Connecticut Water Quality Reports
Comprehensive water quality data for 158 cities across Connecticut. View EPA-verified contaminant levels and get filter recommendations.
158
Cities
9
Safe
106
Monitor
43
At Risk
Water Quality by County
Explore aggregated water quality scores across Connecticut counties. Scores are calculated based on EPA data and weighted by population.
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Data from 14 cities serving 0 people across 0 counties.
Cities in Connecticut
Derby
People Served772K
Contaminants Tested302
Above Guidelines7
View Report β
Newington
People Served464K
Contaminants Tested290
Above Guidelines6
View Report β
Ansonia
People Served420K
Contaminants Tested167
Above Guidelines5
View Report β
Orange
People Served419K
Contaminants Tested271
Above Guidelines2
View Report β
Branford Center
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
Cheshire Village
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
East Haven
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
New Haven
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
North Haven
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
Northford
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
Quinnipiac University
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
West Haven
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
Woodmont
People Served419K
Contaminants Tested147
Above Guidelines2
View Report β
Wethersfield
People Served393K
Contaminants Tested282
Above Guidelines7
View Report β
East Hartford
People Served391K
Contaminants Tested272
Above Guidelines6
View Report β
Blue Hills
People Served391K
Contaminants Tested147
Above Guidelines4
View Report β
Glastonbury Center
People Served391K
Contaminants Tested147
Above Guidelines4
View Report β
Hartford
People Served391K
Contaminants Tested147
Above Guidelines4
View Report β
West Hartford
People Served391K
Contaminants Tested147
Above Guidelines4
View Report β
Long Hill
People Served382K
Contaminants Tested262
Above Guidelines3
View Report β
Shelton
People Served368K
Contaminants Tested1223
Above Guidelines25
View Report β
Newtown
People Served352K
Contaminants Tested270
Above Guidelines8
View Report β
Stamford
People Served352K
Contaminants Tested387
Above Guidelines6
View Report β
Tashua
People Served352K
Contaminants Tested258
Above Guidelines5
View Report β
Bridgeport
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Byram
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Coleytown
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Compo
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Cos Cob
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Daniels Farm
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Darien Downtown
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
East Village
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Fairfield University
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Georgetown
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Glenville
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Greens Farms
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Greenwich
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Indian Field
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Lordship
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Mill Plain
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Murray
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
New Canaan
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Noroton Heights
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Noroton
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Norwalk
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Old Greenwich
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Old Hill
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Oronoque
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Pemberwick
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Plattsville
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Poplar Plains
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Ridgefield
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Riverside
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Rock Ridge
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Route 7 Gateway
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Sacred Heart University
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Sandy Hook
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Saugatuck
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
South Wilton
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Southport
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Staples
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Stepney
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Stratford Downtown
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Tokeneke
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Trumbull Center
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
West Mountain
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Westport Village
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Wilton Center
People Served352K
Contaminants Tested135
Above Guidelines2
View Report β
Bristol
People Served149K
Contaminants Tested556
Above Guidelines9
View Report β
Waterbury
People Served140K
Contaminants Tested450
Above Guidelines14
View Report β
Oakville
People Served118K
Contaminants Tested181
Above Guidelines9
View Report β
Hazardville
People Served117K
Contaminants Tested316
Above Guidelines4
View Report β
Southwood Acres
People Served117K
Contaminants Tested316
Above Guidelines4
View Report β
New Britain
People Served99K
Contaminants Tested304
Above Guidelines6
View Report β
Broad Brook
People Served99K
Contaminants Tested420
Above Guidelines4
View Report β
Rockville
People Served99K
Contaminants Tested149
Above Guidelines2
View Report β
Sherwood Manor
People Served99K
Contaminants Tested149
Above Guidelines2
View Report β
Somers
People Served99K
Contaminants Tested149
Above Guidelines2
View Report β
Suffield Depot
People Served99K
Contaminants Tested149
Above Guidelines2
View Report β
Thompsonville
People Served99K
Contaminants Tested149
Above Guidelines2
View Report β
Windsor Locks
People Served99K
Contaminants Tested149
Above Guidelines2
View Report β
Kensington
People Served89K
Contaminants Tested311
Above Guidelines8
View Report β
Bethel
People Served72K
Contaminants Tested279
Above Guidelines5
View Report β
Danbury
People Served64K
Contaminants Tested777
Above Guidelines15
View Report β
Ridgebury
People Served62K
Contaminants Tested145
Above Guidelines2
View Report β
Meriden
People Served58K
Contaminants Tested138
Above Guidelines2
View Report β
Terryville
People Served58K
Contaminants Tested271
Above Guidelines5
View Report β
Clinton
People Served55K
Contaminants Tested1411
Above Guidelines46
View Report β
Manchester
People Served51K
Contaminants Tested140
Above Guidelines2
View Report β
Stonington
People Served46K
Contaminants Tested167
Above Guidelines8
View Report β
New London
People Served44K
Contaminants Tested138
Above Guidelines1
View Report β
Waterford
People Served44K
Contaminants Tested138
Above Guidelines1
View Report β
Middletown
People Served44K
Contaminants Tested417
Above Guidelines5
View Report β
Plantsville
People Served43K
Contaminants Tested142
Above Guidelines3
View Report β
Southington
People Served43K
Contaminants Tested142
Above Guidelines3
View Report β
Northwest Harwinton
People Served38K
Contaminants Tested147
Above Guidelines2
View Report β
Torrington
People Served38K
Contaminants Tested147
Above Guidelines2
View Report β
Mashantucket
People Served38K
Contaminants Tested0
Above Guidelines0
View Report β
Wallingford Center
People Served37K
Contaminants Tested133
Above Guidelines2
View Report β
Wallingford
People Served37K
Contaminants Tested133
Above Guidelines2
View Report β
Showing top 100 of 158 cities by population.
Use the search box above to find any city in Connecticut.
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