Illinois Water Quality Reports
Comprehensive water quality data for 753 cities across Illinois. View EPA-verified contaminant levels and get filter recommendations.
753
Cities
22
Safe
401
Monitor
330
At Risk
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 593 cities serving 16,511,836 people across 69 counties.
Common Contaminants in Illinois
731 cities in Illinois have at least one contaminant above EPA health guidelines.
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Upload my testCities in Illinois
Chicago
People Served2746K
Contaminants Tested73
Above Guidelines4
View Report โ
Elmwood Park
People Served2700K
Contaminants Tested20
Above Guidelines8
View Report โ
Evergreen Park
People Served2700K
Contaminants Tested20
Above Guidelines9
View Report โ
Oak Park
People Served2700K
Contaminants Tested20
Above Guidelines8
View Report โ
Riverdale
People Served2700K
Contaminants Tested20
Above Guidelines8
View Report โ
Summit
People Served2700K
Contaminants Tested20
Above Guidelines8
View Report โ
Cahokia Heights
People Served193K
Contaminants Tested310
Above Guidelines5
View Report โ
Belleville
People Served178K
Contaminants Tested258
Above Guidelines5
View Report โ
Swansea
People Served178K
Contaminants Tested258
Above Guidelines5
View Report โ
Fairview Heights
People Served178K
Contaminants Tested256
Above Guidelines5
View Report โ
Champaign
People Served155K
Contaminants Tested160
Above Guidelines4
View Report โ
Naperville
People Served155K
Contaminants Tested38
Above Guidelines2
View Report โ
Preston Heights
People Served151K
Contaminants Tested266
Above Guidelines3
View Report โ
Crystal Lawns
People Served150K
Contaminants Tested252
Above Guidelines4
View Report โ
Joliet
People Served149K
Contaminants Tested604
Above Guidelines3
View Report โ
Sunnyland
People Served149K
Contaminants Tested253
Above Guidelines3
View Report โ
Ridgewood
People Served149K
Contaminants Tested138
Above Guidelines3
View Report โ
Rockdale
People Served149K
Contaminants Tested138
Above Guidelines3
View Report โ
Shorewood
People Served149K
Contaminants Tested20
Above Guidelines6
View Report โ
Rockford
People Served147K
Contaminants Tested360
Above Guidelines2
View Report โ
Freeburg
People Served144K
Contaminants Tested170
Above Guidelines5
View Report โ
Smithton
People Served144K
Contaminants Tested163
Above Guidelines5
View Report โ
Urbana
People Served143K
Contaminants Tested257
Above Guidelines4
View Report โ
Savoy
People Served142K
Contaminants Tested122
Above Guidelines4
View Report โ
Brooklyn
People Served140K
Contaminants Tested128
Above Guidelines5
View Report โ
East St. Louis
People Served140K
Contaminants Tested128
Above Guidelines5
View Report โ
Fairmont City
People Served140K
Contaminants Tested128
Above Guidelines5
View Report โ
Shiloh
People Served140K
Contaminants Tested128
Above Guidelines5
View Report โ
Washington Park
People Served140K
Contaminants Tested128
Above Guidelines5
View Report โ
Peoria
People Served137K
Contaminants Tested254
Above Guidelines6
View Report โ
Kankakee
People Served123K
Contaminants Tested1155
Above Guidelines5
View Report โ
Bartonville
People Served121K
Contaminants Tested130
Above Guidelines6
View Report โ
Bellevue
People Served121K
Contaminants Tested130
Above Guidelines6
View Report โ
Lake Camelot
People Served121K
Contaminants Tested130
Above Guidelines6
View Report โ
Rome
People Served121K
Contaminants Tested130
Above Guidelines6
View Report โ
West Peoria
People Served121K
Contaminants Tested130
Above Guidelines6
View Report โ
Chatham
People Served117K
Contaminants Tested20
Above Guidelines4
View Report โ
Bartlett
People Served114K
Contaminants Tested20
Above Guidelines7
View Report โ
Elgin
People Served114K
Contaminants Tested125
Above Guidelines6
View Report โ
Bradley
People Served110K
Contaminants Tested176
Above Guidelines2
View Report โ
Bolingbrook
People Served103K
Contaminants Tested215
Above Guidelines3
View Report โ
Waukegan
People Served101K
Contaminants Tested168
Above Guidelines4
View Report โ
Cicero
People Served83K
Contaminants Tested38
Above Guidelines3
View Report โ
Bourbonnais
People Served80K
Contaminants Tested127
Above Guidelines2
View Report โ
Limestone
People Served80K
Contaminants Tested127
Above Guidelines2
View Report โ
Manteno
People Served80K
Contaminants Tested127
Above Guidelines2
View Report โ
Arlington Heights
People Served79K
Contaminants Tested38
Above Guidelines2
View Report โ
Romeoville
People Served76K
Contaminants Tested258
Above Guidelines5
View Report โ
Evanston
People Served76K
Contaminants Tested164
Above Guidelines5
View Report โ
Schaumburg
People Served75K
Contaminants Tested43
Above Guidelines2
View Report โ
Rosewood Heights
People Served71K
Contaminants Tested374
Above Guidelines6
View Report โ
Indian Creek
People Served66K
Contaminants Tested82
Above Guidelines3
View Report โ
Woodridge
People Served66K
Contaminants Tested335
Above Guidelines4
View Report โ
Orland Hills
People Served64K
Contaminants Tested75
Above Guidelines2
View Report โ
Skokie
People Served63K
Contaminants Tested38
Above Guidelines2
View Report โ
Elmhurst
People Served62K
Contaminants Tested75
Above Guidelines2
View Report โ
Des Plaines
People Served61K
Contaminants Tested38
Above Guidelines2
View Report โ
East Alton
People Served59K
Contaminants Tested295
Above Guidelines5
View Report โ
Orland Park
People Served59K
Contaminants Tested37
Above Guidelines2
View Report โ
Berwyn
People Served58K
Contaminants Tested38
Above Guidelines3
View Report โ
Forest Park
People Served58K
Contaminants Tested20
Above Guidelines5
View Report โ
Oak Lawn
People Served58K
Contaminants Tested55
Above Guidelines2
View Report โ
Tinley Park
People Served57K
Contaminants Tested37
Above Guidelines2
View Report โ
Downers Grove
People Served56K
Contaminants Tested79
Above Guidelines2
View Report โ
Normal
People Served54K
Contaminants Tested161
Above Guidelines3
View Report โ
Alton
People Served53K
Contaminants Tested170
Above Guidelines2
View Report โ
Wheaton
People Served53K
Contaminants Tested38
Above Guidelines2
View Report โ
Hoffman Estates
People Served52K
Contaminants Tested40
Above Guidelines2
View Report โ
Lombard
People Served49K
Contaminants Tested20
Above Guidelines4
View Report โ
Vernon Hills
People Served49K
Contaminants Tested209
Above Guidelines3
View Report โ
Buffalo Grove
People Served48K
Contaminants Tested162
Above Guidelines5
View Report โ
Mundelein
People Served48K
Contaminants Tested203
Above Guidelines4
View Report โ
Lemont
People Served47K
Contaminants Tested422
Above Guidelines4
View Report โ
O'Fallon
People Served47K
Contaminants Tested41
Above Guidelines2
View Report โ
Addison
People Served46K
Contaminants Tested20
Above Guidelines4
View Report โ
Godfrey
People Served46K
Contaminants Tested20
Above Guidelines6
View Report โ
Gurnee
People Served45K
Contaminants Tested85
Above Guidelines3
View Report โ
Moline
People Served45K
Contaminants Tested260
Above Guidelines3
View Report โ
Wheeling
People Served43K
Contaminants Tested162
Above Guidelines5
View Report โ
Glenview
People Served42K
Contaminants Tested42
Above Guidelines2
View Report โ
Millstadt
People Served42K
Contaminants Tested168
Above Guidelines2
View Report โ
Melrose Park
People Served42K
Contaminants Tested75
Above Guidelines2
View Report โ
Mount Prospect
People Served41K
Contaminants Tested38
Above Guidelines2
View Report โ
Streamwood
People Served40K
Contaminants Tested38
Above Guidelines2
View Report โ
North Chicago
People Served40K
Contaminants Tested250
Above Guidelines5
View Report โ
Bloomingdale
People Served39K
Contaminants Tested15
Above Guidelines4
View Report โ
Carol Stream
People Served39K
Contaminants Tested38
Above Guidelines2
View Report โ
Boulder Hill
People Served38K
Contaminants Tested120
Above Guidelines2
View Report โ
Oswego
People Served38K
Contaminants Tested120
Above Guidelines2
View Report โ
Danville
People Served38K
Contaminants Tested20
Above Guidelines4
View Report โ
Carpentersville
People Served38K
Contaminants Tested124
Above Guidelines5
View Report โ
Hanover Park
People Served38K
Contaminants Tested124
Above Guidelines5
View Report โ
Markham
People Served38K
Contaminants Tested76
Above Guidelines2
View Report โ
Calumet City
People Served37K
Contaminants Tested38
Above Guidelines2
View Report โ
Pekin
People Served37K
Contaminants Tested245
Above Guidelines5
View Report โ
Roscoe
People Served36K
Contaminants Tested244
Above Guidelines8
View Report โ
Machesney Park
People Served36K
Contaminants Tested124
Above Guidelines8
View Report โ
Darien
People Served36K
Contaminants Tested361
Above Guidelines2
View Report โ
Edwardsville
People Served35K
Contaminants Tested208
Above Guidelines5
View Report โ
Bellwood
People Served35K
Contaminants Tested75
Above Guidelines2
View Report โ
Showing top 100 of 753 cities by population.
Use the search box above to find any city in Illinois.
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