Illinois Water Quality Reports

Comprehensive water quality data for 753 cities across Illinois. View EPA-verified contaminant levels and get filter recommendations.

753

Cities

6

Safe

441

Monitor

124

At Risk

53

Limited testing

129

No Test Data

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Illinois water quality ranking EPA-certified testing labs Water utilities in Illinois

Water Quality by County

Explore aggregated water quality scores across Illinois counties. Scores are calculated based on EPA data and weighted by population.

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Data from 571 cities serving 9,052,771 people across 92 counties.

Common Contaminants in Illinois

557 cities in Illinois have at least one contaminant above EPA health guidelines.

Bromodichloromethane(466 cities)Dichloroacetic Acid (DCA)(448 cities)Radium, combined (-226 & -228)(159 cities)Bromoform(141 cities)Arsenic(119 cities)Gross Alpha Activity(109 cities)

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Cities in Illinois

Chicago

People Served2746K

55 results on file

Above Guidelines3

View Report →

Aurora

People Served183K

23 results on file

Above Guidelines1

View Report →

Naperville

People Served155K

36 results on file

Above Guidelines2

View Report →

Joliet

People Served149K

140 results on file

Above Guidelines2

View Report →

Rockford

People Served147K

126 results on file

Above Guidelines2

View Report →

Champaign

People Served142K

122 results on file

Above Guidelines4

View Report →

East St. Louis

People Served140K

126 results on file

Above Guidelines5

View Report →

Peoria

People Served121K

127 results on file

Above Guidelines5

View Report →

Springfield

People Served117K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Elgin

People Served114K

122 results on file

Above Guidelines6

View Report →

Waukegan

People Served87K

122 results on file

Above Guidelines3

View Report →

Cicero

People Served83K

36 results on file

Above Guidelines2

View Report →

Kankakee

People Served80K

125 results on file

Above Guidelines2

View Report →

Arlington Heights

People Served79K

36 results on file

Above Guidelines2

View Report →

Bloomington

People Served78K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Decatur

People Served76K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Evanston

People Served76K

125 results on file

Above Guidelines4

View Report →

Schaumburg

People Served75K

40 results on file

Above Guidelines2

View Report →

Bolingbrook

People Served74K

36 results on file

Above Guidelines2

View Report →

Palatine

People Served71K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Skokie

People Served63K

36 results on file

Above Guidelines2

View Report →

Des Plaines

People Served61K

36 results on file

Above Guidelines2

View Report →

Desplaines

People Served61K

36 results on file

Above Guidelines2

View Report →

Orland Park

People Served59K

35 results on file

Above Guidelines2

View Report →

Berwyn

People Served58K

36 results on file

Above Guidelines2

View Report →

Tinley Park

People Served57K

35 results on file

Above Guidelines2

View Report →

Oak Lawn

People Served55K

35 results on file

Above Guidelines2

View Report →

Wheaton

People Served53K

36 results on file

Above Guidelines2

View Report →

Hoffman Estates

People Served52K

36 results on file

Above Guidelines2

View Report →

Romeoville

People Served50K

123 results on file

Above Guidelines5

View Report →

Downers Grove

People Served49K

36 results on file

Above Guidelines2

View Report →

Lombard

People Served49K

39 results on file

Above Guidelines2

View Report →

O'Fallon

People Served47K

36 results on file

Above Guidelines2

View Report →

Addison

People Served46K

39 results on file

Above Guidelines2

View Report →

Elmhurst

People Served46K

36 results on file

Above Guidelines2

View Report →

Alton

People Served46K

121 results on file

Above Guidelines2

View Report →

Godfrey

People Served46K

20 contaminants listed, record not matched to an EPA water system

Above Guidelines0

View Report →

Normal

People Served46K

112 results on file

Above Guidelines3

View Report →

Moline

People Served45K

122 results on file

Above Guidelines2

View Report →

Buffalo Grove

People Served44K

36 results on file

Above Guidelines2

View Report →

Glenview

People Served42K

36 results on file

Above Guidelines2

View Report →

Mount Prospect

People Served41K

36 results on file

Above Guidelines2

View Report →

Crystal Lake

People Served41K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

DeKalb

People Served40K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Streamwood

People Served40K

36 results on file

Above Guidelines2

View Report →

Bloomingdale

People Served39K

31 results on file

Above Guidelines2

View Report →

Carol Stream

People Served39K

36 results on file

Above Guidelines2

View Report →

Wheeling

People Served39K

36 results on file

Above Guidelines2

View Report →

Oswego

People Served38K

123 results on file

Above Guidelines2

View Report →

Carpentersville

People Served38K

116 results on file

Above Guidelines4

View Report →

Hanover Park

People Served38K

120 results on file

Above Guidelines5

View Report →

Granite City

People Served38K

121 results on file

Above Guidelines2

View Report →

Calumet City

People Served37K

36 results on file

Above Guidelines2

View Report →

Machesney Park

People Served36K

124 results on file

Above Guidelines8

View Report →

Woodridge

People Served35K

36 results on file

Above Guidelines2

View Report →

Pekin

People Served35K

125 results on file

Above Guidelines3

View Report →

Elk Grove Village

People Served35K

36 results on file

Above Guidelines2

View Report →

Vernon Hills

People Served35K

36 results on file

Above Guidelines3

View Report →

Northbrook

People Served34K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Glendale Heights

People Served34K

36 results on file

Above Guidelines2

View Report →

St. Charles

People Served33K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Galesburg

People Served32K

23 results on file

Above Guidelines2

View Report →

Mundelein

People Served32K

36 results on file

Above Guidelines3

View Report →

Gurnee

People Served31K

36 results on file

Above Guidelines3

View Report →

Chicago Heights

People Served30K

35 results on file

Above Guidelines2

View Report →

Algonquin

People Served30K

126 results on file

Above Guidelines4

View Report →

Collinsville

People Served30K

23 results on file

Above Guidelines3

View Report →

Lake in the Hills

People Served29K

135 results on file

Above Guidelines4

View Report →

Round Lake Beach

People Served29K

36 results on file

Above Guidelines3

View Report →

Glen Ellyn

People Served28K

36 results on file

Above Guidelines2

View Report →

New Lenox

People Served28K

36 results on file

Above Guidelines2

View Report →

Wilmette

People Served28K

122 results on file

Above Guidelines3

View Report →

West Chicago

People Served27K

109 results on file

Above Guidelines3

View Report →

Huntley

People Served27K

126 results on file

Above Guidelines3

View Report →

Edwardsville

People Served27K

113 results on file

Above Guidelines3

View Report →

Midlothian

People Served27K

31 results on file

Above Guidelines2

View Report →

Carbondale

People Served26K

123 results on file

Above Guidelines2

View Report →

Batavia

People Served26K

60 results on file

Above Guidelines5

View Report →

Woodstock

People Served26K

41 results on file

Above Guidelines3

View Report →

Maywood

People Served26K

32 results on file

Above Guidelines2

View Report →

Melrose Park

People Served26K

36 results on file

Above Guidelines2

View Report →

Belvidere

People Served25K

126 results on file

Above Guidelines4

View Report →

Harvey

People Served25K

36 results on file

Above Guidelines2

View Report →

Hazel Crest

People Served25K

32 results on file

Above Guidelines2

View Report →

Westmont

People Served25K

36 results on file

Above Guidelines2

View Report →

Zion

People Served24K

30 results on file

Above Guidelines2

View Report →

Rolling Meadows

People Served24K

38 results on file

Above Guidelines2

View Report →

Frankfort

People Served24K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Freeport

People Served24K

23 results on file

Above Guidelines1

View Report →

Loves Park

People Served24K

124 results on file

Above Guidelines4

View Report →

Morton Grove

People Served24K

35 results on file

Above Guidelines3

View Report →

Blue Island

People Served23K

36 results on file

Above Guidelines2

View Report →

East Peoria

People Served23K

126 results on file

Above Guidelines6

View Report →

Lockport

People Served23K

23 results on file

Above Guidelines1

View Report →

Plano

People Served23K

40 results on file

Above Guidelines5

View Report →

Yorkville

People Served23K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Lisle

People Served23K

36 results on file

Above Guidelines2

View Report →

Roselle

People Served23K

35 results on file

Above Guidelines2

View Report →

South Elgin

People Served23K

126 results on file

Above Guidelines6

View Report →

South Holland

People Served23K

45 results on file

Above Guidelines2

View Report →

Showing top 100 of 753 cities by population.

Use the search box above to find any city in Illinois.

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