: 1 attributed, 13 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OH2504412COLUMBUS PUBLIC WATER SYSTEMRanked99.2 %NoneoverlaySystem Sourced1,309,468None
Rejected systems
PWSIDSystemReason
OH2301512PICKERINGTON CITY PWSNo service evidence
OH2301912FAIRFIELD COUNTY UTILITIES PWSNo service evidence
OH2500103BEXLEY CITY PWSNo service evidence
OH2500212BY WAY MOBILE HOME PARKCaptive supply
OH2500712ENCHANTED ACRES MHPCaptive supply
OH2501003SANITARY DISTRICT #4No service evidence
OH2502212OBETZ VILLAGE PWSNo service evidence
OH2502512AQUA OHIO - HUBER RIDGE PWSNo service evidence
OH2502712AQUA OHIO - TIMBERBROOK PWNo service evidence
OH2503411WESTERVILLE CITY PWSNo service evidence
OH2504012JEFFERSON WATER AND SEWER DISTRICT PWSNo service evidence
OH2566512OBETZ SATELLITE 6 PWSNo service evidence
OH2570717LEONARD PARK PWSNo service evidence
Indianapolis, IN: 1 attributed, 10 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
IN5249004CITIZENS WATER - INDIANAPOLISRanked99.7 %NoneoverlaySystem Sourced880,345None
Rejected systems
PWSIDSystemReason
IN5206002ZIONSVILLE MHP TRUSTCaptive supply
IN5241010INDIANA MASONIC HOMENo service evidence
IN5245001APPLE VALLEY UTILITIES, INC.No service evidence
IN5245017AQUA INDIANA WATER COMPANYNo service evidence
IN5249005CITY OF LAWRENCE UTILITIESNo service evidence
IN5249008SPEEDWAY WATER WORKSNo service evidence
IN5255010MORGAN COUNTY RURAL WATER COMPANYNo service evidence
IN5255019CITIZENS WATER - MORGANNo service evidence
IN5273001BLUE RIVER ESTATES MOBILE HOME PARKCaptive supply
IN5273004CREEKSIDE MOBILE HOME PARKCaptive supply
San Francisco, CA: 1 attributed, 8 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3810011SFPUC CITY DISTRIBUTION DIVISIONRanked99.5 %NoneoverlaySystem Sourced848,019None
Rejected systems
PWSIDSystemReason
CA0110005EAST BAY MUDNo service evidence
CA0110016ALAMEDA POINTNo service evidence
CA2110002MARIN MUNICIPAL WATER DISTRICTNo service evidence
CA2110350NPS GGNRANo service evidence
CA3810001SAN FRANCISCO REGIONAL WATER SYSTEMNo service evidence
CA3810003HHW&P MOCCASIN COMPOUND-SFPUCNo service evidence
CA4110002CITY OF BRISBANENo service evidence
CA4110013CITY OF DALY CITYNo service evidence
Seattle, WA: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
WA5377050SEATTLE PUBLIC UTILITIESRanked99.5 %NoneoverlaySystem Sourced1,161,961None
Rejected systems
PWSIDSystemReason
WA5312630CHERRYWOOD MOBILE HOME MANORCaptive supply
WA5332900Highlands Utility DistrictNo service evidence
WA5338950KING COUNTY WATER DISTRICT #20No service evidence
Denver, CO: 1 attributed, 34 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CO0116001DENVER WATER BOARDRanked99.3 %NoneoverlaySystem Sourced1,287,000None
Rejected systems
PWSIDSystemReason
CO0101105NORTH WASHINGTON STREET WSDNo service evidence
CO0101140SOUTH ADAMS COUNTY WSDNo service evidence
CO0101234EASTERN ADAMS CO MDNo service evidence
CO0103035EAST CHERRY CREEK VALLEY WSDNo service evidence
CO0103153BOW MAR WSDNo service evidence
CO0103166CASTLEWOOD WATER AND SANITATION DISTRICTInactive
CO0103176CHERRY CREEK VILLAGE WDNo service evidence
CO0103178CHERRY HILLS HEIGHTS WSInactive
CO0103345HILLCREST WSDInactive
CO0103476LITTLETON CITY OFInactive
CO0103614PLATTE CANYON WSDNo service evidence
CO0116104ADVENIR FRENCH QUARTERNo service evidence
CO0116140BERKELEY WSDInactive
CO0116179CHERRY HILLS NORTH WSDInactive
CO0116343HI LIN WSDInactive
CO0116352HOLLY HILLS WSDInactive
CO0116552NORTH LINCOLN WSDNo service evidence
CO0116553NORTH PECOS WSDNo service evidence
CO0118285FOXHILL MDNo service evidence
CO0130020CONSOLIDATED MUTUAL MAPLE GROVENo service evidence
CO0130021CONSOLIDATED MUTAL WCInactive
CO0130070INSPIRATION VALLEY MHPCaptive supply
CO0130116ALAMEDA WSDNo service evidence
CO0130133BANCROFT CLOVER WSDNo service evidence
CO0130138BEAR CREEK WSDNo service evidence
CO0130139BENNETT BEAR CREEK FARMS WSDInactive
CO0130466LAKEHURST WSDNo service evidence
CO0130724SOUTHWEST SUBURBAN DENVER WSInactive
CO0130842WHEAT RIDGE WATER DISTRICTNo service evidence
CO0130843WILLOWBROOK WSDNo service evidence
CO0160050ALPINE VILLAGE MHPCaptive supply
CO0162155BRIGGSDALE WCNo service evidence
CO0162553NORTH WELD COUNTY WDNo service evidence
CO0196618CHERRY HILLS VILLAGE WTR DISTInactive
Nashville, TN: 1 attributed, 7 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TN0000494METRO WATER SERVICESRanked85.9 %NoneoverlaySystem Sourced789,969None
Rejected systems
PWSIDSystemReason
TN0000023ASHLAND CITY WATER DEPARTMENTNo service evidence
TN0000246FRANKLIN WATER DEPTNo service evidence
TN0000294HENDERSONVILLE U.D.No service evidence
TN0000386LA VERGNE WATER SYSTEMNo service evidence
TN0000511NOLENSVILLE-COLLEGE GROVE U.D.Captive supply
TN0000645SECOND SOUTH CHEATHAM U.D.No service evidence
TN0000743WEST WILSON UTILITY DISTRICTNo service evidence
Oklahoma City, OK: 1 attributed, 18 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OK1020902OKLAHOMA CITYRanked82.8 %NoneoverlaySystem Sourced644,000None
Rejected systems
PWSIDSystemReason
OK2000907BLUE QUAIL ESTATESCaptive supply
OK2000909PIEDMONT MUNICIPAL AUTHORITYNo service evidence
OK2001432BLUEJAY MOBILE VILLAGEInactive
OK2002608TUTTLENo service evidence
OK2004704NEWCASTLENo service evidence
OK2005503LUTHERNo service evidence
OK2005507JONESNo service evidence
OK2005508TINKER AIR FORCE BASECaptive supply
OK2005509SPENCERNo service evidence
OK2005513HILLCREST MHPCaptive supply
OK2005532SHERWOOD FOREST MOBILE ESTATESCaptive supply
OK2005534HOLLIDAY OUTT MHPCaptive supply
OK2006301MCLOUDNo service evidence
OK3005557LAKE FOREST MHPCaptive supply
OK4002610COUNTRY MHPCaptive supply
OK4005577HILLTOP MHPCaptive supply
OK4005589SOONER UTILITIES - CIRCLE C ESTATESCaptive supply
OK5005548ABES RV PARKCaptive supply
Washington, DC: 1 attributed, 7 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
DC0000002D.C. WATER AND SEWER AUTHORITYRanked100.0 %NoneoverlaySystem Sourced632,323None
Rejected systems
PWSIDSystemReason
DC0000001WASHINGTON AQUEDUCT DIVISION.Wholesale only
DC0000003NAVAL STATION WASHINGTON - WNYNo service evidence
DC0000004JOINT BASE ANACOSTIA - BOLLINGCaptive supply
MD0150005WASHINGTON SUBURBAN SANITARY COMMISSIONNo service evidence
VA6013010ARLINGTON COUNTYNo service evidence
VA6059501FAIRFAX COUNTY WATER AUTHORITYNo service evidence
VA6510010ALEXANDRIA, CITY OFNo service evidence
El Paso, TX: 1 attributed, 9 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0710002EL PASO WATER UTILITIESRanked99.1 %NoneoverlaySystem Sourced747,168None
Rejected systems
PWSIDSystemReason
NM3529207LAKE SECTION WATER COMPANYNo service evidence
TX0710001TOWN OF ANTHONYNo service evidence
TX0710005HORIZON REGIONAL MUDNo service evidence
TX0710009GASLIGHT SQUARE MOBILE HOME PARKCaptive supply
TX0710020FORT BLISS MAIN POST AREANo service evidence
TX0710102QUAIL RUN MOBILE HOME PARKCaptive supply
TX0710154LOWER VALLEY WATER DISTRICTNo service evidence
TX0710186PASEO DEL ESTE MUD 1No service evidence
TX0710187EAST BIGGS WATER SYSTEMNo service evidence
Las Vegas, NV: 1 attributed, 8 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NV0000090LAS VEGAS VALLEY WATER DISTRICTRanked98.8 %NoneoverlaySystem Sourced1,539,277None
Rejected systems
PWSIDSystemReason
093200373Las Vegas Paiute Snow MountainNo service evidence
NV0000089JEAN UTILITY SERVICES INCNo service evidence
NV0000106EASTLAND HEIGHTS WATER ASSOCIATIONNo service evidence
NV0000124SUNRISE ACRES WATER ASSOCIATIONNo service evidence
NV0000129RANCHO COOPERATIVE WATER COMPANYNo service evidence
NV0000140LUNA VISTANo service evidence
NV0000142KYLE CANYON WATER DISTRICTNo service evidence
NV0000289SOUTHERN NEVADA WATER SYSTEMNo service evidence
Boston, MA: 1 attributed, 10 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MA3035000BOSTON WATER AND SEWER COMMISSION (MWRA)Ranked98.2 %NoneoverlaySystem Sourced675,647None
Rejected systems
PWSIDSystemReason
MA3046000BROOKLINE WATER AND SEWER DIVISIONNo service evidence
MA3049000CAMBRIDGE WATER DEPARTMENTNo service evidence
MA3073000DEDHAM WESTWOOD WATER DIST.No service evidence
MA3093000EVERETT WATER DEPT. (MWRA)No service evidence
MA3189000MILTON WATER DEPT. (MWRA)No service evidence
MA3199000NEEDHAM WATER DEPTNo service evidence
MA3207000NEWTON WATER DEPT. (MWRA)No service evidence
MA3248000REVERE WATER DIVISION (MWRA)No service evidence
MA3274000SOMERVILLE WATER DEPT. (MWRA)No service evidence
MA3346000WINTHROP WATER DIVISION, (MWRA)No service evidence
Detroit, MI: 1 attributed, 12 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MI0001800DETROIT CITY OFRanked83.6 %NoneoverlaySystem Sourced633,218None
Rejected systems
PWSIDSystemReason
MI0001730DEARBORNDearborn is a different city's distribution system.
MI0001740DEARBORN HEIGHTSNo service evidence
MI0002890GROSSE POINTE FARMSNo service evidence
MI0002900GROSSE POINTE PARKNo service evidence
MI0002920GROSSE POINTE WOODSNo service evidence
MI0002970HAMTRAMCKNo service evidence
MI0003140HIGHLAND PARKNo service evidence
MI0003870LINCOLN PARKNo service evidence
MI0004220MELVINDALENo service evidence
MI0005640REDFORD TOWNSHIPRedford Township is a different township's distribution system.
MI0005690RIVER ROUGENo service evidence
MI0005840ROYAL OAK TOWNSHIPNo service evidence
Louisville, KY: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
KY0560258LOUISVILLE WATER COMPANYRanked99.8 %NoneoverlaySystem Sourced806,997None
Rejected systems
PWSIDSystemReason
IN5210005INDIANA AMERICAN WATER - S. INDIANANo service evidence
IN5210016WATSON RURAL WATER COMPANYNo service evidence
KY0470393HARDIN COUNTY WATER DISTRICT #1No service evidence
KY0470990HARDIN CO. WATER DIST #1/FT. KNOXNo service evidence
Portland, OR: 1 attributed, 13 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OR4100657PORTLAND WATER BUREAURanked95.5 %NoneoverlaySystem Sourced666,200None
Rejected systems
PWSIDSystemReason
OR4100163CANBY REGENCYNo service evidence
OR4100217LAUREL ACRES WATER CO INCNo service evidence
OR4100289SEAVEY LOOP WATER COMPANYNo service evidence
OR4100409JEFFERSON MOBILE ACRESNo service evidence
OR4100528MILWAUKIE, CITY OFNo service evidence
OR4100635SUNRISE WATER AUTHORITYNo service evidence
OR4100638SOUTHWOOD PARK WATER DISTRICTNo service evidence
OR4100644BURLINGTON WATER DISTRICTNo service evidence
OR4100653PALATINE HILL WATER DISTRICTNo service evidence
OR4100660WEST SLOPE WATER DISTRICTNo service evidence
OR4100964WOODBURN MOBILE ESTATESCaptive supply
OR4101171TOTEM VILLAGE MHPCaptive supply
WA5391200VANCOUVER CITY OFNo service evidence
Memphis, TN: 1 attributed, 1 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TN0000450MEMPHIS LIGHT, GAS, & WATERRanked99.5 %NoneoverlaySystem Sourced659,500None
Rejected systems
PWSIDSystemReason
MS0170043WALLS WATER ASSN- LAKE FORESTNo service evidence
Baltimore, MD: 1 attributed, 1 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MD0300002CITY OF BALTIMORERanked99.8 %NoneoverlaySystem Sourced1,600,000None
Rejected systems
PWSIDSystemReason
MD0020017GLEN BURNIE-BROADNECKNo service evidence
Milwaukee, WI: 1 attributed, 7 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
WI2410100MILWAUKEE WATERWORKSRanked62.6 %NoneoverlaySystem Sourced626,000None
Rejected systems
PWSIDSystemReason
WI2410169CUDAHY WATERWORKSNo service evidence
WI2410172OAK CREEK WATERWORKSNo service evidence
WI2410595WEST ALLIS WATERWORKSNo service evidence
WI2410597WHITEFISH BAY WATERWORKSNo service evidence
WI2410602FRANKLIN MHPNo service evidence
WI2413515NORTH SHORE WATER COMMISSIONNo service evidence
WI4310284LAKEVIEW HEIGHTS MOBILE HOME PARKCaptive supply
Albuquerque, NM: 1 attributed, 14 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NM3510701ALBUQUERQUE WATER SYSTEMRanked98.3 %NoneoverlaySystem Sourced560,326None
Rejected systems
PWSIDSystemReason
NM3500432LOMA ESCONDIDA WATER ASSOCIATIONNo service evidence
NM3500532SENIOR LIVING SYSTEMS INC.No service evidence
NM3503401PAJARITO MESA MDWCANo service evidence
NM3510201SOUTH HILLS WATER COMPANYNo service evidence
NM3548501GREEN ACRES MOBILE HOME VILLAGECaptive supply
NM3548801HACIENDA DEL SOL #1No service evidence
NM3548901NORTH COURT MOBILE HOME PARKCaptive supply
NM3549101CHAMISA MOBILE HOME PARKCaptive supply
NM3562001HACIENDA DEL SOL #2Inactive
NM3562201SANDIA PEAK UTILITYNo service evidence
NM3567701KIRTLAND AIR FORCE BASECaptive supply
NM3573828NEW MEXICO BOYS AND GIRLS RANCHNo service evidence
NM3575501UNIVERSITY OF NEW MEXICOCaptive supply
NM3576623HOFHEINS/MARCEL THOMAS ASSOC COOP INCNo service evidence
Fresno, CA: 1 attributed, 17 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA1010007CITY OF FRESNORanked96.0 %NoneoverlaySystem Sourced545,970None
Rejected systems
PWSIDSystemReason
CA1000004BELMONT WATER CORPORATIONNo service evidence
CA1000023FCSA 14 - BELMONT MANORNo service evidence
CA1000039FCSA 10 - CUMORAH KNOLLSNo service evidence
CA1000078FCWWD 42/ALLUVIAL & FANCHERNo service evidence
CA1000229GREEN ACRES MOBILE HOME ESTATECaptive supply
CA1000238CAMDEN TRAILER PARKCaptive supply
CA1000298WOODWARD BLUFFS MHPCaptive supply
CA1000299THREE PALMS MOBILEHOME PARKInactive
CA1000430COUNTRYSIDE CARE CENTERNo service evidence
CA1000554FCSA 10A - MANSIONETTE ESTATESCaptive supply
CA1009039PAPPAS & CO (MENDOTA)No service evidence
CA1009147FARMING DInactive
CA1009232CC FARMS, LLC.No service evidence
CA1010003CITY OF CLOVISNo service evidence
CA1010042MALAGA COUNTY WATER DISTRICTNo service evidence
CA1010055FCSA 47 - QUAIL LAKE ESTATESCaptive supply
CA1010339CALIFORNIA STATE UNIVERSITY FRESNOCaptive supply
Tucson, AZ: 1 attributed, 41 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0410112TUCSON CITY OFRanked92.1 %NoneoverlaySystem Sourced732,906None
Rejected systems
PWSIDSystemReason
AZ0401047LORD AZ WATER 2 - WINCHESTER TRAILSNo service evidence
AZ0401054VERNON VALLEY WATER SYSTEMNo service evidence
AZ0402006BOWIE WIDNo service evidence
AZ0402009CLOUD NINE WATER COMPANYNo service evidence
AZ0402015DRAGOON WATER COMPANYNo service evidence
AZ0402029SOUTHLAND UTILITIES - GOLDEN ACRESNo service evidence
AZ0409091CANYON VISTA ESTATESCaptive supply
AZ0410006AVRA WATER COOP INCNo service evidence
AZ0410011RIO VIEJO WATERNo service evidence
AZ0410035VOYAGER WATER COMPANYNo service evidence
AZ0410060METROPOLITAN DWID - HUBNo service evidence
AZ0410076METROPOLITAN DWIDNo service evidence
AZ0410127SPANISH TRAIL WATER COMPANYNo service evidence
AZ0410138MARANA MUNICIPAL - AIRLINE LAMBERTNo service evidence
AZ0410152VALLE VERDE DEL NORTENo service evidence
AZ0410169TUCSON WATER CORONA DE TUCSONNo service evidence
AZ0410187FEDERAL CORRECTIONAL INSTCaptive supply
AZ0410329MARANA MUNICIPAL - HARTMAN VISTASNo service evidence
AZ0410357METROPOLITAN DWID - DIABLO VILLAGENo service evidence
AZ0410404ORACLE NORTH HOME OWNERS ASSOCInactive
AZ0410409LA CASITA WATER COMPANY 1No service evidence
AZ0410410LA CASITA WATER COMPANY 2No service evidence
AZ0411334SUNLAND WATER COMPANYNo service evidence
AZ0420019CAMPBELL ESTATES MHPCaptive supply
AZ0420026CRESCENT MANOR MHPCaptive supply
AZ0420033DESERT SHORES RV MHPCaptive supply
AZ0420042FAR HORIZONS MHPCaptive supply
AZ0420092SIERRA COURT MHC LLCNo service evidence
AZ0420096CROSSROADS PARK MHPCaptive supply
AZ0420175LOS ARBOLES MOBILE HOME PARKCaptive supply
AZ0420197CACTUS COUNTRY RV RESORTCaptive supply
AZ0420439VISTA DEL NORTE MHPCaptive supply
AZ0420443FAR HORIZONS EAST MHPCaptive supply
AZ0420487RIO VISTA MOBILE HOME PARKCaptive supply
AZ0420546DESERT PARADISE MHP LLCCaptive supply
AZ0420549USAF DAVIS MONTHAN AFBCaptive supply
AZ0420570MISSION PALMS APARTMENTSCaptive supply
AZ0420575CAMMIES FOOTHILLS VISTA MHCNo service evidence
AZ0420595SUMMIT WATER COOPNo service evidence
AZ0420602RINCON COUNTRY EAST RV PARKCaptive supply
AZ0420606LA CASITA WATER COMPANY 3No service evidence
Sacramento, CA: 1 attributed, 17 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3410020CITY OF SACRAMENTO MAINRanked99.0 %NoneoverlaySystem Sourced527,979None
Rejected systems
PWSIDSystemReason
CA3400107RIVER'S EDGE MARINA & RESORTCaptive supply
CA3400125FREEPORT MARINACaptive supply
CA3400156SOUTHWEST TRACT W M D [SWS]No service evidence
CA3400169SPINDRIFT MARINACaptive supply
CA3400179MC CLELLAN MHPCaptive supply
CA3400190IMPERIAL MANOR MOBILEHOME COMMUNITYCaptive supply
CA3400191ELEVEN OAKS MOBILE HOME COMMUNITYCaptive supply
CA3400296SAC CITY MOBILE HOME COMMUNITY LPCaptive supply
CA3400331WESTERNER MOBILE HOME PARKCaptive supply
CA3400397LAGUNA VILLAGE RV PARKCaptive supply
CA3400433EDGEWATER MOBILE HOME PARKCaptive supply
CA3410002SCWA - ARDEN PARK VISTANo service evidence
CA3410010CAL AM - SUBURBAN ROSEMONTNo service evidence
CA3410018RIO LINDA/ELVERTA COMMUNITY WATER DISTNo service evidence
CA3410026CALIFORNIA STATE FAIRNo service evidence
CA3410033FLORIN COUNTY WATER DISTRICTNo service evidence
CA5710003CITY OF WEST SACRAMENTONo service evidence
Atlanta, GA: 1 attributed, 5 rejected (confidence medium)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
GA1210001ATLANTARanked88.7 %NoneoverlaySystem Sourced1,089,893None
Rejected systems
PWSIDSystemReason
GA0670003COBB COUNTYNo service evidence
GA0890001DEKALB COUNTYDeKalb County's Water and Wastewater Master Plan summary (March 2022) states the county does not provide water service to the county land within the City of Atlanta boundary, which the City of Atlanta's system serves
GA1210006HAPEVILLENo service evidence
GA2110011APPALACHEE WOODS SUBDIVISIONCaptive supply
GA2110049MORGAN ESTATES SUBDIVISIONCaptive supply
Kansas City, MO: 1 attributed, 17 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MO1010415KANSAS CITY PWSRanked99.8 %NoneoverlaySystem Sourced553,295None
Rejected systems
PWSIDSystemReason
KS2009110WATER DISTRICT 1 OF JOHNSON CONo service evidence
KS2020906KANSAS CITY BOARD OF PUBLIC UTILITIESNo service evidence
MO1010061BELTON PWSNo service evidence
MO1010070BIRMINGHAM VILLAGE OF PWSNo service evidence
MO1010080BLUE SPRINGS PWSNo service evidence
MO1010307GLADSTONE PWSNo service evidence
MO1010399INDEPENDENCE PWSNo service evidence
MO1010466LIBERTY PWSNo service evidence
MO1010580NORTH KANSAS CITY PWSNo service evidence
MO1010675RAYMORE PWSNo service evidence
MO1010676RAYTOWN WATER COMPANYNo service evidence
MO1010842WEATHERBY LAKE PWSNo service evidence
MO1024114CASS COUNTY PWSD 2No service evidence
MO1024142CLAY COUNTY PWSD 2No service evidence
MO1024276JACKSON COUNTY PWSD 2No service evidence
MO1024478PLATTE CO PWSD 4No service evidence
MO1041651MIDWEST MHP LINDALE LLCCaptive supply
Mesa, AZ: 1 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0407095MESA CITY OFRanked98.5 %NoneoverlaySystem Sourced466,000None
Rejected systems
PWSIDSystemReason
AZ0407100TEMPE CITY OFNo service evidence
AZ0407671PEEKABOO WATER COOPNo service evidence
Raleigh, NC: 1 attributed, 24 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NC0392010RALEIGH, CITY OFRanked84.2 %NoneoverlaySystem Sourced650,000None
Rejected systems
PWSIDSystemReason
NC0392020CARY, TOWN OFNo service evidence
NC0392086WETHERBURN WOODSNo service evidence
NC0392094TRADEWINDS S/DNo service evidence
NC0392096RIVER OAKS S/DNo service evidence
NC0392117STEEPLECHASE S/DNo service evidence
NC0392128EMERALD VILLAGE S/DNo service evidence
NC0392155WAKEFIELD S/DNo service evidence
NC0392163RIVERVIEW NORTHNo service evidence
NC0392186ROYAL ACRES S/DNo service evidence
NC0392202WATKIN`S MHPCaptive supply
NC0392219ROUNDTREE S/DNo service evidence
NC0392225NEUSE RIVER VILLAGE MHPCaptive supply
NC0392251CAMBRIDGE S/DNo service evidence
NC0392261WOODSCREEK S/DNo service evidence
NC0392301VALLEY WOODS MHPCaptive supply
NC0392315WILLOW WINDS S/DNo service evidence
NC0392320BERKSHIRE DOWNSNo service evidence
NC0392351CROSS CREEK MHPCaptive supply
NC0392373BAYLEAF MASTERNo service evidence
NC0392386ROLLING RIDGE S/DNo service evidence
NC4392107CHESTERFIELD VILLAGENo service evidence
NC4392109BAY LAUREL S/DNo service evidence
NC4392186WILLOW HILLS S/DNo service evidence
NC4392192BAILEY`S LANDING S/DNo service evidence
Colorado Springs, CO: 1 attributed, 13 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CO0121150COLORADO SPRINGS UTILITIESRanked99.8 %NoneoverlaySystem Sourced464,111None
Rejected systems
PWSIDSystemReason
CO0121025ACADEMY WSDNo service evidence
CO0121125CHEROKEE MDNo service evidence
CO0121140COLORADO CENTRE MDNo service evidence
CO0121175DONALA WSDNo service evidence
CO0121247FALCON HIGHLANDS MDNo service evidence
CO0121325GARDEN VALLEYNo service evidence
CO0121352HOLIDAY VILLAGE MOBILE HOME COMMUNITYCaptive supply
CO0121525OVERLOOK MUTUAL WCNo service evidence
CO0121600PARK FORESTNo service evidence
CO0121710SHANGRILA MHPCaptive supply
CO0121775SECURITY WATER DISTRICTNo service evidence
CO0121900WIDEFIELD WSDNo service evidence
CO0221445US DEPARTMENT OF THE ARMY FORT CARSONNo service evidence
Miami, FL: 1 attributed, 7 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL4130871MDWASA - MAIN SYSTEMRanked100.0 %NoneoverlaySystem Sourced2,377,460None
Rejected systems
PWSIDSystemReason
FL4130604HIALEAH, CITY OFNo service evidence
FL4130662INDIAN CREEK VILLAGENo service evidence
FL4130901MIAMI BEACH, CITY OFNo service evidence
FL4131202MDWASA/REX UTILITIESNo service evidence
FL4131312SILVER PALM MOBILE HOMESNo service evidence
FL4131403AMERICANA VILLAGENo service evidence
FL4131558WEST MIAMI, CITY OFNo service evidence
Omaha, NE: 1 attributed, 9 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NE3105507METROPOLITAN UTILITIES DISTRICTRanked99.4 %NoneoverlaySystem Sourced660,000None
Rejected systems
PWSIDSystemReason
IA7812079CARTER LAKE WATER DISTRICTNo service evidence
IA7820080COUNCIL BLUFFS WATER WORKSNo service evidence
NE3105512DOUGLAS CO SID 258 - CARAT HOMESNo service evidence
NE3105514LAKELAND ESTATES WATER COMPANYCaptive supply
NE3120928MAPLEWOOD ESTATES MOBILE HOME PARKCaptive supply
NE3121363MEADOWBROOK ESTATES WATER SYSTEMCaptive supply
NE3121401SANDY POINTE LAKE DEVELOPMENTNo service evidence
NE3121527RIO VISTA MHPCaptive supply
NE3130005DOUGLAS CO SID 277 - THE FARMNo service evidence
Virginia Beach, VA: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
VA3810900VIRGINIA BEACH, CITY OFRanked94.2 %NoneoverlaySystem Sourced437,994None
Rejected systems
PWSIDSystemReason
NC0427010CURRITUCK COUNTY WATER SYSTEMNo service evidence
NC6027001SOUTHERN OUTER BANKS WTR SYSTNo service evidence
VA3095320GREENSPRINGS MOBILE VILLAGENo service evidence
VA3810340LITTLE CREEK AMPHIBIOUS BASE - U.S. NAVYCaptive supply
Long Beach, CA: 1 attributed, 6 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA1910065LONG BEACH UTILITIES DEPARTMENTRanked99.3 %NoneoverlaySystem Sourced466,772None
Rejected systems
PWSIDSystemReason
CA1910012BELLFLOWER HOME GARDEN WATER COMPANYNo service evidence
CA1910026COMPTON-CITY, WATER DEPT.No service evidence
CA1910105PARAMOUNT - CITY, WATER DEPT.No service evidence
CA1910161LIBERTY UTILITIES - LYNWOODNo service evidence
CA3010022GOLDEN STATE WC - WEST ORANGE COUNTYNo service evidence
CA3010041CITY OF SEAL BEACHNo service evidence
Oakland, CA: 1 attributed, 0 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA0110005EAST BAY MUDRanked100.0 %NoneoverlaySystem Sourced1,468,000None

No other system was found for this city.

Minneapolis, MN: 1 attributed, 11 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MN1270024MinneapolisRanked99.9 %NoneoverlaySystem Sourced425,300None
Rejected systems
PWSIDSystemReason
MN1020016Columbia HeightsNo service evidence
MN1020031FridleyNo service evidence
MN1270004Brooklyn CenterNo service evidence
MN1270011EdinaNo service evidence
MN1270014Golden ValleyNo service evidence
MN1270045RichfieldNo service evidence
MN1270046RobbinsdaleNo service evidence
MN1270048Saint Anthony VillageNo service evidence
MN1270050Saint Louis ParkNo service evidence
MN1550005Chosen Valley Mobile Home ParkCaptive supply
MN1620013RosevilleNo service evidence
Bakersfield, CA: 2 attributed, 26 rejected (confidence low)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA1510003CWS - BAKERSFIELDRanked49.1 %NoneoverlaySystem Sourced268,129None
CA1510031BAKERSFIELD, CITY OFSecondary38.7 %NoneoverlaySystem Sourced171,108None
Rejected systems
PWSIDSystemReason
CA1500096OLD RIVER MUTUAL WATER COMPANYNo service evidence
CA1500349STOCKDALE MUTUAL WATER CO.No service evidence
CA1500455WILLIAM FISHER MEMORIAL WATER COMPANYInactive
CA1500461FOUNTAIN TRAILER PARK WATERInactive
CA1500483ALLEN ROAD MUTUAL WATER SYSTEMNo service evidence
CA1500493EL ADOBE POA, INC.No service evidence
CA1500494WILSON ROAD WATER COMMUNITYNo service evidence
CA1500507ST. CLAIR RANCHOS MUTUAL WATER CO.No service evidence
CA1500544ENOS LANE PUBLIC UTILITY DISTRICTNo service evidence
CA1500546HARVEST MOON MUTUAL WATER CONo service evidence
CA1500555MUSTANG MUTUAL WATER SYSTEMNo service evidence
CA1500560KRANENBURG WATER SYSTEMNo service evidence
CA1500575SAN JOAQUIN ESTATES MUTUAL WATER COMPANYCaptive supply
CA1500585OASIS PROPERTY OWNERS ASSOCIATIONNo service evidence
CA1502320LERDO SHERIFF S FACILITYNo service evidence
CA1502383NORD ROAD WATER ASSOCIATIONNo service evidence
CA1502465PANAMA ROAD PROPERTY OWNERS ASSOCNo service evidence
CA1502545SCHWEIKART WATER SYSTEMNo service evidence
CA1502663TOWN & COUNTRY WATER COMPANYNo service evidence
CA1502699EAST WILSON ROAD WATER COMPANYNo service evidence
CA1503509THE ANNE SIPPI CLINIC-RIVERSIDE RANCHNo service evidence
CA1503526WINI MUTUAL WATER COMPANYNo service evidence
CA1510004CASA LOMA WATER CO, INC.Inactive
CA1510012LAMONT PUBLIC UTILITY DISTNo service evidence
CA1510019SHAFTER, CITY OFNo service evidence
CA1510022WEST KERN WATER DISTRICTNo service evidence
Tulsa, OK: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OK1020418TULSARanked97.0 %NoneoverlaySystem Sourced413,000None
Rejected systems
PWSIDSystemReason
OK1020420SAND SPRINGSNo service evidence
OK1021507ROGERS CO RWD # 5No service evidence
OK3007251CARRIAGE VILLAGENo service evidence
Tampa, FL: 1 attributed, 12 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL6290327CITY OF TAMPA WATER DEPARTMENTRanked95.1 %NoneoverlaySystem Sourced733,886None
Rejected systems
PWSIDSystemReason
FL3481518HIDDEN VALLEY MOBILE HOME PARKCaptive supply
FL3641315ENCORE-SUNSHINE HOLIDAY DAYTONA PARKNo service evidence
FL5084110NHC UTILITIESNo service evidence
FL6080324TROPICAL PALMS MHPCaptive supply
FL6290190MCN MOBILE HOME PARKCaptive supply
FL6290388HCWRC/NORTHWEST UTILITIESNo allocated population
FL6291372HCWRC/PEBBLE CREEK SUBDIVISIONCaptive supply
FL6291791CITY OF TEMPLE TERRACE UTILITYNo service evidence
FL6291882UNIVERSITY OF SOUTH FLORIDACaptive supply
FL6292081HCWRD/HERSHEL HEIGHTSNo service evidence
FL6521405PINELLAS COUNTY UTILITIESPinellas County Utilities is a different county's utility.
FL6521417OLDSMAR WATER SYSTEMNo service evidence
Aurora, CO: 1 attributed, 13 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CO0103005AURORA CITY OFRanked98.0 %NoneoverlaySystem Sourced533,407None
Rejected systems
PWSIDSystemReason
CO0101060GALAMBS MOBILE HOME AND RV PARKCaptive supply
CO0101065GREEN ACRES MHPCaptive supply
CO0101085HILLCREST VILLAGE MHPCaptive supply
CO0101234EASTERN ADAMS CO MDNo service evidence
CO0103040EAST VALLEY MDNo service evidence
CO0103050FOXRIDGE FARMS MHPCaptive supply
CO0103079STAGE RUN HOANo service evidence
CO0103090TRAVOIS HOANo service evidence
CO0103666RANGEVIEW MDNo service evidence
CO0116175CHERRY CREEK VALLEY WSDNo service evidence
CO0118020COTTONWOOD WSDNo service evidence
CO0118065SIERRA VISTA HOANo service evidence
CO0120003CLEARWATER MDNo service evidence
Arlington, TX: 1 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX2200001CITY OF ARLINGTONRanked99.9 %NoneoverlaySystem Sourced413,955None
Rejected systems
PWSIDSystemReason
TX2200012CITY OF FORT WORTHNo service evidence
TX2200017CITY OF KENNEDALENo service evidence
Wichita, KS: 1 attributed, 9 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
KS2017308WICHITA, CITY OFRanked88.7 %NoneoverlaySystem Sourced395,699None
Rejected systems
PWSIDSystemReason
KS2001519SIMMONS SUBDIVISION SANITATION SYSTEMCaptive supply
KS2007910PUBLIC WHOLESALE WSD 17No service evidence
KS2017303PARK CITY, CITY OFNo service evidence
KS2017304BEL AIRE, CITY OFNo service evidence
KS2017312THE HARBORInactive
KS2017318VALLEY CENTER, CITY OFNo service evidence
KS2017322HAYSVILLE, CITY OFNo service evidence
KS2017323MCCONNELL AFBCaptive supply
KS2017347CHISHOLM CREEK UTILITY AUTHORITYNo service evidence
Cleveland, OH: 1 attributed, 1 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OH1801212CLEVELAND PUBLIC WATER SYSTEMRanked100.0 %NoneoverlaySystem Sourced1,308,955None
Rejected systems
PWSIDSystemReason
OH1801003LAKEWOOD CITY PWSNo service evidence
New Orleans, LA: 2 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
LA1071009NEW ORLEANS CARROLLTON WATER WORKSRanked98.6 %84.0 % after NEW ORLEANS ALGIERS WATER WORKSoverlaySystem Sourced334,903None
LA1071001NEW ORLEANS ALGIERS WATER WORKSSecondary14.6 %Nonesdwis-population-servedNone52,785S&WB states Algiers Water Works serves the west bank of Orleans Parish (about 47,000 people); its Modeled polygon lies under Carrollton's System Sourced polygon, so the overlay gives it ~0%. The S&WB 2022 advisory's Plaquemines Parish mention is a portion of an industrial park, so the serves-only-this-city basis holds for residents.
Rejected systems
PWSIDSystemReason
LA1051003GRETNA WATERWORKSNo service evidence
LA1055015LAFAYETTE MHP LLCCaptive supply
Henderson, NV: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NV0000076HENDERSON CITY OFRanked99.3 %NoneoverlaySystem Sourced336,534None
Rejected systems
PWSIDSystemReason
NV0000147BERMUDA PALMS MANAGEMENT LLCNo service evidence
NV0002552ESCAPEE CO OP OF NEVADANo service evidence
NV0003028NELLIS AIR FORCE BASECaptive supply
Urban Honolulu, HI: 1 attributed, 1 rejected (confidence medium)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
HI0000331HNL-WINDWARD-PEARL HARBORRanked96.0 %NoneoverlayModeled631,389None
Rejected systems
PWSIDSystemReason
HI0000319KAMEHAMEHA SCHOOLSCaptive supply
Anaheim, CA: 1 attributed, 5 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3010001CITY OF ANAHEIMRanked98.9 %NoneoverlaySystem Sourced350,254None
Rejected systems
PWSIDSystemReason
CA3000519HYNES ESTATES MUTUAL WATER CO.Captive supply
CA3010022GOLDEN STATE WC - WEST ORANGE COUNTYNo service evidence
CA3010027CITY OF ORANGENo service evidence
CA3010035GOLDEN STATE WC - PLACENTIA/YORBA LINDANo service evidence
CA3010092IRVINE RANCH WATER DISTRICTNo service evidence
Orlando, FL: 1 attributed, 14 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL3480962ORLANDO UTILITIES COMMISSIONRanked94.1 %NoneoverlaySystem Sourced536,466None
Rejected systems
PWSIDSystemReason
FL3354106BEE'S RV RESORTCaptive supply
FL3354967WOLF BRANCH MEADOWSNo service evidence
FL3420904OAK PARK VILLAGENo service evidence
FL3480149PLURIS-WEDGEFIELD INCNo service evidence
FL3480265OCUD/DAETWYLER SHORES (CONSEC)No service evidence
FL3480409UNIVERSITY OF CENTRAL FLORIDACaptive supply
FL3481270STARLIGHT RANCH MOBILE HOME ESTATESCaptive supply
FL3484132OCUD/EASTERN WATER SYSTEM (2 WP)No allocated population
FL3484437FLAMINGO CROSSING (CONSEC.)No service evidence
FL3490751TOHO WATER AUTHORITY EASTERNNo service evidence
FL3491909LAKE TOHO RESORTCaptive supply
FL3494418SPRINGLAKE VILLAGE WTPInactive
FL6531697SPRING LAKE ESTATES LLCCaptive supply
FL6601345ISLEWORTHNo service evidence
Lexington-Fayette, KY: 1 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
KY0340250KENTUCKY-AMERICAN WATER CORanked92.0 %NoneoverlaySystem Sourced669,042None
Rejected systems
PWSIDSystemReason
KY0090287KENTUCKY AMERICAN WATER- MILLERSBURGInactive
KY0760224MADISON CO UTILITIES DISTRICTNo service evidence
Stockton, CA: 2 attributed, 25 rejected (confidence low)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3910012CITY OF STOCKTONRanked57.8 %NoneoverlaySystem Sourced192,702None
CA3910001CALIFORNIA WATER SERVICE - STOCKTONSecondary41.8 %NoneoverlaySystem Sourced182,775None
Rejected systems
PWSIDSystemReason
CA3900504CLEMENTS WATER WORKS #43No service evidence
CA3900543MAURLAND MANOR WATER SYSTEMNo service evidence
CA3900558RANCHO SAN JOAQUIN WATER SYSNo service evidence
CA3900561LODI LAKE MOBILE HOME PARKCaptive supply
CA3900596VILLA CEREZOSNo service evidence
CA3900624IL VINETONo service evidence
CA3900653ISLANDER MARINACaptive supply
CA3900682LOCKEFORD MOBILE HOME PARK WTR SYSCaptive supply
CA3900702CORRAL HOLLOW PWSNo service evidence
CA3900714SUNNYSIDE ESTATES WATER SYSTEMCaptive supply
CA3900719MOKELUMNE MOBILE SENIOR PARKNo service evidence
CA3900721WOODBRIDGE MOBILE ESTATESInactive
CA3900724ELKHORN ESTATES WATER SYSTEMCaptive supply
CA3900805MOREHEAD PARKNo service evidence
CA3900837LODI HOMESNo service evidence
CA3900844COUNTRY MANOR MHPCaptive supply
CA3900927SPRING CREEK ESTATES PWSCaptive supply
CA3901081MOBILE VILLAS TRAILER PARKCaptive supply
CA3901092SAN JOAQUIN WATER WORKS #2No service evidence
CA3901216SANTOS RANCH PWS #5-CSA #35No service evidence
CA3901348FAIROAKS PWS #44No service evidence
CA3910002SAN JOAQUIN COUNTY - COLONIAL HEIGHTSNo service evidence
CA3910014SAN JOAQUIN COUNTY-RAYMUS VILLAGENo service evidence
CA3910020STOCKTON VERDE MOBILE HOME PARKCaptive supply
CA3910023OAKWOOD LAKE WATER DISTRICT-SUBDIVISIONCaptive supply
Newark, NJ: 1 attributed, 9 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NJ0714001NEWARK WATER DEPARTMENTRanked100.0 %NoneoverlaySystem Sourced294,274None
Rejected systems
PWSIDSystemReason
NJ0701001BELLEVILLE WATER DEPTNo service evidence
NJ0702001BLOOMFIELD WATER DEPARTMENTNo service evidence
NJ0705001EAST ORANGE WATER COMMISSIONNo service evidence
NJ0712001NJ AMERICAN WATER - SHORT HILLSNo service evidence
NJ0719001SOUTH ORANGE WATER DEPARTMENTNo service evidence
NJ0904001HARRISON W DEPTNo service evidence
NJ0907001KEARNY WATER DEPARTMENTNo service evidence
NJ2004001NJ AMERICAN WATER - LIBERTYNo service evidence
NJ2004002NJ AMERICAN WATER - RARITANNo service evidence
Riverside, CA: 2 attributed, 7 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3310031RIVERSIDE, CITY OFRanked89.0 %NoneoverlaySystem Sourced302,776None
CA3310049WESTERN MWDSecondary10.9 %NoneoverlaySystem Sourced87,955None
Rejected systems
PWSIDSystemReason
CA3310004BOX SPRINGS MUTUAL WCNo service evidence
CA3310009EASTERN MUNICIPAL WDEastern Municipal Water District is not this place's water system.
CA3310021JURUPA COMMUNITY SDNo service evidence
CA3310025NORCO, CITY OFNo service evidence
CA3310037CORONA, CITY OFNo service evidence
CA3310044RUBIDOUX COMMUNITY SDNo service evidence
CA3610057RIVERSIDE HIGHLAND WATER COMPANYNo service evidence
Irvine, CA: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3010092IRVINE RANCH WATER DISTRICTRanked100.0 %NoneoverlaySystem Sourced450,323None
Rejected systems
PWSIDSystemReason
CA3010023CITY OF NEWPORT BEACHNo service evidence
CA3010038CITY OF SANTA ANANo service evidence
CA3010079EL TORO WATER DISTRICTNo service evidence
Corpus Christi, TX: 1 attributed, 9 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX1780003CITY OF CORPUS CHRISTIRanked97.0 %NoneoverlaySystem Sourced317,247None
Rejected systems
PWSIDSystemReason
TX1370028KING RANCH LAURELES DIVISIONNo service evidence
TX1780015VIOLET WSCNo service evidence
TX1780019GOLDEN ACRES WATERNo service evidence
TX2050002CITY OF INGLESIDENo service evidence
TX2050005CITY OF PORTLANDNo service evidence
TX2050011SAN PATRICIO MWDNo service evidence
TX2050015CITY OF ARANSAS PASSNo service evidence
TX2050071CITY OF INGLESIDE ON THE BAYNo service evidence
TX2050078RINCON WSCNo service evidence
Santa Ana, CA: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3010038CITY OF SANTA ANARanked99.9 %NoneoverlaySystem Sourced316,184None
Rejected systems
PWSIDSystemReason
CA3010004MESA WATER DISTRICTNo service evidence
CA3010027CITY OF ORANGENo service evidence
CA3010062CITY OF GARDEN GROVENo service evidence
CA3010069CITY OF FOUNTAIN VALLEYNo service evidence
Cincinnati, OH: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OH3102612CINCINNATI PUBLIC WATER SYSTEMRanked100.0 %NoneoverlaySystem Sourced800,000None
Rejected systems
PWSIDSystemReason
KY0590220NORTHERN KENTUCKY WATER DISTRICTNo service evidence
OH3101112INDIAN HILL CITY PWSNo service evidence
OH3101703NORWOOD CITY PWSNo service evidence
OH3101812READING CITY PWSNo service evidence
Greensboro, NC: 1 attributed, 18 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NC0241010GREENSBORO, CITY OFRanked94.7 %NoneoverlaySystem Sourced319,588None
Rejected systems
PWSIDSystemReason
NC0241030JAMESTOWN, TOWN OFNo service evidence
NC0241105CEDAR PARK MHPCaptive supply
NC0241106CIRCLE M MHPCaptive supply
NC0241111HUNTINGTON WOODS MHPCaptive supply
NC0241113OAK LANE MHPCaptive supply
NC0241193BON AIRE ACRESNo service evidence
NC0241237THE FARMS AT SUMMERFIELDNo service evidence
NC0415010SOUTH MILLS WATER ASSOCInactive
NC0416101BALLOU MHPCaptive supply
NC0416160ATLANTIC MHPCaptive supply
NC0416165SEA SCAPENo service evidence
NC0416166ATLANTIC MHP IICaptive supply
NC0416182RIVERSTONENo service evidence
NC0416186HUNTING ESTATESCaptive supply
NC0416192ATLANTIC VILLAGE MHPCaptive supply
NC0416198MERRIMON WATER SYSTEMNo service evidence
NC0416205HARMONY ESTATESCaptive supply
NC3041063SANFORDS CREEK SUBDIVISIONCaptive supply
Pittsburgh, PA: 2 attributed, 6 rejected (confidence medium)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
PA5020038PITTSBURGH WATER & SEWER AUTHRanked76.1 %NoneoverlaySystem Sourced520,000None
PA5020039PA AMER WATER CO-PITTSBURGHSecondary22.0 %NoneoverlaySystem Sourced686,000None
Rejected systems
PWSIDSystemReason
PA5020003ASPINWALL BORO WATER DEPTNo service evidence
PA5020031VA HEALTHCARE SYSTEM HEINZNo service evidence
PA5020040FOX CHAPEL AUTHNo service evidence
PA5020045ROBINSON TWP MUNI AUTHNo service evidence
PA5020047RESERVE TWP WATER DEPTNo service evidence
PA5650098FAIRFIELD MANOR MHPCaptive supply
St. Paul, MN: 1 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MN1620026Saint Paul Regional Water ServicesRanked98.3 %NoneoverlaySystem Sourced392,529None
Rejected systems
PWSIDSystemReason
MN1190020South Saint PaulNo service evidence
MN1270024MinneapolisNo service evidence
Durham, NC: 1 attributed, 12 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NC0332010DURHAM, CITY OFRanked95.7 %NoneoverlaySystem Sourced333,490None
Rejected systems
PWSIDSystemReason
NC0326140NEW TOWN APARTMENTS LLCCaptive supply
NC0326280EASTGATE SD FAYETTEVILLE PWCNo service evidence
NC0326286BRETTONWOOD HILLS S/DNo service evidence
NC0326300KELLY HILL S/DNo service evidence
NC0326342TANGLEWOOD ESTATES S/DCaptive supply
NC0326367TANGLEWOOD SOUTH MHPFAYETTEVILLE PWCNo service evidence
NC0332106WHISPERING PINES MHPCaptive supply
NC0332111GREYMOSS S/DNo service evidence
NC0332122CANTERBURY ESTATESCaptive supply
NC0332132TRAPPER`S CREEK S/DNo service evidence
NC0368010ORANGE WATER & SEWER AUTHORITYNo service evidence
NC0392010RALEIGH, CITY OFNo service evidence
Jersey City, NJ: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NJ0906001JERSEY CITY MUARanked100.0 %NoneoverlaySystem Sourced262,000None
Rejected systems
PWSIDSystemReason
NJ0238001VEOLIA WATER NEW JERSEY HACKENSACKNo service evidence
NJ0714001NEWARK WATER DEPARTMENTNo service evidence
NJ0901001CITY OF BAYONNENo service evidence
NJ0905001HOBOKEN WATER UTILITYNo service evidence
Lincoln, NE: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NE3110926LINCOLN, CITY OFRanked94.0 %NoneoverlaySystem Sourced296,000None
Rejected systems
PWSIDSystemReason
NE3120354COUNTRY ACRES SUBDIVISIONCaptive supply
NE3120712SOUTHFORK ESTATESCaptive supply
NE3120824CROOKED CREEK HOANo service evidence
NE3121507CONTEMPO MHPCaptive supply
North Las Vegas, NV: 1 attributed, 1 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NV0000175NORTH LAS VEGAS UTILITIESRanked99.6 %NoneoverlaySystem Sourced376,515None
Rejected systems
PWSIDSystemReason
NV0003028NELLIS AIR FORCE BASECaptive supply
Plano, TX: 1 attributed, 9 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0430007CITY OF PLANORanked100.0 %NoneoverlaySystem Sourced292,059None
Rejected systems
PWSIDSystemReason
TX0430005CITY OF FRISCONo service evidence
TX0430025CITY OF ALLENNo service evidence
TX0430042CITY OF MURPHYNo service evidence
TX0430045CITY OF PARKERNo service evidence
TX0430060AIR PARK ESTATESCaptive supply
TX0570004DALLAS WATER UTILITYNo service evidence
TX0570015CITY OF RICHARDSONNo service evidence
TX0570034CITY OF CARROLLTONNo service evidence
TX0610081CITY OF THE COLONYNo service evidence
Gilbert, AZ: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0407092GILBERT, TOWN OFRanked99.7 %NoneoverlaySystem Sourced247,600None
Rejected systems
PWSIDSystemReason
AZ0407033QUEEN CREEK TOWN OFNo service evidence
AZ0407090CHANDLER CITY OFNo service evidence
AZ0407095MESA CITY OFNo service evidence
AZ0407671PEEKABOO WATER COOPNo service evidence
Anchorage, AK: 1 attributed, 34 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AK2210906MOA MUNICIPALITY OF ANCHORAGERanked89.3 %NoneoverlaySystem Sourced221,351None
Rejected systems
PWSIDSystemReason
AK2210338GREEN ACRES TCCaptive supply
AK2210354INLET VIEW MHP CHUGIAKCaptive supply
AK2210419PENLAND PARK MHPCaptive supply
AK2210435RANGEVIEW TCCaptive supply
AK2210451RIVIERA TERRACE TCCaptive supply
AK2210574TOTEM TRAILER TOWN TCCaptive supply
AK2210689GLENCAREN COURTNo service evidence
AK2210778TROLL KNOLL S/DNo service evidence
AK2210794FOREST PARK TCCaptive supply
AK2210891SNOWCREST VIEW SOUTHNo service evidence
AK2211075OW DIMOND ESTATES TRAILER COURTCaptive supply
AK2211091SOUTH PARK ESTATE TCCaptive supply
AK2211130TRAILS END MHPCaptive supply
AK2211198ANCHORAGE SANDS APARTMENTSCaptive supply
AK2211619MAYFLOWER TCCaptive supply
AK2211677SOUTHWOOD MANOR TCCaptive supply
AK2211724G A PHILLIPS S/DNo service evidence
AK2211897KATHY O ESTATESCaptive supply
AK2211952WHITTIER WATER SYSTEMNo service evidence
AK2212128GOLDEN NUGGET RV PARK, MALASPINA MHPCaptive supply
AK2212267GLACIER VALLEY WATER COMPANYNo service evidence
AK2212461HILLSIDE PARK S/DNo service evidence
AK2212924COHOE SUBDIVISIONCaptive supply
AK2213297BIRCHWOOD MHPCaptive supply
AK2213336GLENN MULDOON TCCaptive supply
AK2213564SPRING FOREST HOMEOWNERS ASSN.No service evidence
AK2214007ALYESKA CHALET CONDOS HOACaptive supply
AK2215566HOMER DRIVE APTS.No service evidence
AK2216198MARANATHA WATER UTILITIESNo service evidence
AK2218630MANOOGS ISLE MOBILE HOME PARKCaptive supply
AK2218642NEAR POINT KNOLL SUBDIVISIONCaptive supply
AK2218653ALYESKA CREEKSIDE APARTMENTSCaptive supply
AK2227547MATANUSKA HEIGHTS DUCHESSNo service evidence
AK2298002MOUNTAIN VIEW APARTMENTSCaptive supply
Madison, WI: 1 attributed, 14 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
WI1130224MADISON WATER UTILITYRanked98.2 %NoneoverlaySystem Sourced272,000None
Rejected systems
PWSIDSystemReason
WI1130231FITCHBURG UTILITY DIST 1No service evidence
WI1130234MAPLE BLUFF WATERWORKSNo service evidence
WI1130235MENDOTA MENTAL HEALTH INSTNo service evidence
WI1130236SHOREWOOD HILLS WATERWORKSNo service evidence
WI1130241MCFARLAND WATERWORKSNo service evidence
WI1130242MIDDLETON WATERWORKSNo service evidence
WI1130244APPLEWOOD HILLNo service evidence
WI1130245MONONA WATERWORKSNo service evidence
WI1130258SUN PRAIRIE UTILITIESNo service evidence
WI1130259VERONA WATERWORKSNo service evidence
WI1132627PINE RIDGE APTSNo service evidence
WI1133471WOODBRIDGE ESTATESCaptive supply
WI1540115SHADY HILL MOBILE HOME PARKCaptive supply
WI1540118PIRATES COVE MOBILE HOME COMMUNITYCaptive supply
Reno, NV: 1 attributed, 14 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NV0000190TRUCKEE MEADOWS WATER AUTHORITYRanked99.1 %NoneoverlaySystem Sourced442,000None
Rejected systems
PWSIDSystemReason
093200369Hungry Valley (Reno-Sparks)No service evidence
093200379Reno Sparks Indian ColonyNo service evidence
NV0000035GRANDVIEW TERRACE WATER DISTRICTNo service evidence
NV0000054SAGE VALLEY PARK ANNEXNo service evidence
NV0000199KE TA MOBILE HOME PARKCaptive supply
NV0000280LARK MOBILE HOME PARKCaptive supply
NV0000282STEAMBOAT SPRINGS WATERWORKS INCNo service evidence
NV0000732MOUNT ROSE BOWL PROPERTY OWNERS WATER CONo service evidence
NV0000801STAMPMILLNo service evidence
NV0000865LIGHTNING WNo service evidence
NV0001086GREAT BASIN WATER CO SPANISH SPRINGSNo service evidence
NV0002023SAGE VALLEY MHP LLCNo service evidence
NV0002525SUNRISE ESTATESCaptive supply
NV0002526OLD WASHOE ESTATESCaptive supply
Chandler, AZ: 1 attributed, 12 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0407090CHANDLER CITY OFRanked99.7 %NoneoverlaySystem Sourced247,328None
Rejected systems
PWSIDSystemReason
AZ0404092HOUSTON CREEK PARKInactive
AZ0404324LAMPLIGHTER RV RESORTCaptive supply
AZ0407025PHOENIX CITY OFNo service evidence
AZ0407092GILBERT, TOWN OFNo service evidence
AZ0407095MESA CITY OFNo service evidence
AZ0407120PIMA UTILITIESNo service evidence
AZ0407286ALMA RANCHETTESInactive
AZ0407296GERMANN WATERInactive
AZ0407409CHANDLER HEIGHTS CITRUS IRRIGATION DISTNo service evidence
AZ0407671PEEKABOO WATER COOPNo service evidence
AZ0407903GILBERT RIGG WELL COOPNo service evidence
AZ0411062THE OAKS MOBILE HOME PARKCaptive supply
St. Louis, MO: 1 attributed, 1 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
MO6010715ST LOUIS CITY PWSRanked98.8 %NoneoverlaySystem Sourced304,709None
Rejected systems
PWSIDSystemReason
MO6048258QUAIL RUN OF IMPERIALNo service evidence
Chula Vista, CA: 2 attributed, 3 rejected (confidence low)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
CA3710034OTAY WATER DISTRICTRanked56.7 %NoneoverlaySystem Sourced242,155None
CA3710025SWEETWATER AUTHORITYSecondary42.3 %NoneoverlaySystem Sourced184,915None
Rejected systems
PWSIDSystemReason
090600158Viejas Community SystemNo service evidence
CA3710020SAN DIEGO, CITY OFNo service evidence
CA3710042SAN DIEGO COUNTY WATER AUTHORITYWholesale only
Fort Wayne, IN: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
IN5202020FORT WAYNE - 3 RIVERS FILTRATION PLANTRanked94.9 %NoneoverlaySystem Sourced269,994None
Rejected systems
PWSIDSystemReason
IN5202007HUNTERTOWN WATER WORKSNo service evidence
IN5202009NEW HAVEN WATER DEPARTMENTNo service evidence
IN5202012HONEYSUCKLE (FORT WAYNE UTILITIES)Inactive
IN5202018SUNNYMEDE COMMUNITY ASSOCIATION WATERNo service evidence
Buffalo, NY: 1 attributed, 8 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NY1400422BUFFALO WATER AUTHORITYRanked100.0 %NoneoverlaySystem Sourced276,000None
Rejected systems
PWSIDSystemReason
NY1404556TONAWANDA, TOWN WATER DEPT.No service evidence
NY1410142KENMORE VILLAGENo service evidence
NY1500281KEENE WDNo service evidence
NY1500282KEENE VALLEY WDNo service evidence
NY1500283CHESTERFIELD WDNo service evidence
NY1500295WADHAMS WDNo service evidence
NY1500296WESTPORT WDNo service evidence
NY1521744MAGIC PINES MHPCaptive supply
Lubbock, TX: 1 attributed, 16 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX1520002LUBBOCK PUBLIC WATER SYSTEMRanked99.7 %NoneoverlaySystem Sourced266,450None
Rejected systems
PWSIDSystemReason
TX1520026FAMILY COMMUNITY CENTER MHPCaptive supply
TX1520046WILDWOOD MOBILE HOME VILLAGECaptive supply
TX1520062PLOTT ACRESNo service evidence
TX1520067114TH STREET MOBILE HOME PARKCaptive supply
TX1520072TEXAS GIRLS AND BOYS RANCHNo service evidence
TX1520094TOWN NORTH VILLAGE WATER SYSTEMNo service evidence
TX1520106COX ADDITION WATER SYSTEMNo service evidence
TX1520149STORMLIGHT MOBILE HOME PARKCaptive supply
TX1520159NORTH UNIVERSITY ESTATESCaptive supply
TX1520192TERRELLS MOBILE HOME PARKCaptive supply
TX1520217CSWR SOUTHWEST GARDEN WATERNo service evidence
TX1520219CHRISTIAN LIFE CENTERNo service evidence
TX1520232WEST ROOSEVELT MOBILE HOME PARKCaptive supply
TX1520247COUNTRY VIEW MHPCaptive supply
TX1520292HEARTLAND HOUSENo service evidence
TX1520308CHIPPER POINT APARTMENTSCaptive supply
Laredo, TX: 1 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX2400001CITY OF LAREDORanked99.7 %NoneoverlaySystem Sourced260,046None
Rejected systems
PWSIDSystemReason
TX2400029WEBB COUNTY WATER DISPENSERNo service evidence
TX2400043LOS BOTINES WSCNo service evidence
Port St Lucie, FL: 1 attributed, 5 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL4560954PORT ST LUCIE UTILITIESRanked93.3 %NoneoverlaySystem Sourced224,485None
Rejected systems
PWSIDSystemReason
FL4431891MARTIN CO UTILITIESMartin County Utilities is a different county's utility.
FL4560490FT. PIERCE UTILITIES AUTHORITYNo service evidence
FL4565002HARBOUR RIDGENo service evidence
FL4565030RESERVE UTILITIESInactive
FL4565043SPANISH LAKES FAIRWAYSNo service evidence
St. Petersburg, FL: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL6521715ST PETERSBURG, CITY OFRanked99.3 %NoneoverlaySystem Sourced349,979None
Rejected systems
PWSIDSystemReason
FL3050108BREEZEWAY TRAILER PARKCaptive supply
FL6520705GULFPORT WATER SYSTEMNo service evidence
FL6531024FLORIDA PALMS ESTATE LLCNo service evidence
Toledo, OH: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
OH4801411TOLEDO CITY OFRanked94.5 %NoneoverlaySystem Sourced360,000None
Rejected systems
PWSIDSystemReason
OH4800911OREGON CITYNo service evidence
OH4801012WHISPERING WINDS MHCNo service evidence
OH8752812NORTHWESTERN W AND SD - TOLEDO SVC AREANo service evidence
Glendale, AZ: 1 attributed, 8 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0407093GLENDALE CITY OFRanked98.5 %NoneoverlaySystem Sourced234,766None
Rejected systems
PWSIDSystemReason
AZ0401018LIVCO WATER COMPANYNo service evidence
AZ0402110CS WINCHESTER WATER COMPANYNo service evidence
AZ0407070SUNRISE WATER COMPANYNo service evidence
AZ0407073TIERRA BUENA WATER COMPANYInactive
AZ0407305USAF LUKE AIR FORCE BASECaptive supply
AZ0407366HACIENDA DEL SOL MHPCaptive supply
AZ0407484OLIVE AVENUE HOANo service evidence
AZ0407500SURPRISE CITY OF - MOUNTAIN VISTANo service evidence
Winston-Salem, NC: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
NC0234010WINSTON-SALEM, CITY OFRanked100.0 %NoneoverlaySystem Sourced391,900None
Rejected systems
PWSIDSystemReason
NC0229025DAVIDSON WATER INCNo service evidence
NC0285010KING, CITY OFNo service evidence
NC0343104SHADY GROVE MHPCaptive supply
NC0347102401 MOBILE HOME PARKCaptive supply
Irving, TX: 1 attributed, 6 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0570050CITY OF IRVINGRanked100.0 %NoneoverlaySystem Sourced264,546None
Rejected systems
PWSIDSystemReason
TX0570004DALLAS WATER UTILITYNo service evidence
TX0570034CITY OF CARROLLTONNo service evidence
TX0570040CITY OF COPPELLNo service evidence
TX0570048CITY OF GRAND PRAIRIENo service evidence
TX2200012CITY OF FORT WORTHNo service evidence
TX2200013CITY OF GRAPEVINENo service evidence
Chesapeake, VA: 2 attributed, 2 rejected (confidence medium)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
VA3550051CITY OF CHESAPEAKE - NORTHWEST RIVER SYSRanked75.2 %NoneoverlaySystem Sourced165,240None
VA3550050CITY OF CHESAPEAKE - WESTERN BRANCH SYSSecondary11.8 %NoneoverlaySystem Sourced32,326None
Rejected systems
PWSIDSystemReason
NC0427010CURRITUCK COUNTY WATER SYSTEMNo service evidence
VA3550750ST. BRIDES CORRECTIONAL CENTERCaptive supply
Garland, TX: 1 attributed, 5 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0570010CITY OF GARLANDRanked99.9 %NoneoverlaySystem Sourced248,822None
Rejected systems
PWSIDSystemReason
TX0570004DALLAS WATER UTILITYNo service evidence
TX0570014CITY OF MESQUITENo service evidence
TX0570056CITY OF ROWLETTNo service evidence
TX0570057CITY OF SACHSENo service evidence
TX0570059TOWN OF SUNNYVALENo service evidence
Scottsdale, AZ: 1 attributed, 6 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AZ0407098SCOTTSDALE CITY OFRanked97.1 %NoneoverlaySystem Sourced241,361None
Rejected systems
PWSIDSystemReason
AZ0404400RIM COUNTRY ESTATES MHPCaptive supply
AZ0407008BERNEIL WATER COMPANYNo service evidence
AZ0407015CAREFREE WATER COMPANYNo service evidence
AZ0407016CAVE CREEK WATERNo service evidence
AZ0407076TONTO HILLS DWIDNo service evidence
AZ0407100TEMPE CITY OFNo service evidence
Boise, ID: 1 attributed, 23 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
ID4010016VEOLIA WATER IDAHORanked97.1 %NoneoverlaySystem Sourced264,978None
Rejected systems
PWSIDSystemReason
ID3140060H AND L PARKNo service evidence
ID3140061LAKEYS CAFE AND TRAILER PARKCaptive supply
ID3370035PIONEER MOBILE HOME PARK LLCCaptive supply
ID4010005ANDERSON CIRCLE WATER CORPNo service evidence
ID4010062FLYING H TRAILER RANCHCaptive supply
ID4010064FRANKLIN DOMESTIC WATER USERSNo service evidence
ID4010066GARDEN CITY WATER AND SEWER SYSTEMNo service evidence
ID4010068AMY TRAILER PARKCaptive supply
ID4010071HAMPTON HOMES HOME OWNERS ASSNNo service evidence
ID4010083KLUGHERZ WATER CORPNo service evidence
ID4010088LINDA VISTA MOBILE HOME PARKCaptive supply
ID4010092MALAD AND HILTON WATER COMPANY INC.No service evidence
ID4010106NORTH HILLS MOBILE VILLAGENo service evidence
ID4010111PARADISE ESTATES WATER CORPCaptive supply
ID4010121RILEY TRAILER PARKCaptive supply
ID4010126RUSTIC ACRES MOBILE HOME PARKCaptive supply
ID4010139STANLEY POND INCNo service evidence
ID4010158WEST MEADOWS ESTATESCaptive supply
ID4010161WYMOSA WATER ASSN INCNo service evidence
ID4010178KRIZVIEW PARKNo service evidence
ID4010253WILLOWTREE ESTATES HOMEOWNER ASSOCIATIONCaptive supply
ID4200010CANYON CREEK MOBILE HOME PARKCaptive supply
ID4200073MOUNTAIN SAGENo service evidence
Richmond, VA: 1 attributed, 3 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
VA4760100RICHMOND, CITY OFRanked98.7 %NoneoverlaySystem Sourced233,655None
Rejected systems
PWSIDSystemReason
VA3800880WHALEYVILLE WATER WKSNo service evidence
VA4041845CHESTERFIELD CO CENTRAL WATER SYSTEMNo service evidence
VA4145200FOUNDERS BRIDGENo service evidence
Frisco, TX: 1 attributed, 8 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0430005CITY OF FRISCORanked99.9 %NoneoverlaySystem Sourced231,910None
Rejected systems
PWSIDSystemReason
TX0430007CITY OF PLANONo service evidence
TX0610035TOWN OF LITTLE ELMNo service evidence
TX0610036MUSTANG SUDNo service evidence
TX0610051BOYD ACRES WATER SYSTEMNo service evidence
TX0610081CITY OF THE COLONYNo service evidence
TX0610091CITY OF HACKBERRYNo service evidence
TX0610163SARATOGA ESTATESCaptive supply
TX0610253FRISCO WEST WCIDNo service evidence
Cape Coral, FL: 1 attributed, 5 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
FL5360325CAPE CORAL, CITY OFRanked61.8 %NoneoverlaySystem Sourced172,693None
Rejected systems
PWSIDSystemReason
FL4431870J ; S FISH CAMPNo service evidence
FL5084082CHARLOTTE CORRECTIONAL INSTITUTIONCaptive supply
FL5084100CHARLOTTE COUNTY UTILITIESNo service evidence
FL5364040LAKE FAIRWAYS MOBILE HOME PARKCaptive supply
FL5364152MOBILE MANOR MOBILE HOME PARKCaptive supply
McKinney, TX: 1 attributed, 4 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
TX0430039CITY OF MCKINNEYRanked99.2 %NoneoverlaySystem Sourced224,043None
Rejected systems
PWSIDSystemReason
TX0430005CITY OF FRISCONo service evidence
TX0430009TOWN OF PROSPERNo service evidence
TX0430040CITY OF MELISSANo service evidence
TX0430077NORTH CUSTER ROAD PLANTNo service evidence
Huntsville, AL: 1 attributed, 2 rejected (confidence high)
Attributed systems
PWSIDSystemRoleShare of cityAdjusted shareBasisBoundarySDWIS populationNote
AL0000882HUNTSVILLE UTILITIES WATER DEPT.Ranked90.7 %NoneoverlaySystem Sourced310,107None
Rejected systems
PWSIDSystemReason
AL0000905TRIANA WATER WORKSNo service evidence
AL0001084DECATUR, MUNICIPAL UB OFNo service evidence

Population and Census conventions

The 100 cities and their populations come from Census table SUB-IP-EST2025-ANNRNK, population estimates for July 1, 2025 (Vintage 2025). A city's population is the Census estimate, never a water system's population served.

The last city included is #100 Huntsville, AL (233,627); the first excluded is #101 Norfolk, VA (231,013).

Conventions applied to individual cities

  • Indianapolis: consolidated-city balance (FUNCSTAT F).
  • Nashville: consolidated-city balance (FUNCSTAT F).
  • Washington: FUNCSTAT N.
  • Louisville: consolidated-city balance (FUNCSTAT F).
  • Urban Honolulu: CDP (FUNCSTAT S), included by Census in SUB-IP-EST2025-ANNRNK; we follow the table.
  • The boundary is #100 Huntsville, AL (233,627); #101 Norfolk, VA (231,013) is excluded.
  • Norfolk wholesales water to Virginia Beach and Chesapeake (Sources: va-virginia-beach-2025-ccr-boundary, va-chesapeake-2025-ccr-boundary).
Census sources (2)
  • U.S. Census Bureau (2026). City and Town Population Totals: 2020-2025, dataset sub-est2025.csv. Vintage 2025.
  • U.S. Census Bureau (2026). Annual Estimates of the Resident Population for Incorporated Places of 20,000 or More, Ranked by July 1, 2025 Population (SUB-IP-EST2025-ANNRNK). Vintage 2025.

The formula

Pillar weights are a stated judgement of how severe and how certain each harm is at US tap levels, informed by the evidence below. They are not a derived risk model.

Each pillar is scored from 0 to 100, where 100 is best: a burden b between 0 and 1 gives 100 ร— (1 โˆ’ b). The score is the weighted mean of the four pillar scores, ฮฃ weight ร— pillar score / 100, reported to one decimal. A ratio to a benchmark is capped at 2 times the benchmark, so one extreme value cannot dominate.

Pillar weights and sub-weights
PillarWeightSub-weights
Lead30C1 18, C2 12
PFAS25B1 20, B2 5
Other regulated contaminants25
EPA compliance history20D1 15, D2 5
  • Lead. C1: share = (lead + galvanized requiring replacement + unknown ร— state ratio) / all lines, and b = min(share / 0.25, 1). C2: b = min(PB90 / 10 ยตg/L, 2) / 2.
  • PFAS. B1: r = the higher of the PFOA and PFOS location means / 4 ng/L. B2: r = the largest of HI / 1, PFHxS / 10, PFNA / 10, HFPO-DA / 10. For each, b = min(r, 2) / 2.
  • Other regulated contaminants. For each detected contaminant, r = min(level / benchmark, 2), where the benchmark is the MCLG when it is above zero and the MCL otherwise; b = min(ฮฃ tier factor ร— r / 2, 1). A contaminant not listed as detected adds nothing.
  • EPA compliance history. D1: b = min(n / 3, 1), where n counts distinct records in the health-based categories (hb-mcl, hb-tt, hb-mrdl) that began in the 5-year window. Only a record in category hb-mcl can be left out of n: it is left out when its contaminant is one pillar A scored for the system or one pillar B scores, and it began in the CCR year scored. D2: b = quarters with at least one monitoring, reporting, notice or other record / 20. A record covers the quarters from the start of its compliance period through the quarter of its printed end date. A record with no printed end date that EPA lists as resolved, with a return-to-compliance date inside the window, counts through that date's quarter. Any other record with no printed end date, including one still open, counts through the last quarter of the window.

The parameters were pre-registered on 2026-10-24, before the first scoring run on real data, as inputs/score-params.json with hash sha256:ee0d537c67f2527bc9861b15cde72a80873b75f2c5926919173ace5c5c3cc2ce; acknowledgement recorded 2026-10-24. A later change is stated below, and the parameter file stays as registered.

We first computed results on real data on 2026-10-24. Every rule deciding a score, rank, tier, flag or sensitivity result that we changed or set after that run is listed here, with its effect. A corrected data row is not a rule change; corrections made after publication are in the corrections log below.

  1. 2026-10-25. Details the plan left open for the named sensitivity scenarios, such as how weights rescale, were set before the first sensitivity report. Effect: No score, rank, tier or flag changed. These details do set the scenario results below.
  2. 2026-10-25. Red flag (a): a violation is open unless EPA lists it as Resolved. A calculated return date alone no longer closes it. Effect: Baltimore and Laredo gained flag (a). No score, rank or tier changed.
  3. 2026-10-25. Violations under rules EPA marks as not federally regulated are out of scope. Effect: No value changed: the file we score holds none. A second EPA source lists 20 in 4 cities, and they are not counted.
  4. 2026-10-25. Pillar A treats two labels as one plant when they differ only in case, accents, spacing or punctuation. Effect: No score, rank, tier or flag changed.
  5. 2026-10-25. A CCR result's statistic is what its printed label says, including a footnote defining the value. A note on how compliance is judged does not change it, and a label naming two statistics counts as reported. Effect: No score, rank or tier changed. The statistic shown changed in 9 cities.
  6. 2026-10-28. A lead result from a period ending before 2023 is replaced by the newest lead result in the system's CCR, if newer. Effect: Honolulu only: its lead period, flags and sources changed. Its score, rank and tier did not.
  7. 2026-10-28. A CCR lead 90th percentile printed as not detected, with no reporting limit, scores 0. Effect: Honolulu only: its value was already 0, so no score changed.
  8. 2026-10-29. If one source in a CCR gives a contaminant a statistic ranked above a single-sample high, a source printing only that high no longer competes. Effect: Scores rose in Albuquerque, St. Louis, Oakland, Milwaukee and Sacramento, and Oakland lost flag (b). Alone, this would have moved 75 cities, at most 32 places. With 3 data-row corrections the same day, 80 cities changed rank and 13 changed tier.
  9. 2026-11-05. D2 counts a record with no printed end date that EPA lists as resolved through the quarter of its return date, not to the end of the window. EPA lists those records as resolved, so counting them to the end of the window overstated how long they lasted. Effect: The D2 quarter count of 21 cities changed, so 69 cities changed rank, by at most 14 places, and 7 changed tier. The earlier rule is comparison S-d2BlankEndToWindow in the sensitivity analysis. It is not a pre-registered scenario and does not affect the rank ranges.
Every pre-registered parameter (403 values)

Red flag (c)'s rule name and label are left out of this table; the rules below state flag (c) in full. References to our working decision log and documents are also left out, here only: the registered file itself is unchanged.

#ParameterValue
1weights.C30.
2weights.B25.
3weights.A25.
4weights.D20.
5subWeights.C.C118.
6subWeights.C.C212.
7subWeights.B.B120.
8subWeights.B.B25.
9subWeights.D.D115.
10subWeights.D.D25.
11anchors.S_cap.value0.25.
12anchors.S_cap.status"proposed".
13anchors.K.value2.
14anchors.K.status"proposed".
15anchors.N_cap.value3.
16anchors.N_cap.status"proposed".
17ratioCap2.
18pb90.anchor.value10.
19pb90.anchor.unit"ยตg/L".
20pb90.zero"as-reported".
21pb90.monitoringPeriodInProgress"recorded-value-no-imputation".
22pfas.anchor.value4.
23pfas.anchor.unit"ng/L".
24pfas.b2Terms.HI.divisor1.
25pfas.b2Terms.HI.unit"unitless".
26pfas.b2Terms.PFHxS.divisor10.
27pfas.b2Terms.PFHxS.unit"ng/L".
28pfas.b2Terms.PFNA.divisor10.
29pfas.b2Terms.PFNA.unit"ng/L".
30pfas.b2Terms.HFPO-DA.divisor10.
31pfas.b2Terms.HFPO-DA.unit"ng/L".
32censoring.baseline"halfMrl".
33censoring.scenarios["zero","mrl"].
34lsl.unit"share".
35lsl.unknown"unknown-times-rho-state".
36lsl.methods.not-published-state-ratio"share-equals-rho-state".
37lsl.methods.published-counts-unusable-state-ratio"share-equals-rho-state".
38otherContaminants.benchmark"mclg-if-positive-else-mcl".
39otherContaminants.tiers.values.1-1-1-trichloroethane0.5.
40otherContaminants.tiers.values.1-1-2-trichloroethane0.5.
41otherContaminants.tiers.values.1-1-dichloroethylene0.5.
42otherContaminants.tiers.values.1-2-4-trichlorobenzene0.5.
43otherContaminants.tiers.values.1-2-dichlorobenzene0.5.
44otherContaminants.tiers.values.1-2-dichloroethane0.5.
45otherContaminants.tiers.values.1-2-dichloropropane0.5.
46otherContaminants.tiers.values.1-4-dichlorobenzene0.5.
47otherContaminants.tiers.values.2-3-7-8-tcdd0.5.
48otherContaminants.tiers.values.2-4-d0.5.
49otherContaminants.tiers.values.alachlor0.5.
50otherContaminants.tiers.values.antimony0.5.
51otherContaminants.tiers.values.arsenic1.
52otherContaminants.tiers.values.asbestos0.5.
53otherContaminants.tiers.values.atrazine0.5.
54otherContaminants.tiers.values.barium0.5.
55otherContaminants.tiers.values.benzene0.5.
56otherContaminants.tiers.values.benzo-a-pyrene0.5.
57otherContaminants.tiers.values.beryllium0.5.
58otherContaminants.tiers.values.beta-particles-and-photon-emitters0.5.
59otherContaminants.tiers.values.bis-2-ethylhexyl-adipate0.5.
60otherContaminants.tiers.values.bis-2-ethylhexyl-phthalate0.5.
61otherContaminants.tiers.values.bromate0.5.
62otherContaminants.tiers.values.cadmium0.5.
63otherContaminants.tiers.values.carbofuran0.5.
64otherContaminants.tiers.values.carbon-tetrachloride0.5.
65otherContaminants.tiers.values.chlordane-mixture-of-isomers0.5.
66otherContaminants.tiers.values.chlorite0.5.
67otherContaminants.tiers.values.chlorobenzene0.5.
68otherContaminants.tiers.values.chloroform0.6.
69otherContaminants.tiers.values.chromium-total0.5.
70otherContaminants.tiers.values.cis-1-2-dichloroethylene0.5.
71otherContaminants.tiers.values.cyanide0.5.
72otherContaminants.tiers.values.dalapon0.5.
73otherContaminants.tiers.values.dibromochloromethane0.6.
74otherContaminants.tiers.values.dibromochloropropane0.5.
75otherContaminants.tiers.values.dichloromethane0.5.
76otherContaminants.tiers.values.dinoseb0.5.
77otherContaminants.tiers.values.diquat0.5.
78otherContaminants.tiers.values.endothall0.5.
79otherContaminants.tiers.values.endrin0.5.
80otherContaminants.tiers.values.ethylbenzene0.5.
81otherContaminants.tiers.values.ethylene-dibromide0.5.
82otherContaminants.tiers.values.glyphosate0.5.
83otherContaminants.tiers.values.gross-alpha0.4.
84otherContaminants.tiers.values.haa50.6.
85otherContaminants.tiers.values.heptachlor0.5.
86otherContaminants.tiers.values.heptachlor-epoxide0.5.
87otherContaminants.tiers.values.hexachlorobenzene0.5.
88otherContaminants.tiers.values.hexachlorocyclopentadiene0.5.
89otherContaminants.tiers.values.lindane0.5.
90otherContaminants.tiers.values.mercury0.5.
91otherContaminants.tiers.values.methoxychlor0.5.
92otherContaminants.tiers.values.monochloroacetic-acid0.6.
93otherContaminants.tiers.values.nitrate.belowMcl0.5.
94otherContaminants.tiers.values.nitrate.atOrAboveMcl1.
95otherContaminants.tiers.values.nitrate-as-no3.belowMcl0.5.
96otherContaminants.tiers.values.nitrate-as-no3.atOrAboveMcl1.
97otherContaminants.tiers.values.nitrite.belowMcl0.5.
98otherContaminants.tiers.values.nitrite.atOrAboveMcl1.
99otherContaminants.tiers.values.nitrite-and-nitrate.belowMcl0.5.
100otherContaminants.tiers.values.nitrite-and-nitrate.atOrAboveMcl1.
101otherContaminants.tiers.values.oxamyl0.5.
102otherContaminants.tiers.values.pentachlorophenol0.5.
103otherContaminants.tiers.values.picloram0.5.
104otherContaminants.tiers.values.polychlorinated-biphenyls0.5.
105otherContaminants.tiers.values.radium-226-2280.4.
106otherContaminants.tiers.values.selenium0.5.
107otherContaminants.tiers.values.silvex0.5.
108otherContaminants.tiers.values.simazine0.5.
109otherContaminants.tiers.values.styrene0.5.
110otherContaminants.tiers.values.tetrachloroethylene0.5.
111otherContaminants.tiers.values.thallium0.5.
112otherContaminants.tiers.values.toluene0.5.
113otherContaminants.tiers.values.toxaphene0.5.
114otherContaminants.tiers.values.trans-1-2-dichloroethylene0.5.
115otherContaminants.tiers.values.trichloroacetic-acid-tca0.6.
116otherContaminants.tiers.values.trichloroethylene0.5.
117otherContaminants.tiers.values.tthms0.6.
118otherContaminants.tiers.values.uranium0.4.
119otherContaminants.tiers.values.vinyl-chloride0.5.
120otherContaminants.tiers.values.xylenes-total0.5.
121otherContaminants.tiers.values.radium-2260.4.
122otherContaminants.tiers.values.radium-2280.4.
123otherContaminants.tiers.status"proposed".
124otherContaminants.excludedFromA.lead"pillar C".
125otherContaminants.excludedFromA.copper"pillar C".
126otherContaminants.excludedFromA.pfoa"pillar B".
127otherContaminants.excludedFromA.pfos"pillar B".
128otherContaminants.excludedFromA.pfhxs"pillar B".
129otherContaminants.excludedFromA.pfna"pillar B".
130otherContaminants.excludedFromA.hfpo-da"pillar B".
131otherContaminants.excludedFromA.pfas-hazard-index"pillar B".
132otherContaminants.excludedFromA.total-pfas"pillar B".
133otherContaminants.excludedFromA.chlorine"MRDL disinfectant residual".
134otherContaminants.excludedFromA.chloramine"MRDL disinfectant residual".
135otherContaminants.excludedFromA.chlorine-dioxide"MRDL disinfectant residual".
136otherContaminants.excludedFromA.total-coliform"microbial/TT, outside inorganic/organic MCL analytes; counted through violations".
137otherContaminants.excludedFromA.e-coli"MCL under 40 CFR 141.63(c) (RTCR); not scored in Pillar A; raises flag (b) on a reported violation".
138otherContaminants.excludedFromA.turbidity"microbial/TT, outside inorganic/organic MCL analytes; counted through violations".
139otherContaminants.context.chromium-60.
140otherContaminants.context.fluoride0.
141otherContaminants.context.radon0.
142otherContaminants.context.hardness0.
143otherContaminants.context.iron0.
144otherContaminants.context.manganese0.
145otherContaminants.context.sulfate0.
146otherContaminants.context.chloride0.
147otherContaminants.context.total-dissolved-solids0.
148otherContaminants.context.zinc0.
149otherContaminants.context.ph0.
150otherContaminants.context.aldicarb0.
151otherContaminants.context.aldicarb-sulfone0.
152otherContaminants.context.aldicarb-sulfoxide0.
153otherContaminants.notes["Lithium has no benchmark or CCR canonical id; it remains a documented context note, not a classification key.","The three aldicarb entries have postponed MCLs; context only.","CcrRow.statistic names the statistic; CcrMeasure describes the physical measure."].
154otherContaminants.complianceStatistics.values.1-1-1-trichloroethane["rlaa","average","max","reported"].
155otherContaminants.complianceStatistics.values.1-1-2-trichloroethane["rlaa","average","max","reported"].
156otherContaminants.complianceStatistics.values.1-1-dichloroethylene["rlaa","average","max","reported"].
157otherContaminants.complianceStatistics.values.1-2-4-trichlorobenzene["rlaa","average","max","reported"].
158otherContaminants.complianceStatistics.values.1-2-dichlorobenzene["rlaa","average","max","reported"].
159otherContaminants.complianceStatistics.values.1-2-dichloroethane["rlaa","average","max","reported"].
160otherContaminants.complianceStatistics.values.1-2-dichloropropane["rlaa","average","max","reported"].
161otherContaminants.complianceStatistics.values.1-4-dichlorobenzene["rlaa","average","max","reported"].
162otherContaminants.complianceStatistics.values.2-3-7-8-tcdd["rlaa","average","max","reported"].
163otherContaminants.complianceStatistics.values.2-4-d["rlaa","average","max","reported"].
164otherContaminants.complianceStatistics.values.alachlor["rlaa","average","max","reported"].
165otherContaminants.complianceStatistics.values.antimony["rlaa","average","max","reported"].
166otherContaminants.complianceStatistics.values.arsenic["rlaa","average","max","reported"].
167otherContaminants.complianceStatistics.values.asbestos["rlaa","average","max","reported"].
168otherContaminants.complianceStatistics.values.atrazine["rlaa","average","max","reported"].
169otherContaminants.complianceStatistics.values.barium["rlaa","average","max","reported"].
170otherContaminants.complianceStatistics.values.benzene["rlaa","average","max","reported"].
171otherContaminants.complianceStatistics.values.benzo-a-pyrene["rlaa","average","max","reported"].
172otherContaminants.complianceStatistics.values.beryllium["rlaa","average","max","reported"].
173otherContaminants.complianceStatistics.values.beta-particles-and-photon-emitters["rlaa","average","max","reported"].
174otherContaminants.complianceStatistics.values.bis-2-ethylhexyl-adipate["rlaa","average","max","reported"].
175otherContaminants.complianceStatistics.values.bis-2-ethylhexyl-phthalate["rlaa","average","max","reported"].
176otherContaminants.complianceStatistics.values.bromate["rlaa","average","max","reported"].
177otherContaminants.complianceStatistics.values.cadmium["rlaa","average","max","reported"].
178otherContaminants.complianceStatistics.values.carbofuran["rlaa","average","max","reported"].
179otherContaminants.complianceStatistics.values.carbon-tetrachloride["rlaa","average","max","reported"].
180otherContaminants.complianceStatistics.values.chlordane-mixture-of-isomers["rlaa","average","max","reported"].
181otherContaminants.complianceStatistics.values.chlorite["rlaa","average","max","reported"].
182otherContaminants.complianceStatistics.values.chlorobenzene["rlaa","average","max","reported"].
183otherContaminants.complianceStatistics.values.chloroform["rlaa","average","max","reported"].
184otherContaminants.complianceStatistics.values.chromium-total["rlaa","average","max","reported"].
185otherContaminants.complianceStatistics.values.cis-1-2-dichloroethylene["rlaa","average","max","reported"].
186otherContaminants.complianceStatistics.values.cyanide["rlaa","average","max","reported"].
187otherContaminants.complianceStatistics.values.dalapon["rlaa","average","max","reported"].
188otherContaminants.complianceStatistics.values.dibromochloromethane["rlaa","average","max","reported"].
189otherContaminants.complianceStatistics.values.dibromochloropropane["rlaa","average","max","reported"].
190otherContaminants.complianceStatistics.values.dichloromethane["rlaa","average","max","reported"].
191otherContaminants.complianceStatistics.values.dinoseb["rlaa","average","max","reported"].
192otherContaminants.complianceStatistics.values.diquat["rlaa","average","max","reported"].
193otherContaminants.complianceStatistics.values.endothall["rlaa","average","max","reported"].
194otherContaminants.complianceStatistics.values.endrin["rlaa","average","max","reported"].
195otherContaminants.complianceStatistics.values.ethylbenzene["rlaa","average","max","reported"].
196otherContaminants.complianceStatistics.values.ethylene-dibromide["rlaa","average","max","reported"].
197otherContaminants.complianceStatistics.values.glyphosate["rlaa","average","max","reported"].
198otherContaminants.complianceStatistics.values.gross-alpha["rlaa","average","max","reported"].
199otherContaminants.complianceStatistics.values.haa5["highest-lraa","rlaa","average","max","reported"].
200otherContaminants.complianceStatistics.values.heptachlor["rlaa","average","max","reported"].
201otherContaminants.complianceStatistics.values.heptachlor-epoxide["rlaa","average","max","reported"].
202otherContaminants.complianceStatistics.values.hexachlorobenzene["rlaa","average","max","reported"].
203otherContaminants.complianceStatistics.values.hexachlorocyclopentadiene["rlaa","average","max","reported"].
204otherContaminants.complianceStatistics.values.lindane["rlaa","average","max","reported"].
205otherContaminants.complianceStatistics.values.mercury["rlaa","average","max","reported"].
206otherContaminants.complianceStatistics.values.methoxychlor["rlaa","average","max","reported"].
207otherContaminants.complianceStatistics.values.monochloroacetic-acid["rlaa","average","max","reported"].
208otherContaminants.complianceStatistics.values.nitrate["max","rlaa","average","reported"].
209otherContaminants.complianceStatistics.values.nitrate-as-no3["max","rlaa","average","reported"].
210otherContaminants.complianceStatistics.values.nitrite["max","rlaa","average","reported"].
211otherContaminants.complianceStatistics.values.nitrite-and-nitrate["max","rlaa","average","reported"].
212otherContaminants.complianceStatistics.values.oxamyl["rlaa","average","max","reported"].
213otherContaminants.complianceStatistics.values.pentachlorophenol["rlaa","average","max","reported"].
214otherContaminants.complianceStatistics.values.picloram["rlaa","average","max","reported"].
215otherContaminants.complianceStatistics.values.polychlorinated-biphenyls["rlaa","average","max","reported"].
216otherContaminants.complianceStatistics.values.radium-226-228["rlaa","average","max","reported"].
217otherContaminants.complianceStatistics.values.selenium["rlaa","average","max","reported"].
218otherContaminants.complianceStatistics.values.silvex["rlaa","average","max","reported"].
219otherContaminants.complianceStatistics.values.simazine["rlaa","average","max","reported"].
220otherContaminants.complianceStatistics.values.styrene["rlaa","average","max","reported"].
221otherContaminants.complianceStatistics.values.tetrachloroethylene["rlaa","average","max","reported"].
222otherContaminants.complianceStatistics.values.thallium["rlaa","average","max","reported"].
223otherContaminants.complianceStatistics.values.toluene["rlaa","average","max","reported"].
224otherContaminants.complianceStatistics.values.toxaphene["rlaa","average","max","reported"].
225otherContaminants.complianceStatistics.values.trans-1-2-dichloroethylene["rlaa","average","max","reported"].
226otherContaminants.complianceStatistics.values.trichloroacetic-acid-tca["rlaa","average","max","reported"].
227otherContaminants.complianceStatistics.values.trichloroethylene["rlaa","average","max","reported"].
228otherContaminants.complianceStatistics.values.tthms["highest-lraa","rlaa","average","max","reported"].
229otherContaminants.complianceStatistics.values.uranium["rlaa","average","max","reported"].
230otherContaminants.complianceStatistics.values.vinyl-chloride["rlaa","average","max","reported"].
231otherContaminants.complianceStatistics.values.xylenes-total["rlaa","average","max","reported"].
232otherContaminants.complianceStatistics.values.radium-226["rlaa","average","max","reported"].
233otherContaminants.complianceStatistics.values.radium-228["rlaa","average","max","reported"].
234otherContaminants.complianceStatistics.status"proposed".
235otherContaminants.uraniumPciL.factor0.67.
236otherContaminants.uraniumPciL.unit"pCi/ยตg".
237otherContaminants.uraniumPciL.sourceId"ecfr-40-cfr-141-2026-10-15".
238otherContaminants.radium.combinedId"radium-226-228".
239otherContaminants.radium.isotopeIds["radium-226","radium-228"].
240otherContaminants.radium.unit"pCi/L".
241otherContaminants.radium.rule"sum-paired-isotopes".
242otherContaminants.radium.missingIsotope"not-detected".
243otherContaminants.radium.mcl.value5.
244otherContaminants.radium.mcl.source"inputs/benchmarks.json#radium-226-228: effective.mcl (40 CFR 141.66(b)), unit pCi/L".
245violations.unit"count".
246violations.windowYears5.
247violations.contaminantCodeMap.2950"tthms".
248violations.contaminantCodeMap.8000null.
249violations.d1.categories["hb-mcl","hb-tt","hb-mrdl"].
250violations.d1.dedup.scope"hb-mcl".
251violations.d1.dedup.contaminant"scored-in-A-or-B-for-system".
252violations.d1.dedup.date"violation-begin-year".
253violations.d1.dedup.ccrYear"resolved-ccr-year".
254violations.d2.measure"quarter-coverage".
255violations.d2.quarters20.
256violations.d2.categories["mr","pn","lcr-reporting","other"].
257violations.d2.lcrReportingCodes["2E","57"].
258ties.decimalPlaces1.
259ties.rounding"half-up".
260ties.significantDigits12.
261ties.shareRanktrue.
262ties.order["fewer-D1","lower-PB90","larger-Census-population"].
263tiers.measure"monte-carlo-median-rank".
264tiers.bandSize20.
265tiers.count5.
266tiers.redFlagDemotion.from1.
267tiers.redFlagDemotion.to2.
268headline.status"proposed".
269headline.cityCount100.
270headline.rankRangeConfidence0.9.
271headline.rangeWidthGreaterThan10.
272headline.cityCountGreaterThan30.
273headline.unstable"tiers-lead".
274headline.otherwise"ranks-lead".
275redFlags.a.rule"open-unresolved-health-based-at-cutoff".
276redFlags.a.label"open or unresolved health-based violation at cutoff".
277redFlags.b.rule"ccr-mcl-exceedance".
278redFlags.b.valueRuleScope.value"registered-compliance-statistic-only".
279redFlags.b.valueRuleScope.status"proposed".
280redFlags.b.mclClassification.values.arsenic.class"benchmark-mcl".
281redFlags.b.mclClassification.values.nitrate.class"benchmark-mcl".
282redFlags.b.mclClassification.values.nitrite.class"benchmark-mcl".
283redFlags.b.mclClassification.values.lead.class"no-mcl".
284redFlags.b.mclClassification.values.copper.class"no-mcl".
285redFlags.b.mclClassification.values.uranium.class"benchmark-mcl".
286redFlags.b.mclClassification.values.fluoride.class"benchmark-mcl".
287redFlags.b.mclClassification.values.selenium.class"benchmark-mcl".
288redFlags.b.mclClassification.values.barium.class"benchmark-mcl".
289redFlags.b.mclClassification.values.antimony.class"benchmark-mcl".
290redFlags.b.mclClassification.values.cadmium.class"benchmark-mcl".
291redFlags.b.mclClassification.values.chromium-total.class"benchmark-mcl".
292redFlags.b.mclClassification.values.mercury.class"benchmark-mcl".
293redFlags.b.mclClassification.values.thallium.class"benchmark-mcl".
294redFlags.b.mclClassification.values.beryllium.class"benchmark-mcl".
295redFlags.b.mclClassification.values.cyanide.class"benchmark-mcl".
296redFlags.b.mclClassification.values.atrazine.class"benchmark-mcl".
297redFlags.b.mclClassification.values.pfoa.class"benchmark-mcl".
298redFlags.b.mclClassification.values.pfos.class"benchmark-mcl".
299redFlags.b.mclClassification.values.radium-226-228.class"benchmark-mcl".
300redFlags.b.mclClassification.values.gross-alpha.class"benchmark-mcl".
301redFlags.b.mclClassification.values.tthms.class"benchmark-mcl".
302redFlags.b.mclClassification.values.haa5.class"benchmark-mcl".
303redFlags.b.mclClassification.values.chlorine.class"no-mcl".
304redFlags.b.mclClassification.values.chloramine.class"no-mcl".
305redFlags.b.mclClassification.values.total-coliform.class"no-mcl".
306redFlags.b.mclClassification.values.e-coli.class"mcl-without-numeric-benchmark".
307redFlags.b.mclClassification.values.e-coli.source"40 CFR 141.63(c)".
308redFlags.b.mclClassification.values.iron.class"no-mcl".
309redFlags.b.mclClassification.values.manganese.class"no-mcl".
310redFlags.b.mclClassification.values.sulfate.class"no-mcl".
311redFlags.b.mclClassification.values.chloride.class"no-mcl".
312redFlags.b.mclClassification.values.total-dissolved-solids.class"no-mcl".
313redFlags.b.mclClassification.values.zinc.class"no-mcl".
314redFlags.b.mclClassification.values.ph.class"no-mcl".
315redFlags.b.mclClassification.values.hardness.class"no-mcl".
316redFlags.b.mclClassification.values.chromium-6.class"no-mcl".
317redFlags.b.mclClassification.values.radon.class"no-mcl".
318redFlags.b.mclClassification.values.total-pfas.class"no-mcl".
319redFlags.b.mclClassification.values.turbidity.class"no-mcl".
320redFlags.b.mclClassification.values.radium-226.class"benchmark-mcl".
321redFlags.b.mclClassification.values.radium-228.class"benchmark-mcl".
322redFlags.b.mclClassification.values.1-1-1-trichloroethane.class"benchmark-mcl".
323redFlags.b.mclClassification.values.1-1-2-trichloroethane.class"benchmark-mcl".
324redFlags.b.mclClassification.values.1-1-dichloroethylene.class"benchmark-mcl".
325redFlags.b.mclClassification.values.1-2-4-trichlorobenzene.class"benchmark-mcl".
326redFlags.b.mclClassification.values.1-2-dichlorobenzene.class"benchmark-mcl".
327redFlags.b.mclClassification.values.1-2-dichloroethane.class"benchmark-mcl".
328redFlags.b.mclClassification.values.1-2-dichloropropane.class"benchmark-mcl".
329redFlags.b.mclClassification.values.1-4-dichlorobenzene.class"benchmark-mcl".
330redFlags.b.mclClassification.values.2-3-7-8-tcdd.class"benchmark-mcl".
331redFlags.b.mclClassification.values.2-4-d.class"benchmark-mcl".
332redFlags.b.mclClassification.values.alachlor.class"benchmark-mcl".
333redFlags.b.mclClassification.values.aldicarb.class"no-mcl".
334redFlags.b.mclClassification.values.aldicarb-sulfone.class"no-mcl".
335redFlags.b.mclClassification.values.aldicarb-sulfoxide.class"no-mcl".
336redFlags.b.mclClassification.values.asbestos.class"benchmark-mcl".
337redFlags.b.mclClassification.values.benzene.class"benchmark-mcl".
338redFlags.b.mclClassification.values.benzo-a-pyrene.class"benchmark-mcl".
339redFlags.b.mclClassification.values.beta-particles-and-photon-emitters.class"benchmark-mcl".
340redFlags.b.mclClassification.values.bis-2-ethylhexyl-adipate.class"benchmark-mcl".
341redFlags.b.mclClassification.values.bis-2-ethylhexyl-phthalate.class"benchmark-mcl".
342redFlags.b.mclClassification.values.bromate.class"benchmark-mcl".
343redFlags.b.mclClassification.values.carbofuran.class"benchmark-mcl".
344redFlags.b.mclClassification.values.carbon-tetrachloride.class"benchmark-mcl".
345redFlags.b.mclClassification.values.chlordane-mixture-of-isomers.class"benchmark-mcl".
346redFlags.b.mclClassification.values.chlorine-dioxide.class"no-mcl".
347redFlags.b.mclClassification.values.chlorite.class"benchmark-mcl".
348redFlags.b.mclClassification.values.chlorobenzene.class"benchmark-mcl".
349redFlags.b.mclClassification.values.chloroform.class"no-mcl".
350redFlags.b.mclClassification.values.cis-1-2-dichloroethylene.class"benchmark-mcl".
351redFlags.b.mclClassification.values.dalapon.class"benchmark-mcl".
352redFlags.b.mclClassification.values.dibromochloromethane.class"no-mcl".
353redFlags.b.mclClassification.values.dibromochloropropane.class"benchmark-mcl".
354redFlags.b.mclClassification.values.dichloromethane.class"benchmark-mcl".
355redFlags.b.mclClassification.values.dinoseb.class"benchmark-mcl".
356redFlags.b.mclClassification.values.diquat.class"benchmark-mcl".
357redFlags.b.mclClassification.values.endothall.class"benchmark-mcl".
358redFlags.b.mclClassification.values.endrin.class"benchmark-mcl".
359redFlags.b.mclClassification.values.ethylbenzene.class"benchmark-mcl".
360redFlags.b.mclClassification.values.ethylene-dibromide.class"benchmark-mcl".
361redFlags.b.mclClassification.values.glyphosate.class"benchmark-mcl".
362redFlags.b.mclClassification.values.heptachlor.class"benchmark-mcl".
363redFlags.b.mclClassification.values.heptachlor-epoxide.class"benchmark-mcl".
364redFlags.b.mclClassification.values.hexachlorobenzene.class"benchmark-mcl".
365redFlags.b.mclClassification.values.hexachlorocyclopentadiene.class"benchmark-mcl".
366redFlags.b.mclClassification.values.hfpo-da.class"benchmark-mcl".
367redFlags.b.mclClassification.values.lindane.class"benchmark-mcl".
368redFlags.b.mclClassification.values.methoxychlor.class"benchmark-mcl".
369redFlags.b.mclClassification.values.monochloroacetic-acid.class"no-mcl".
370redFlags.b.mclClassification.values.nitrate-as-no3.class"benchmark-mcl".
371redFlags.b.mclClassification.values.nitrite-and-nitrate.class"benchmark-mcl".
372redFlags.b.mclClassification.values.oxamyl.class"benchmark-mcl".
373redFlags.b.mclClassification.values.pentachlorophenol.class"benchmark-mcl".
374redFlags.b.mclClassification.values.pfas-hazard-index.class"benchmark-mcl".
375redFlags.b.mclClassification.values.pfhxs.class"benchmark-mcl".
376redFlags.b.mclClassification.values.pfna.class"benchmark-mcl".
377redFlags.b.mclClassification.values.picloram.class"benchmark-mcl".
378redFlags.b.mclClassification.values.polychlorinated-biphenyls.class"benchmark-mcl".
379redFlags.b.mclClassification.values.silvex.class"benchmark-mcl".
380redFlags.b.mclClassification.values.simazine.class"benchmark-mcl".
381redFlags.b.mclClassification.values.styrene.class"benchmark-mcl".
382redFlags.b.mclClassification.values.tetrachloroethylene.class"benchmark-mcl".
383redFlags.b.mclClassification.values.toluene.class"benchmark-mcl".
384redFlags.b.mclClassification.values.toxaphene.class"benchmark-mcl".
385redFlags.b.mclClassification.values.trans-1-2-dichloroethylene.class"benchmark-mcl".
386redFlags.b.mclClassification.values.trichloroacetic-acid-tca.class"no-mcl".
387redFlags.b.mclClassification.values.trichloroethylene.class"benchmark-mcl".
388redFlags.b.mclClassification.values.vinyl-chloride.class"benchmark-mcl".
389redFlags.b.mclClassification.values.xylenes-total.class"benchmark-mcl".
390redFlags.b.mclClassification.status"proposed".
391redFlags.b.ccrYear"resolved-ccr-year".
392redFlags.b.label"CCR-reported MCL exceedance in {ccrYear}".
393redFlags.c.lcrActionLevel.value15.
394redFlags.c.lcrActionLevel.unit"ยตg/L".
395redFlags.d.rule"pfoa-or-pfos-location-mean-above-anchor".
396redFlags.d.label"above a 2024 PFAS limit (not yet enforceable; compliance from 2029)".
397sensitivity.weights.distribution"uniform".
398sensitivity.weights.relativePlusMinus0.25.
399sensitivity.weights.renormalisetrue.
400sensitivity.weights.subWeights"fixed".
401sensitivity.draws10000.
402sensitivity.seed20261022.
403sensitivity.scenarios["S-equal","S-lead40","S-rescission","S-noDBP","S-HBonly","S-noViol","S-cens0","S-censMRL","S-lslNonlead","S-lslLead","S-viol3y","S-dlr","S-stale","S-blend","S-geo","S-noFlag","S-d2BeginQuarter"].

How we handled missing, low and tied results, tiers and red flags

Censoring: a PFAS result below the minimum reporting level counts as half the minimum reporting level in the baseline; the sensitivity analysis re-ranks with each of zero and the minimum reporting level instead. That baseline lowers the PFAS score of a system with no PFAS reported, so the gaps named for each city count only PFAS points lost below that score.

Service-line imputation: unknown lines count in proportion to the state's ratio of lead and galvanized-requiring-replacement lines to all known lines, from EPA's 2025 needs-survey update. A system whose inventory is not published, or whose counts cannot be used, is treated as all unknown, so its share equals the state ratio. An inventory with unknown lines is never read as having no lead lines.

Missing inputs: nothing is filled in silently. A city missing any input below is not ranked and is listed on the ranking page with the reason; a missing 2025 report falls back to the 2024 report first.

  • census: Census city input missing.
  • attribution: Reviewed system attribution missing.
  • ucmr5: UCMR5 input missing.
  • pb90: PB90 input missing.
  • violations: Violations input missing.
  • ccr: No 2025 or 2024 CCR; no committed state sample-DB input.

Ties: scores compare at 1 decimal place, rounded half up, and equal scores share a rank. Within a tie, rows are ordered by fewer health-based records, lower 90th-percentile lead and larger Census population.

Tiers: each city's tier comes from its median rank across the weight draws, in 5 bands of 20 ranks. A city with a red flag cannot sit in Tier 1 and moves to Tier 2.

Headline rule: if more than 30 of the 100 cities have a 90 % rank range wider than 10 places, the ranking leads with tiers, otherwise with ranks. In this edition 42 cities did, so the ranking leads with tiers.

Red flags: a system with any of these flags cannot be placed in Tier 1, whatever its score.

  • Open or unresolved health-based violation at the end of the violations data window. Set when a record in a health-based category (hb-mcl, hb-tt, hb-mrdl) began on or before 2026-09-30, the end of the violations data window, and had not returned to compliance by that date.
  • CCR-reported MCL exceedance in the CCR year scored. Set when the Consumer Confidence Report for the CCR year scored marks a violation for a contaminant with a federal MCL, including one whose MCL is not a number (e-coli), or when a compliance statistic the score reads from that report is strictly above the MCL the report prints.
  • 90th-percentile lead result over the federal lead trigger in force for its period. Set when the 90th-percentile lead result (PB90) is strictly over the federal lead trigger in force for its sample period: 15 ยตg/L for a period that began before 2027-11-01, and 10 ยตg/L for a period that began on or after it.
  • Above a 2024 PFAS limit (not yet enforceable; compliance from 2029). Set when the system's highest PFOA or PFOS location mean, with results below the minimum reporting level counted as half the minimum reporting level, is strictly above 4 ng/L.

Systems scored from an unnamed statistic

When a water quality report prints a level without naming its statistic, pillar A falls back to that reported value. These 137 system entries across 27 contaminants used it.

ContaminantSystems
1-1-dichloroethyleneBoise, ID (ID4010016); Reno, NV (NV0000190)
antimonyJacksonville, FL (FL2161328); Reno, NV (NV0000190)
arsenicChandler, AZ (AZ0407090); Sacramento, CA (CA3410020); Jacksonville, FL (FL2161328); Boise, ID (ID4010016); Durham, NC (NC0332010); Reno, NV (NV0000190); Fort Worth, TX (TX2200012)
atrazineBoise, ID (ID4010016); Durham, NC (NC0332010); Columbus, OH (OH2504412); Fort Worth, TX (TX2200012)
bariumChandler, AZ (AZ0407090); Cape Coral, FL (FL5360325); Jacksonville, FL (FL2161328); Orlando, FL (FL3480962); Port St Lucie, FL (FL4560954); St. Petersburg, FL (FL6521715); Boise, ID (ID4010016); Lexington-Fayette, KY (KY0340250); Durham, NC (NC0332010); Newark, NJ (NJ0714001); Reno, NV (NV0000190); Columbus, OH (OH2504412); Pittsburgh, PA (PA5020038); Fort Worth, TX (TX2200012); Richmond, VA (VA4760100)
bis-2-ethylhexyl-phthalateFort Worth, TX (TX2200012)
bromateOakland, CA (CA0110005); Columbus, OH (OH2504412); Fort Worth, TX (TX2200012)
cadmiumDurham, NC (NC0332010); Columbus, OH (OH2504412)
carbon-tetrachlorideSt. Petersburg, FL (FL6521715); Lexington-Fayette, KY (KY0340250)
chromium-totalChandler, AZ (AZ0407090); Jacksonville, FL (FL2161328); Boise, ID (ID4010016); Durham, NC (NC0332010); Reno, NV (NV0000190)
cyanideJacksonville, FL (FL2161328); Cleveland, OH (OH1801212); Fort Worth, TX (TX2200012)
dalaponSt. Petersburg, FL (FL6521715); Durham, NC (NC0332010); Greensboro, NC (NC0241010)
dichloromethaneBoise, ID (ID4010016)
gross-alphaLong Beach, CA (CA1910065); Oakland, CA (CA0110005); Cape Coral, FL (FL5360325); Jacksonville, FL (FL2161328); Orlando, FL (FL3480962); St. Petersburg, FL (FL6521715); Boise, ID (ID4010016); Lexington-Fayette, KY (KY0340250); Reno, NV (NV0000190); Tulsa, OK (OK1020418); Arlington, TX (TX2200001); Houston, TX (TX1010013); Richmond, VA (VA4760100)
haa5Cape Coral, FL (FL5360325); St. Paul, MN (MN1620026); Greensboro, NC (NC0241010); Raleigh, NC (NC0392010); Reno, NV (NV0000190); Cleveland, OH (OH1801212); Columbus, OH (OH2504412); Pittsburgh, PA (PA5020038); Fort Worth, TX (TX2200012)
hexachlorocyclopentadieneBoise, ID (ID4010016); New Orleans, LA (LA1071009); Reno, NV (NV0000190)
mercurySt. Petersburg, FL (FL6521715); Durham, NC (NC0332010); Reno, NV (NV0000190)
nitrateChandler, AZ (AZ0407090); Sacramento, CA (CA3410020); Cape Coral, FL (FL5360325); Jacksonville, FL (FL2161328); Orlando, FL (FL3480962); Port St Lucie, FL (FL4560954); St. Petersburg, FL (FL6521715); Boise, ID (ID4010016); Lexington-Fayette, KY (KY0340250); St. Paul, MN (MN1620026); Durham, NC (NC0332010); Reno, NV (NV0000190); Cleveland, OH (OH1801212); Columbus, OH (OH2504412); Toledo, OH (OH4801411); Pittsburgh, PA (PA5020038); Fort Worth, TX (TX2200012)
nitriteSt. Petersburg, FL (FL6521715); Lexington-Fayette, KY (KY0340250); Durham, NC (NC0332010)
nitrite-and-nitrateNew Orleans, LA (LA1071009); Richmond, VA (VA4760100)
radium-226-228Cape Coral, FL (FL5360325); Jacksonville, FL (FL2161328); Orlando, FL (FL3480962); St. Petersburg, FL (FL6521715); Tampa, FL (FL6290327); Boise, ID (ID4010016); Lexington-Fayette, KY (KY0340250); New Orleans, LA (LA1071009); Reno, NV (NV0000190); Tulsa, OK (OK1020418); Arlington, TX (TX2200001); Richmond, VA (VA4760100)
seleniumChandler, AZ (AZ0407090); Jacksonville, FL (FL2161328); Port St Lucie, FL (FL4560954); Boise, ID (ID4010016); Reno, NV (NV0000190)
simazineDurham, NC (NC0332010); Columbus, OH (OH2504412)
tetrachloroethyleneBoise, ID (ID4010016); Reno, NV (NV0000190)
trichloroethyleneReno, NV (NV0000190)
tthmsCape Coral, FL (FL5360325); St. Paul, MN (MN1620026); Greensboro, NC (NC0241010); Raleigh, NC (NC0392010); Reno, NV (NV0000190); Cleveland, OH (OH1801212); Columbus, OH (OH2504412); Pittsburgh, PA (PA5020038); Fort Worth, TX (TX2200012)
uraniumLong Beach, CA (CA1910065); Boise, ID (ID4010016); Reno, NV (NV0000190); Tulsa, OK (OK1020418); Fort Worth, TX (TX2200012); Houston, TX (TX1010013)

Contaminants above their health goal

The ranking table shows, for each ranked system, how many contaminants it has above their federal health goal, the maximum contaminant level goal (MCLG). The count is descriptive: it is not part of the score.

A contaminant counts when its value is strictly above its MCLG. The MCLG is the federal one, from our benchmark table of the Code of Federal Regulations; an MCLG printed in a water quality report is never used.

Where the MCLG is zero, a contaminant counts only when a quantified detection, a value above zero, is recorded. A non-detect counts as zero, so it never counts.

The values are the ones the score reads: 78 contaminants from Consumer Confidence Reports in pillar A, after the same choice of statistic; the 90th-percentile lead result of pillar C; and pillar B's UCMR 5 terms (GenX, PFAS mixture Hazard Index, Perfluorohexanesulfonic acid, Perfluorononanoic acid, Perfluorooctanoic acid and Perfluorooctanesulfonic acid), each with non-detects at zero rather than at half the minimum reporting level as the score counts them.

As of 2026-11-09, 40 CFR part 141 subpart F, which sets the federal MCLGs, does not list Total Haloacetic Acids (HAA5) and Total THMs, so they are measured but never counted.

An MCLG is a non-enforceable health goal, not a legal limit. Exceeding one is not itself a violation of any drinking water rule, and it is not a diagnosis of harm to anyone who drinks the water.

Contaminants the count reads, with their federal MCLG
ContaminantRead fromMCLGCitation
1,1,1 TrichloroethaneConsumer Confidence Report (pillar A)0.2 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
1,1,2 TrichloroethaneConsumer Confidence Report (pillar A)0.003 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
1,1 DichloroethyleneConsumer Confidence Report (pillar A)0.007 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
1,2,4 TrichlorobenzeneConsumer Confidence Report (pillar A)0.07 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
1,2 DichlorobenzeneConsumer Confidence Report (pillar A)0.6 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
1,2 DichloroethaneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
1,2 DichloropropaneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
1,4 DichlorobenzeneConsumer Confidence Report (pillar A)0.075 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
2,3,7,8-TCDDConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
2,4-DConsumer Confidence Report (pillar A)0.07 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
AlachlorConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
AntimonyConsumer Confidence Report (pillar A)6 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
ArsenicConsumer Confidence Report (pillar A)0 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
AsbestosConsumer Confidence Report (pillar A)7 MFL40 CFR 141.62(b); 40 CFR 141.51.
AtrazineConsumer Confidence Report (pillar A)3 ยตg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
BariumConsumer Confidence Report (pillar A)2 mg/L40 CFR 141.62(b); 40 CFR 141.51.
BenzeneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
Benzo(a)pyreneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
BerylliumConsumer Confidence Report (pillar A)4 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
Beta Particles and Photon EmittersConsumer Confidence Report (pillar A)0 mrem/year40 CFR 141.66(d); 40 CFR 141.55.
Bis(2-ethylhexyl) adipateConsumer Confidence Report (pillar A)0.4 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
Bis(2-ethylhexyl) phthalateConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
BromateConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.64(a); 40 CFR 141.53.
CadmiumConsumer Confidence Report (pillar A)5 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
CarbofuranConsumer Confidence Report (pillar A)0.04 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
Carbon TetrachlorideConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
Chlordane (mixture of isomers)Consumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
ChloriteConsumer Confidence Report (pillar A)0.8 mg/L40 CFR 141.64(a); 40 CFR 141.53.
ChlorobenzeneConsumer Confidence Report (pillar A)0.1 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
ChloroformConsumer Confidence Report (pillar A)0.07 mg/L40 CFR 141.53; 71 FR 388.
Chromium (Total)Consumer Confidence Report (pillar A)100 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
cis 1,2 DichloroethyleneConsumer Confidence Report (pillar A)0.07 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
CyanideConsumer Confidence Report (pillar A)200 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
DalaponConsumer Confidence Report (pillar A)0.2 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
DibromochloromethaneConsumer Confidence Report (pillar A)0.06 mg/L40 CFR 141.53; 63 FR 69390.
DibromochloropropaneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
DichloromethaneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
DinosebConsumer Confidence Report (pillar A)0.007 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
DiquatConsumer Confidence Report (pillar A)0.02 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
EndothallConsumer Confidence Report (pillar A)0.1 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
EndrinConsumer Confidence Report (pillar A)0.002 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
EthylbenzeneConsumer Confidence Report (pillar A)0.7 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
Ethylene dibromideConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
GlyphosateConsumer Confidence Report (pillar A)0.7 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
Gross Alpha (Excl. Radon and Uranium)Consumer Confidence Report (pillar A)0 pCi/L40 CFR 141.66(c); 40 CFR 141.55.
Total Haloacetic Acids (HAA5)Consumer Confidence Report (pillar A)None listed (see note above)40 CFR 141.64(b)(2).
HeptachlorConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
Heptachlor epoxideConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
HexachlorobenzeneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
HexachlorocyclopentadieneConsumer Confidence Report (pillar A)0.05 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
GenXUCMR 5 (pillar B)10 ng/L40 CFR 141.61(c)(2); 40 CFR 141.50(b); 89 FR 32532.
LeadLead 90th percentile (pillar C)0 ยตg/L40 CFR 141.80(a), (c); 40 CFR 141.51; 89 FR 86418.
LindaneConsumer Confidence Report (pillar A)0.0002 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
MercuryConsumer Confidence Report (pillar A)2 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
MethoxychlorConsumer Confidence Report (pillar A)0.04 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
Monochloroacetic AcidConsumer Confidence Report (pillar A)0.07 mg/L40 CFR 141.53; 71 FR 388.
Nitrate (as N)Consumer Confidence Report (pillar A)10 mg/L40 CFR 141.62(b); 40 CFR 141.51.
Nitrate (as NO3)Consumer Confidence Report (pillar A)44.26643820946669 mg/L40 CFR 141.62(b); 40 CFR 141.51.
Nitrite (as N)Consumer Confidence Report (pillar A)1 mg/L40 CFR 141.62(b); 40 CFR 141.51.
Nitrite and NitrateConsumer Confidence Report (pillar A)10 mg/L40 CFR 141.62(b); 40 CFR 141.51.
OxamylConsumer Confidence Report (pillar A)0.2 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
PentachlorophenolConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
PFAS mixture Hazard IndexUCMR 5 (pillar B)1 unitless40 CFR 141.61(c)(2); 40 CFR 141.50(b); 89 FR 32532.
Perfluorohexanesulfonic acidUCMR 5 (pillar B)10 ng/L40 CFR 141.61(c)(2); 40 CFR 141.50(b); 89 FR 32532.
Perfluorononanoic acidUCMR 5 (pillar B)10 ng/L40 CFR 141.61(c)(2); 40 CFR 141.50(b); 89 FR 32532.
Perfluorooctanoic acidUCMR 5 (pillar B)0 ng/L40 CFR 141.61(c)(2); 40 CFR 141.50(a); 89 FR 32532.
Perfluorooctanesulfonic acidUCMR 5 (pillar B)0 ng/L40 CFR 141.61(c)(2); 40 CFR 141.50(a); 89 FR 32532.
PicloramConsumer Confidence Report (pillar A)0.5 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
Polychlorinated BiphenylsConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
Radium, combined (-226 & -228)Consumer Confidence Report (pillar A)0 pCi/L40 CFR 141.66(b); 40 CFR 141.55.
SeleniumConsumer Confidence Report (pillar A)50 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
SilvexConsumer Confidence Report (pillar A)0.05 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
SimazineConsumer Confidence Report (pillar A)0.004 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(b).
StyreneConsumer Confidence Report (pillar A)0.1 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
TetrachloroethyleneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
ThalliumConsumer Confidence Report (pillar A)0.5 ยตg/L40 CFR 141.62(b); 40 CFR 141.51.
TolueneConsumer Confidence Report (pillar A)1 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
ToxapheneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(c)(1); 40 CFR 141.50(a).
trans 1,2 DichloroethyleneConsumer Confidence Report (pillar A)0.1 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).
Trichloroacetic Acid (TCA)Consumer Confidence Report (pillar A)0.02 mg/L40 CFR 141.53; 71 FR 388.
TrichloroethyleneConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
Total THMsConsumer Confidence Report (pillar A)None listed (see note above)40 CFR 141.64(b)(2).
UraniumConsumer Confidence Report (pillar A)0 ยตg/L40 CFR 141.66(e); 40 CFR 141.55.
Vinyl ChlorideConsumer Confidence Report (pillar A)0 mg/L40 CFR 141.61(a); 40 CFR 141.50(a).
Xylenes (Total)Consumer Confidence Report (pillar A)10 mg/L40 CFR 141.61(a); 40 CFR 141.50(b).

Sensitivity analysis

Each pillar weight was drawn within ยฑ25 % of its value and renormalised, 10,000 times, with seed 20261022 (xoshiro128**/splitmix32). Each named scenario below changes one structure or data choice and re-ranks every city.

Named scenarios
ScenarioEffective weightsSpearman ฯCities moving more than 10 placesTier changes
S-equal25 / 25 / 25 / 250.995Buffalo, NY0 moved (0 toward Tier 1, 0 away)
S-lead4040 / 21.428571428571427 / 21.428571428571427 / 17.1428571428571420.977Washington, DC; Chicago, IL; Indianapolis, IN; Detroit, MI; Minneapolis, MN; St. Paul, MN; St. Louis, MO; Buffalo, NY; New York, NY; Memphis, TN; Milwaukee, WI0 moved (0 toward Tier 1, 0 away)
S-rescission30 / 25 / 25 / 200.996None0 moved (0 toward Tier 1, 0 away)
S-noDBP30 / 25 / 25 / 200.914Anchorage, AK; Huntsville, AL; Chandler, AZ; Mesa, AZ; Phoenix, AZ; Tucson, AZ; Bakersfield, CA; Fresno, CA; Irvine, CA; Oakland, CA; Riverside, CA; San Francisco, CA; Santa Ana, CA; Aurora, CO; Cape Coral, FL; Orlando, FL; Port St Lucie, FL; Atlanta, GA; Boise, ID; Lexington-Fayette, KY; Boston, MA; Baltimore, MD; Kansas City, MO; St. Louis, MO; Durham, NC; Winston-Salem, NC; New York, NY; Columbus, OH; Oklahoma City, OK; Portland, OR; Memphis, TN; Arlington, TX; Garland, TX; Laredo, TX; Lubbock, TX; Plano, TX0 moved (0 toward Tier 1, 0 away)
S-HBonly30 / 25 / 25 / 200.991Chandler, AZ; Denver, CO; Port St Lucie, FL; Pittsburgh, PA0 moved (0 toward Tier 1, 0 away)
S-noViol37.5 / 31.25 / 31.25 / 00.963Stockton, CA; Denver, CO; Cape Coral, FL; Port St Lucie, FL; New Orleans, LA; Baltimore, MD; St. Paul, MN; Toledo, OH; Austin, TX; Laredo, TX0 moved (0 toward Tier 1, 0 away)
S-cens030 / 25 / 25 / 200.986Fresno, CA; Santa Ana, CA; Tampa, FL; Durham, NC; Arlington, TX; Irving, TX0 moved (0 toward Tier 1, 0 away)
S-censMRL30 / 25 / 25 / 200.978Anchorage, AK; Fresno, CA; Santa Ana, CA; Miami, FL; Tampa, FL; Durham, NC; Greensboro, NC; Newark, NJ; Arlington, TX; Dallas, TX0 moved (0 toward Tier 1, 0 away)
S-lslNonlead30 / 25 / 25 / 200.950Washington, DC; Fort Wayne, IN; Indianapolis, IN; Wichita, KS; Minneapolis, MN; Lincoln, NE; Jersey City, NJ; Newark, NJ; Cincinnati, OH; Cleveland, OH; Toledo, OH; Pittsburgh, PA; Madison, WI; Milwaukee, WI0 moved (0 toward Tier 1, 0 away)
S-lslLead30 / 25 / 25 / 200.785Anchorage, AK; Huntsville, AL; Chandler, AZ; Glendale, AZ; Mesa, AZ; Phoenix, AZ; Scottsdale, AZ; Tucson, AZ; Anaheim, CA; Fresno, CA; Irvine, CA; Long Beach, CA; Los Angeles, CA; Oakland, CA; Sacramento, CA; San Diego, CA; San Francisco, CA; San Jose, CA; Santa Ana, CA; Stockton, CA; Aurora, CO; Colorado Springs, CO; Denver, CO; Washington, DC; Cape Coral, FL; Jacksonville, FL; Orlando, FL; Port St Lucie, FL; St. Petersburg, FL; Tampa, FL; Atlanta, GA; Urban Honolulu, HI; Boise, ID; Chicago, IL; Lexington-Fayette, KY; Boston, MA; Detroit, MI; St. Paul, MN; Kansas City, MO; St. Louis, MO; Charlotte, NC; Durham, NC; Greensboro, NC; Raleigh, NC; Winston-Salem, NC; Henderson, NV; Las Vegas, NV; North Las Vegas, NV; Reno, NV; Buffalo, NY; New York, NY; Columbus, OH; Oklahoma City, OK; Tulsa, OK; Portland, OR; Memphis, TN; Nashville, TN; Arlington, TX; Austin, TX; Corpus Christi, TX; Dallas, TX; El Paso, TX; Fort Worth, TX; Frisco, TX; Garland, TX; Houston, TX; Irving, TX; Lubbock, TX; McKinney, TX; Plano, TX; San Antonio, TX; Chesapeake, VA; Richmond, VA; Milwaukee, WI0 moved (0 toward Tier 1, 0 away)
S-viol3y30 / 25 / 25 / 200.983Stockton, CA; Denver, CO; Cape Coral, FL; St. Paul, MN; Newark, NJ; Austin, TX0 moved (0 toward Tier 1, 0 away)
S-dlr30 / 25 / 25 / 200.988Durham, NC; Oklahoma City, OK; Arlington, TX; Milwaukee, WI0 moved (0 toward Tier 1, 0 away)
S-stale30 / 25 / 25 / 201.000None0 moved (0 toward Tier 1, 0 away)
S-blend30 / 25 / 25 / 200.988Chula Vista, CA; Stockton, CA0 moved (0 toward Tier 1, 0 away)
S-geo30 / 25 / 25 / 200.932Chandler, AZ; Phoenix, AZ; Tucson, AZ; Fresno, CA; Irvine, CA; Sacramento, CA; Santa Ana, CA; Stockton, CA; Boise, ID; Chicago, IL; Fort Wayne, IN; New Orleans, LA; Baltimore, MD; St. Paul, MN; Greensboro, NC; Omaha, NE; Jersey City, NJ; Newark, NJ; Las Vegas, NV; North Las Vegas, NV; New York, NY; Cincinnati, OH; Columbus, OH; Philadelphia, PA; Fort Worth, TX; Frisco, TX; Garland, TX; Plano, TX; San Antonio, TX0 moved (0 toward Tier 1, 0 away)
S-noFlag30 / 25 / 25 / 201.000None0 moved (0 toward Tier 1, 0 away)
S-d2BeginQuarter30 / 25 / 25 / 200.997Denver, CO0 moved (0 toward Tier 1, 0 away)

Comparison with a rule changed after registration

Scenario S-d2BlankEndToWindow applies the rule as it stood before 2026-11-05. It is reported apart from the named scenarios above and is left out of their counts, the weight draws and the rank ranges. Spearman ฯ with the published ranking: 0.996. Cities moving more than 10 places: Santa Ana, CA. The per-city table below gives each city's rank under the earlier rule beside its baseline rank.

Realised importance is the correlation ratio (ฮทยฒ) of each pillar's score with the composite score, set beside its nominal weight.

Realised importance of each pillar
PillarNominal weightฮทยฒLinear Rยฒ
Lead300.1620.110
PFAS250.3020.282
Other regulated contaminants250.3840.374
EPA compliance history200.1520.146

Of the 11 cities in the baseline top 10 (ties included), 6 stayed in the top 10 in at least 90 % of weight draws; of the 10 cities in the baseline bottom 10, 7 stayed in the bottom 10 in at least 90 %. 42 cities have a 90 % rank range wider than 10 places.

Rank range and stability by city
CityBaseline rankRank under the earlier ruleMedian rank90 % rangeTop 10 shareBottom 10 shareTierStability
Urban Honolulu, HI1111 to 1100.0 %0.0 %1top 10 in 100 % of draws; 16 of 17 named scenarios
Albuquerque, NM2222 to 2100.0 %0.0 %1top 10 in 100 % of draws; 17 of 17 named scenarios
Virginia Beach, VA3333 to 4100.0 %0.0 %1top 10 in 100 % of draws; 16 of 17 named scenarios
Chesapeake, VA4443 to 4100.0 %0.0 %1top 10 in 100 % of draws; 16 of 17 named scenarios
Seattle, WA5555 to 6100.0 %0.0 %1top 10 in 100 % of draws; 17 of 17 named scenarios
Charlotte, NC6666 to 9100.0 %0.0 %1top 10 in 100 % of draws; 15 of 17 named scenarios
Memphis, TN7775 to 1775.9 %0.0 %1top 10 in 75.92 % of draws; 13 of 17 named scenarios
Boston, MA8897 to 1486.9 %0.0 %1top 10 in 86.88 % of draws; 14 of 17 named scenarios
Chula Vista, CA9997 to 1268.8 %0.0 %1top 10 in 68.82 % of draws; 9 of 17 named scenarios
Raleigh, NC1010107 to 1755.5 %0.0 %1top 10 in 55.48 % of draws; 7 of 17 named scenarios
Nashville, TN1010108 to 1265.5 %0.0 %1top 10 in 65.45 % of draws; 12 of 17 named scenarios
Kansas City, MO1212118 to 1642.8 %0.0 %1None
Riverside, CA13131410 to 167.9 %0.0 %1None
Tulsa, OK13131411 to 150.4 %0.0 %1None
Colorado Springs, CO15151412 to 180.0 %0.0 %1None
Long Beach, CA1616159 to 1711.0 %0.0 %1None
Winston-Salem, NC1717179 to 1910.4 %0.0 %1None
Irvine, CA18181815 to 260.0 %0.0 %1None
St. Louis, MO19222016 to 300.0 %0.0 %1None
Irving, TX20192119 to 270.0 %0.0 %2None
Louisville, KY20192118 to 280.0 %0.0 %2None
Richmond, VA20192119 to 260.0 %0.0 %2None
Oakland, CA23232319 to 300.0 %0.0 %2None
Arlington, TX23232420 to 310.0 %0.0 %2None
Minneapolis, MN25252518 to 330.0 %0.0 %2None
Aurora, CO25252521 to 280.0 %0.0 %2None
Atlanta, GA27362723 to 310.0 %0.0 %2None
Portland, OR28272825 to 310.0 %0.0 %2None
San Diego, CA29282920 to 350.0 %0.0 %2None
San Francisco, CA29283021 to 350.0 %0.0 %2None
Denver, CO29283021 to 340.0 %0.0 %2None
Oklahoma City, OK32313427 to 370.0 %0.0 %2None
Port St Lucie, FL32313329 to 350.0 %0.0 %2None
Dallas, TX34333325 to 370.0 %0.0 %2None
Anchorage, AK35373519 to 440.0 %0.0 %2None
Pittsburgh, PA36343529 to 370.0 %0.0 %2None
Cape Coral, FL37353632 to 390.0 %0.0 %2None
Cleveland, OH38383835 to 450.0 %0.0 %2None
Los Angeles, CA39393835 to 400.0 %0.0 %2None
McKinney, TX40404038 to 440.0 %0.0 %2None
St. Petersburg, FL41474240 to 460.0 %0.0 %3None
Lubbock, TX42444240 to 460.0 %0.0 %3None
Austin, TX42414339 to 490.0 %0.0 %3None
Corpus Christi, TX44424440 to 470.0 %0.0 %3None
Orlando, FL45434541 to 480.0 %0.0 %3None
Tampa, FL46444538 to 550.0 %0.0 %3None
Lexington-Fayette, KY47464743 to 500.0 %0.0 %3None
Toledo, OH48514840 to 580.0 %0.0 %3None
Durham, NC49594942 to 570.0 %0.0 %3None
Henderson, NV49484946 to 520.0 %0.0 %3None
Jacksonville, FL51555148 to 520.0 %0.0 %3None
Glendale, AZ52495248 to 550.0 %0.0 %3None
North Las Vegas, NV53505349 to 560.0 %0.0 %3None
Wichita, KS54515350 to 580.0 %0.0 %3None
Milwaukee, WI55535546 to 610.0 %0.0 %3None
Scottsdale, AZ56545552 to 570.0 %0.0 %3None
Frisco, TX57565753 to 600.0 %0.0 %3None
Plano, TX58575955 to 630.0 %0.0 %3None
Washington, DC58575854 to 640.0 %0.0 %3None
Garland, TX60625956 to 620.0 %0.0 %3None
San Jose, CA61606259 to 680.0 %0.0 %4None
Indianapolis, IN62616259 to 700.0 %0.0 %4None
Las Vegas, NV63636460 to 750.0 %0.0 %4None
Santa Ana, CA64786556 to 780.0 %0.0 %4None
Boise, ID65646661 to 760.0 %0.0 %4None
San Antonio, TX66656963 to 790.0 %0.0 %4None
Phoenix, AZ66656863 to 780.0 %0.0 %4None
Houston, TX68676964 to 740.0 %0.0 %4None
Tucson, AZ69686964 to 790.0 %0.0 %4None
Cincinnati, OH69686963 to 740.0 %0.0 %4None
Fresno, CA71707260 to 820.0 %0.0 %4None
El Paso, TX72717165 to 780.0 %0.0 %4None
Fort Wayne, IN73797166 to 770.0 %0.0 %4None
Buffalo, NY74737260 to 820.0 %0.0 %4None
Chandler, AZ75727568 to 830.0 %0.0 %4None
Greensboro, NC76767564 to 850.0 %0.0 %4None
Sacramento, CA77747866 to 870.0 %0.0 %4None
New York, NY77747767 to 840.0 %0.0 %4None
New Orleans, LA79777870 to 830.0 %0.0 %4None
Chicago, IL80868167 to 890.0 %3.0 %5None
Detroit, MI80808167 to 890.0 %2.8 %5None
Newark, NJ80808177 to 840.0 %0.0 %5None
Mesa, AZ83828274 to 870.0 %0.0 %5None
Lincoln, NE84838375 to 880.0 %0.0 %5None
Miami, FL85848475 to 900.0 %4.0 %5None
Huntsville, AL86858779 to 910.0 %13.8 %5None
St. Paul, MN87918879 to 950.0 %30.5 %5None
Columbus, OH88878884 to 910.0 %9.4 %5None
Jersey City, NJ89888884 to 930.0 %23.5 %5None
Bakersfield, CA90899082 to 940.0 %45.2 %5None
Omaha, NE91909085 to 940.0 %44.7 %5bottom 10 in 44.73 % of draws; 10 of 17 named scenarios
Baltimore, MD92969284 to 970.0 %64.7 %5bottom 10 in 64.73 % of draws; 10 of 17 named scenarios
Laredo, TX93929386 to 970.0 %75.6 %5bottom 10 in 75.65 % of draws; 12 of 17 named scenarios
Philadelphia, PA94929491 to 960.0 %97.6 %5bottom 10 in 97.59 % of draws; 15 of 17 named scenarios
Madison, WI95949491 to 990.0 %95.7 %5bottom 10 in 95.73 % of draws; 16 of 17 named scenarios
Gilbert, AZ96959691 to 970.0 %96.9 %5bottom 10 in 96.9 % of draws; 15 of 17 named scenarios
Fort Worth, TX97979793 to 990.0 %100.0 %5bottom 10 in 100 % of draws; 15 of 17 named scenarios
Anaheim, CA981009895 to 990.0 %99.8 %5bottom 10 in 99.79 % of draws; 15 of 17 named scenarios
Stockton, CA99999996 to 1000.0 %100.0 %5bottom 10 in 99.98 % of draws; 12 of 17 named scenarios
Reno, NV100989997 to 1000.0 %100.0 %5bottom 10 in 99.98 % of draws; 16 of 17 named scenarios

What the research says about these measures

Each statement below is quoted from our evidence register after a short topic label; the bracketed numbers link to its rows in the evidence table.

PFAS in large systems. EPA's UCMR 5 data summary reports that 15.5% of large public water systems (those serving more than 10,000 people) had at least one sampling-location average above the maximum contaminant level for an individual PFAS or the Hazard Index (662 of 4,277 systems).[1]

National counts. National counts use different windows and units: NRDC found health-based violations at 11.3 percent of systems serving fewer than 3,300 people and 11.7 percent of those serving more than 3,300 people between June 2016 and May 2019, and Allaire and colleagues found that 9% of the community water systems in their study sample violated health-based standards in 2015, affecting nearly 21 million people.[16][15]

Lead and children. In a pooled analysis of 1,333 children, Lanphear and colleagues found lead-related intellectual deficits at low blood lead levels and no evidence of a threshold, and EPA estimates that there are 4 million lead service lines across the country.[2][3]

Unknown service lines. EPA predicts that 1 million service lines reported as unknown are lead service lines, and surveys in Michigan, Illinois, Wisconsin and Indiana found that the materials of 16% of service lines, on average, were unknown and may be lead.[3][4]

What a lead result measures. A system's 90th-percentile lead result answers a compliance question, not an exposure question: Triantafyllidou and colleagues note that single-sample protocols are not meant to provide direct lead exposure information for individual households, and that water lead can vary between homes, within homes and at the same tap over time.[6]

Disinfection byproducts. Weisman and colleagues estimated that about 8,000 of the 79,000 annual US bladder cancer cases may be attributable to disinfection byproducts, with about 74% of those cases from surface-water systems serving more than 10,000 people, and a 2025 review graded the evidence that trihalomethanes increase bladder cancer risk as limited-suggestive, and found no clear association in the studies it rated at low risk of bias.[11][10]

A national cancer estimate. A 2019 analysis by Environmental Working Group staff, funded by the Park Foundation, estimated that the carcinogenic contaminants it analyzed in US community water systems may correspond to 105,887 lifetime cancer cases; it counted non-detects as zero, added contaminant risks together and took some cancer risk benchmarks from California's Office of Environmental Health Hazard Assessment.[12]

Uncertain ranks. Ranks are uncertain summaries: in a study of 52 UK IVF clinics, Marshall and colleagues found that ranks are extremely unreliable statistical summaries despite substantial differences between clinics, and Saisana and colleagues propose uncertainty and sensitivity analysis to assess the reliability of rankings built from composite indicators.[14][13]

Evidence

#CitationYearDesignnFunderGradeAccessWhat it foundHow we use it
[1]US EPA. The Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) Data Summary: July 2026. EPA 815-S-26-007 (final dataset).2026National monitoring census (all PWS >3,300 + representative sample <3,300)~10,130 PWS with full results; ~25,950 sampling locationsFederal agencystrong (as written: high)full text read
  • Systems with >=1 location average above a 2024 PFAS MCL: 15.5% of large (>10,000; 662/4,277), 8.3% medium, 7.1% small; weighted national 7.8%. Large PWS above MCL: PFOS 12.2%, PFOA 11.0%, PFHxS 0.9%, HI 1.1%, PFNA 0.1%, HFPO-DA 0.1%. 66% of locations with any PFAS >= MRL had multiple PFAS; max 13 co-occurring. MRL for PFOA/PFOS = 0.004 ug/L (= the MCL).
PFAS pillar input; the key prevalence figure for large systems; censoring rule.
[2]Lanphear BP, Hornung R, Khoury J, et al. Low-level environmental lead exposure and children's intellectual function: an international pooled analysis. Environ Health Perspect. 2005.2005Pooled analysis of 7 prospective cohorts1,333 childrenNIEHS (cohort funding); authors academicstrong (as written: high)full text read
  • 6.9 IQ points (95% CI 4.2-9.4) lower from 2.4 to 30 ug/dL; decrements 3.9 (2.4-5.3) for 2.4-10, 1.9 (1.2-2.6) for 10-20, 1.1 (0.7-1.5) for 20-30 ug/dL: the steepest slope is at the LOWEST levels. Children with max BLL <7.5 had significantly steeper slopes.
Lead severity; no threshold found / supralinear dose-response framing.
[3]US EPA. 2025 Update to the 7th Drinking Water Infrastructure Needs Survey and Assessment (fact sheet, Nov 2025).2025National inventory compilation (LCRR initial inventories)~48,000 CWSFederal agencystrong (as written: high)full text read
  • 4.0 million projected LSLs = ~3 million reported LSL/GRR + ~1 million 'unknown' lines predicted to be lead. Unknowns imputed per state as unknown x [(lead+GRR)/(lead+GRR+non-lead)]. Where a state reported nothing for a system, EPA assumed all non-lead. The formula is stated in the fact sheet text (source epa-dwinsa-2025-fact-sheet: 'EPA calculated a state-specific ratio of the number of lead and GRR service lines divided by the number of lead, GRR, and non-lead service lines'); the FY 2025 allotment memo (source epa-dwinsa-fy25-lslr-memo) describes the same approach and the 'approximately 4 million' estimate.
LSL sub-score design: impute unknowns the way EPA does; replaces the older 9.2 million estimate.
[4]Hensley K, Bosscher V, Triantafyllidou S, Lytle DA. Lead service line identification: a review of strategies and approaches. AWWA Water Sci. 2021.2021Review (EPA ORD)Surveys in MI, IL, WI, INEPAmoderate (as written: moderate)abstract read
  • On average 16% of service lines in those four states were of unknown material.
Unknowns are a material share; must not be scored as non-lead.
[5]Del Toral MA, Porter A, Schock MR. Detection and evaluation of elevated lead release from service lines: a field study. Environ Sci Technol. 2013.2013Field study, sequential sampling32 Chicago homes with LSLsEPA Region 5 / ORDmoderate (as written: moderate)abstract read
  • The LCR first-draw protocol 'systematically misses' high lead; maximum sequential-sample values were >4x Chicago's compliance results; highest lead linked to LSL disturbance.
90th-percentile limitation; disturbance caveat.
[6]Triantafyllidou S, Burkhardt J, Tully J, et al. Variability and sampling of lead in drinking water: assessing potential human exposure depends on the sampling protocol. Environ Int. 2021.2021Review (EPA ORD)Not recordedAuthors at EPA ORD; article reviewed in accordance with EPA policystrong (as written: high)full text read
  • Water lead varies between homes, within homes and at the same tap over time; compliance protocols answer a compliance question, not an exposure question; linking water lead to blood lead requires characterizing dataset suitability. Read in full (source triantafyllidou-2021-full-text, Europe PMC full-text XML; EPA-authored narrative review, no new data): water Pb 'can vary widely in space and in time (i.e., between homes, within homes and even at the same tap over time)'. Single-sample protocols 'are simple/practical to employ across many homes for system-wide compliance with a water Pb regulatory standard (Table 3), but they are not meant to provide direct water Pb exposure information for individual households'; the US 90th-percentile first-draw comparison uses a 15 ug/L action level '(which is not meant to be a health-based standard)' under the 1991 rule, then 'currently under revision'; first-draw gives a 'worst case' Pb concentration only 'for the segment of piping sampled' and a 1-L or 250-mL sample 'will not capture distal Pb plumbing sources, such as an LSL or Pb gooseneck'; random daytime sampling 'may therefore be suitable for assessment of average water Pb exposure system-wide but not in individual homes'. Table 3 assigns first-draw/90th-percentile sampling to regulatory compliance and random daytime/composite sampling to average exposure assessment.
Core citation for 'a 90th percentile is not your tap': compliance sampling is not designed to measure a household's exposure, and a home's water can be higher or lower than the system figure. EPA-authored; two co-authors are inventors on a patent filed by US EPA for a sampling device it discusses.
[7]Pieper KJ, Martin R, Tang M, et al. Evaluating water lead levels during the Flint water crisis. Environ Sci Technol. 2018.2018Citizen-science sampling, repeatedFlint homes (several rounds)Academic (Virginia Tech)moderate (as written: moderate)abstract read
  • Citizen 90th percentile 26.8 ug/L vs official claims of no problem; back-calculated LCR pool with 50% LSLs gives 31.7 ug/L; by summer 2017 citizen 90th (7.9) matched official results.
Site-selection bias in reported 90th percentiles.
[8]Trueman BF, Camara E, Gagnon GA. Evaluating the effects of full and partial lead service line replacement on lead levels in drinking water. Environ Sci Technol. 2016.2016Field profiles>100 homes (Halifax)NSERC (Canada)moderate (as written: moderate)abstract read
  • Full LSLR cut L3-L5 lead >50% within 3 days; partial LSLR more than doubled short-term premise lead and at 6 months 27% of first-draw >15 ug/L vs 13% before.
Replacement progress is not monotonic risk reduction; premise plumbing caveat.
[9]Gibson JM, Fisher M, Clonch A, MacDonald JM, Cook PJ. Children drinking private well water have higher blood lead than those with city water. Proc Natl Acad Sci USA. 2020.2020Cross-sectional linkage59,483 North Carolina childrenEPAmoderate (as written: moderate)abstract read
  • Private-well children had 25% higher odds (95% CI 6.2-48%) of elevated BLL; private wells serve ~13% of US (42.5 million).
Limitation: ranking covers public systems only.
[10]Helte E, Soderlund F, Save-Soderbergh M, Larsson SC, Akesson A. Exposure to drinking water trihalomethanes and risk of cancer: systematic review and dose-response meta-analysis. Environ Health Perspect. 2025.2025Pre-registered SR (PROSPERO) + dose-response meta-analysis, OHAT risk of bias29 publications; bladder 5,860 cases, CRC 9,262 casesFormas (Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning); Swedish Cancer Societystrong (as written: high)full text read
  • Read in full (source helte-2025-full-text, Europe PMC full-text XML; supplement not read): 29 publications on total THMs, including one (Doyle 1997) on chloroform alone. Bladder, highest vs lowest exposure category: 'RR= 1.33; 95% CI: 1.04, 1.72' (Results; the abstract gives 1.71), with 'substantial heterogeneity' (I2=67.6%); in low-risk-of-bias studies 'summary RR in low risk of bias=1.01 (95% CI: 0.74, 1.40)'; excluding the one mortality study, 'a summary RR of 1.21 (95% CI: 0.96, 1.54'. Dose-response (bladder only): 'The predicted RRs were statistically significant at THM concentrations of โ‰ฅ41ฮผg/L and higher' (44 without the mortality study); 'Lack of power may have affected the ability to detect significant associations at lower levels.' Colorectal: 'RR=1.15; 95% CI: 1.07, 1.24', stronger in men; the dose-response 'did not reach statistical significance at any THM concentration modeled'. Grades (WCRF): bladder and colorectal 'limited-suggestive'; other sites 'limited-no conclusion'. The authors note any THM association 'may in part be due to other coexisting by-product substances'.
THM evidence grade: limited-suggestive (WCRF) for bladder and colorectal cancer only, limited-no conclusion for other sites; the bladder result is not robust to study quality. Its grades are for THMs, so it cannot by itself place THMs below lead or arsenic.
[11]Weisman RJ, Heinrich A, Letkiewicz F, et al. Estimating national exposures and potential bladder cancer cases associated with chlorination DBPs in U.S. drinking water. Environ Health Perspect. 2022.2022Attributable-risk model (EPA authors)US PWS strataEPAmoderate (as written: moderate)abstract read
  • ~8,000 of 79,000 annual US bladder cancers potentially attributable to DBPs (~10%); ~74% of attributable cases from large surface-water systems (>10,000).
DBPs matter most in exactly the large surface-water systems this ranking covers.
[12]Evans S, Campbell C, Naidenko OV. Cumulative risk analysis of carcinogenic contaminants in United States drinking water. Heliyon. 2019.2019Cumulative risk assessment (additive)48,363 CWS, 2010-2017Park Foundation; all authors EWG staff; competing interests declared 'none'moderate (as written: moderate)full text read
  • >100,000 lifetime cancer cases; national attributable risk ~4x10^-4; most from arsenic, DBPs, radionuclides. Non-detects set to zero; risk-additivity; benchmarks partly Cal/OEHHA PHGs.
Precedent for a contaminant-level cumulative score; NOT an independent validation of EWG guidelines.
[13]Saisana M, Saltelli A, Tarantola S. Uncertainty and sensitivity analysis techniques as tools for the quality assessment of composite indicators. J R Stat Soc A. 2005.2005Methods paperUN Technology Achievement IndexEC JRCstrong (as written: high)abstract read
  • Propose uncertainty and sensitivity analysis when building composite indicators, including an assessment of the reliability of countries' rankings, applied to the UN Technology Achievement Index (abstract; the paper's methods were not read).
Sensitivity-analysis design.
[14]Marshall EC, Sanderson C, Spiegelhalter DJ, McKee M. Reliability of league tables of in vitro fertilisation clinics. BMJ. 1998.1998Retrospective analysis with rank CIs52 UK IVF clinicsAcademicstrong (as written: high)abstract read
  • Despite real differences between clinics, 'ranks are extremely unreliable statistical summaries'; only one clinic could confidently be placed in the bottom quarter.
Quote for why we publish tiers and rank ranges.
[15]Allaire M, Wu H, Lall U. National trends in drinking water quality violations. Proc Natl Acad Sci USA. 2018.2018Panel analysis (SDWIS) + probit17,900 CWS, 1982-2015NSF; Columbia Earth Institute; The Nature Conservancystrong (as written: high)full text read
  • Nearly 21 million people served by CWS with health-based violations in 2015; hot spots and rising trends in the Southwest; violation incidence substantially higher in rural areas; private ownership and purchased water associated with compliance. Read in full (source allaire-2018-full-text, Firecrawl parse of the PNAS PDF; SI and figure images not read): 'In 2015, 9% of CWSs in our study sample violated health-based water quality standards, affecting nearly 21 million people.' The sample is 17,900 CWSs that 'serve 87% of the population supplied by CWSs in the continental United States', each serving over 500 people; health-based violations only ('maximum contaminant levels (MCLs), maximum residual disinfectant levels, and treatment techniques'). 'At the national level, the linear time trend of violations is insignificant once we control for the year dummy variables'; 'Intense hot spots of SDWA violations are identified in Oklahoma and parts of Texas'; in the Southwest, after the Stage 1 DBP rule, 'DBPs account for the vast majority of violations'. Urbanization is a county-level index ('the combination of housing density, median household income, and percent nonwhite population'); 'Less urbanized areas are associated with greater likelihood of violation occurrence (Table S6)'. 'The probability of a total coliform violation for a privately owned utility is 0.5% lower than a government-owned utility' (1.0% for total violations); purchased water 0.9% lower than groundwater for total coliform. Data caveats: monitoring and reporting violations excluded because, the authors write, only a small portion of them reach the national SDWIS database; the authors also caution that some health-based violations are not reported or are reported inaccurately; 'Violation occurrence and reporting may differ across states due to differences in enforcement, financial resources, source water quality, and treatment costs'.
National violation prevalence and trends (health-based, systems over 500 people, 1982-2015) and rural/urban context at county level; its own caveats on under-reporting and state differences in reporting apply to any cross-place comparison. The 21 million figure covers the study sample, not all CWSs.
[16]Fedinick KP, Taylor S, Roberts M (NRDC, Coming Clean, EJHA). Watered Down Justice. NRDC; Sept 2019.2019NGO analysis of SDWISAll CWS, Jun 2016-May 2019NRDC (advocacy)moderate (as written: moderate)full text read
  • 170,959 violations in 24,133 CWS; systems with any violation served 39.5% of the US population. Systems <3,300 people: 85.2% of all violations and 80.1% of health-based violations, BUT the share of systems with an HB violation was similar: 11.3% (<3,300) vs 11.7% (>3,300). Race/ethnicity/language most strongly associated with slow enforcement.
Precedent; counts vs rates distinction; 'small systems dominate counts' must not be read as 'large systems are clean'.
[17]DiSalvo RW, Hill EL. Drinking water contaminant concentrations and birth outcomes. J Policy Anal Manage. 2024.2024Mother fixed-effects panel1,216,132 births to 820,173 mothers in 1,459 Pennsylvania CWSs, 2003โ€“2014 (analytic sample)NIH Office of the Director (DP5OD021338); University of Rochester EHSC, an NIH/NIEHS-funded program (P30 ES001247)strong (as written: high)full text read
  • Moving from the 10th to the 90th percentile of contamination among births NOT exposed to violations raised LBW by 12% and preterm birth by 17%. Read in full (source disalvo-hill-2024-full-text: the NIH author manuscript, 'Published in final edited form as' JPAM 43(2):368-399; Firecrawl parse of the PDF): 'Our most rigorous specification employs mother fixed effects and finds changing from the 10th to the 90th percentile of water contamination (among births not exposed to regulatory violations) increases low birth weight by 12% and preterm birth by 17%.' These are relative changes: 'a 10-to-90th percentile move leads to about a 0.8 percentage point increase in low birth weight (LBW). From the base LBW rate for non-plural births of 6.7% (Table 2), this is about a 12% increase.' Pennsylvania births 2003-2014; contamination is a composite index (each sample result relative to its MCL, averaged over the regulated contaminants sampled in gestation), and 'the step in this process that likely makes the strongest assumptions is weighting the contaminants available for each birth equally.' Without trimming the top 1% of the index, 'we would generally conclude that there is no significant effect of water contamination on birth outcomes'. The authors sketch grading systems by index quartile, A-D, with F for any violation.
Supports scoring levels, not only violations, with qualification: the causal estimate comes from changes within a system and within a mother over time in Pennsylvania, not from differences between places; it rests on an equal-weight index of many contaminants and on trimming the top 1%. Cite as a single-state quasi-experimental study.
[18]Young HA, Kolivras KN, Krometis LH, Marcillo CE, Gohlke JM. Examining the association between Safe Drinking Water Act violations and adverse birth outcomes in Virginia. Environ Res. 2023.2023Logistic regression, service-area exposure665,984 births (2007-2015)NIH, EPAmoderate (as written: moderate)abstract read
  • Nitrate-nitrite MONITORING violations associated with preterm birth OR 1.10 (1.02-1.18); authors: MR violations 'may be concealing health-based violations'.
Keep a small weight on monitoring/reporting violations.
[19]USGS. Domestic (Private) Supply Wells (web page, accessed 2026-10-11); DeSimone LA, et al. Quality of water from domestic wells in principal aquifers of the US, 1991-2004. USGS SIR 2008-5227; 2009.2009Federal survey~2,167 domestic wellsUSGSstrong (as written: high)abstract read (read: full-text (web page) + abstract)
  • >43 million people (~15% of US) rely on private wells, unregulated by SDWA; ~23% of wells had >=1 contaminant above an MCL or HBSL; no single contaminant >8%.
Limitation: rankings of public systems say nothing about well users.
[20]National Academies. Management of Legionella in Water Systems. Washington, DC: NAP; 2019.2019Consensus reportNot recordedNo funder recorded in our evidence registerstrong (as written: high)abstract read
  • Legionnaires' disease is the leading cause of reported waterborne outbreaks in the US; grows in building plumbing; incidence rose ~5-fold 2000-2017.
Limitation: premise-plumbing microbial risk is invisible to utility-level metrics.
[21]Cradock AL, Barrett JL, Poole MK, et al. Lead concentrations in US school drinking water: testing programs, prevalence, and policy opportunities, 2016-2018. Am J Public Health. 2022.2022Content + data analysis5,688 public schools in 7 statesNo funder recorded in our evidence registermoderate (as written: moderate)abstract read
  • Share of schools with any sample >5 ppb ranged 13%-81% across states.
Limitation: building taps (schools) differ from system metrics.

Grades use one scale for every study, strongest first: strong, moderate, limited, weak, ungraded. Each row also shows the grade as our research notes wrote it.

strong
(as written: high)
moderate
(as written: moderate)

Rows written by Environmental Working Group staff

These evidence rows were written or co-written by EWG staff; the quoted words are the row's own.

  • [12] Written by Environmental Working Group staff: "all authors EWG staff"

PFAS rules: where they stand

In April 2024 EPA set enforceable limits of 4.0 ng/L for PFOA and PFOS (health goal: zero) and limits for PFHxS, PFNA, HFPO-DA (GenX) and a mixture of PFAS, with compliance due in 2029. On 20 May 2026 EPA proposed two changes: letting systems request until 26 April 2031 to meet the PFOA and PFOS limits, which stay in place (91 FR 29425), and removing the limits for the other four (91 FR 29413), on procedural grounds rather than a new health finding. Comments closed on 20 July 2026. As of 2026-11-09, the Federal Register lists no final rule for either proposal, so the 2024 limits remain in the regulations. We show how the ranking changes without the four.

Limitations

Home plumbing. Water at your tap depends on your home's plumbing as well as on your utility: Triantafyllidou and colleagues note that water lead can vary between homes, within homes and at the same tap over time, and in a field study of Chicago homes with lead service lines, Del Toral and colleagues found that the first-draw compliance sampling protocol systematically missed high lead levels, with the highest lead linked to disturbance of the service line.[6][5]

Which homes are sampled. A reported 90th-percentile lead result depends on which homes are sampled and when: during the Flint water crisis, Pieper and colleagues found a citizen-sampled 90th percentile well above what official claims of no problem implied, and in Halifax, Trueman and colleagues found that partial lead service line replacement may more than double lead at the tap in the short term.[7][8]

Unreported service lines. Water systems compile their own service line inventories and submit the data to EPA, and where a state reported no inventory data for a water system, EPA assumed that all of that system's service connections were non-lead.[3]

Private wells. This ranking covers public water systems only: USGS reports that tens of millions of people in the US rely on private domestic wells, which the Safe Drinking Water Act does not regulate, and in North Carolina, Gibson and colleagues found that drinking private well water was associated with higher odds of elevated blood lead in children than drinking city water.[19][9]

Building and school taps. This ranking does not measure Legionella in building plumbing or lead at individual school taps: the National Academies report that Legionella grows in building plumbing and that Legionnaires' disease is the leading cause of reported waterborne disease outbreaks in the US, and Cradock and colleagues found that the share of schools with any drinking water sample above a low lead threshold varied widely across the seven states they studied.[20][21]

Periodic testing. Testing is periodic: EPA's UCMR 5 data summary describes a full set of results for a sampling location as two sample results for ground water sources or four for surface water sources, and in Virginia, Young and colleagues found that nitrate-nitrite monitoring violations were associated with preterm birth and wrote that monitoring and reporting violations may be concealing health-based violations.[1][18]

Below a limit. A result below a limit is not the same as zero risk: in Pennsylvania births not exposed to regulatory violations, DiSalvo and Hill found that higher drinking water contamination was associated with more low birth weight and preterm births, although the authors note that without trimming the highest values of their contamination index they would generally conclude there was no significant effect.[17]

The score compares water systems with each other. It is not a safety certificate for any of them.

The rules are changing: the PFAS section above sets out where they stand.

Not scored: taste, hardness, fluoride, bottled water and water bills.

Out of scope: SDWIS records under rules marked "Not Federally Regulated" (rule family 500, state-only requirements).

How this compares with other rankings

We name other work on US tap water here without linking to it.

U.S. News's Best States 2026 ranking measures drinking water quality as "the number of violation points accrued over five years by public water systems per 1,000 customers served," citing the Environmental Protection Agency (captured June 2026).

NRDC's 2003 report graded 19 cities separately on water quality and compliance, right-to-know reports and source-water protection.

Other work in this area includes NRDC's 2017 report and EWG's Tap Water Database. We do not describe their methods here.

Where each number comes from

This page renders edition 2026, dataset 2026.1, from the study's committed snapshot parts. The dataset is published as a CSV file:

Download the dataset (CSV)

Pre-registered parameters: inputs/score-params.json, sha256:ee0d537c67f2527bc9861b15cde72a80873b75f2c5926919173ace5c5c3cc2ce.

Sensitivity analysis: 10,000 draws, seed 20261022, xoshiro128**/splitmix32.

Changelog

The dataset's changelog as published with it, one entry per dataset version, newest first.

Dataset 2026.1 (edition 2026)

  • Data cutoff: 2026-10-20
  • Rows: 100; columns: 146
  • Method change on 2026-11-05: D2 now counts a violation with no printed end date, listed by EPA as resolved with a return-to-compliance date inside the study window, through that date's quarter. The earlier rule ran every such record to the end of the window, and the sensitivity analysis reports it as comparison S-d2BlankEndToWindow. Reason: EPA lists those records as resolved, so counting them to the end of the window overstated how long they lasted.
  • First dataset version: no earlier version to compare with.

Corrections

No corrections have been made to this edition.

Cite this study

This page

"How We Ranked Tap Water in the 100 Largest US Cities: Methodology (2026)". TapWaterData, last reviewed 2026-11-09. https://www.tapwaterdata.com/rankings/cities/methodology (2026 edition)

APA: TapWaterData. (2026, November 9). How We Ranked Tap Water in the 100 Largest US Cities: Methodology (2026) (2026 edition). https://www.tapwaterdata.com/rankings/cities/methodology

The dataset

"Tap Water in the 100 Largest US Cities, Ranked (2026)" dataset, version 2026.1. TapWaterData. https://doi.org/10.5281/zenodo.24074052

APA: TapWaterData. (2026, November 9). Tap Water in the 100 Largest US Cities, Ranked (2026) (Version 2026.1) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.24074052

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