Wisconsin Water Quality Reports
Comprehensive water quality data for 477 cities across Wisconsin. View EPA-verified contaminant levels and get filter recommendations.
477
Cities
20
Safe
254
Monitor
203
At Risk
Water Quality by County
Explore aggregated water quality scores across Wisconsin counties. Scores are calculated based on EPA data and weighted by population.
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Data from 408 cities serving 7,369,691 people across 61 counties.
Common Contaminants in Wisconsin
457 cities in Wisconsin have at least one contaminant above EPA health guidelines.
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Upload my testCities in Wisconsin
Wauwatosa
People Served640K
Contaminants Tested220
Above Guidelines4
View Report โ
Milwaukee
People Served626K
Contaminants Tested545
Above Guidelines4
View Report โ
Greenfield
People Served591K
Contaminants Tested174
Above Guidelines4
View Report โ
St. Francis
People Served591K
Contaminants Tested174
Above Guidelines4
View Report โ
West Milwaukee
People Served591K
Contaminants Tested174
Above Guidelines4
View Report โ
Madison
People Served277K
Contaminants Tested1028
Above Guidelines4
View Report โ
Appleton
People Served117K
Contaminants Tested606
Above Guidelines4
View Report โ
Pleasant Prairie
People Served110K
Contaminants Tested192
Above Guidelines1
View Report โ
Sturtevant
People Served105K
Contaminants Tested263
Above Guidelines3
View Report โ
Racine
People Served105K
Contaminants Tested261
Above Guidelines1
View Report โ
Elmwood Park
People Served105K
Contaminants Tested148
Above Guidelines1
View Report โ
Mount Pleasant
People Served105K
Contaminants Tested148
Above Guidelines1
View Report โ
North Bay
People Served105K
Contaminants Tested148
Above Guidelines1
View Report โ
Green Bay
People Served104K
Contaminants Tested293
Above Guidelines6
View Report โ
Kenosha
People Served99K
Contaminants Tested239
Above Guidelines1
View Report โ
Altoona
People Served74K
Contaminants Tested280
Above Guidelines3
View Report โ
Waukesha
People Served72K
Contaminants Tested429
Above Guidelines4
View Report โ
Freedom
People Served72K
Contaminants Tested20
Above Guidelines3
View Report โ
Seymour
People Served70K
Contaminants Tested274
Above Guidelines3
View Report โ
Oshkosh
People Served67K
Contaminants Tested323
Above Guidelines3
View Report โ
Eau Claire
People Served66K
Contaminants Tested402
Above Guidelines3
View Report โ
Janesville
People Served64K
Contaminants Tested159
Above Guidelines3
View Report โ
West Allis
People Served63K
Contaminants Tested55
Above Guidelines1
View Report โ
Butler
People Served55K
Contaminants Tested287
Above Guidelines5
View Report โ
La Crosse
People Served54K
Contaminants Tested572
Above Guidelines5
View Report โ
French Island
People Served53K
Contaminants Tested156
Above Guidelines5
View Report โ
Sheboygan
People Served53K
Contaminants Tested268
Above Guidelines4
View Report โ
Whitefish Bay
People Served50K
Contaminants Tested186
Above Guidelines1
View Report โ
Menasha
People Served49K
Contaminants Tested511
Above Guidelines4
View Report โ
Shorewood
People Served49K
Contaminants Tested186
Above Guidelines1
View Report โ
Glendale
People Served48K
Contaminants Tested183
Above Guidelines1
View Report โ
River Hills
People Served48K
Contaminants Tested183
Above Guidelines1
View Report โ
Fox Crossing
People Served44K
Contaminants Tested450
Above Guidelines4
View Report โ
Fox Point
People Served42K
Contaminants Tested183
Above Guidelines1
View Report โ
Greenville
People Served41K
Contaminants Tested396
Above Guidelines4
View Report โ
Wausau
People Served39K
Contaminants Tested420
Above Guidelines3
View Report โ
Beloit
People Served37K
Contaminants Tested165
Above Guidelines2
View Report โ
De Pere
People Served36K
Contaminants Tested219
Above Guidelines2
View Report โ
Brookfield
People Served36K
Contaminants Tested365
Above Guidelines5
View Report โ
Oregon
People Served35K
Contaminants Tested344
Above Guidelines3
View Report โ
Manitowoc
People Served35K
Contaminants Tested170
Above Guidelines3
View Report โ
Sun Prairie
People Served34K
Contaminants Tested281
Above Guidelines1
View Report โ
Oak Creek
People Served32K
Contaminants Tested514
Above Guidelines2
View Report โ
Allouez
People Served30K
Contaminants Tested85
Above Guidelines2
View Report โ
Kaukauna
People Served30K
Contaminants Tested395
Above Guidelines5
View Report โ
New Berlin
People Served28K
Contaminants Tested84
Above Guidelines1
View Report โ
Stevens Point
People Served27K
Contaminants Tested647
Above Guidelines3
View Report โ
Park Ridge
People Served27K
Contaminants Tested142
Above Guidelines2
View Report โ
Menomonee Falls
People Served26K
Contaminants Tested300
Above Guidelines2
View Report โ
Neenah
People Served26K
Contaminants Tested142
Above Guidelines1
View Report โ
Fitchburg
People Served26K
Contaminants Tested542
Above Guidelines4
View Report โ
Watertown
People Served24K
Contaminants Tested348
Above Guidelines5
View Report โ
Pewaukee
People Served24K
Contaminants Tested589
Above Guidelines8
View Report โ
Hales Corners
People Served23K
Contaminants Tested328
Above Guidelines5
View Report โ
Little Chute
People Served23K
Contaminants Tested296
Above Guidelines4
View Report โ
Franklin
People Served23K
Contaminants Tested288
Above Guidelines5
View Report โ
Combined Locks
People Served22K
Contaminants Tested298
Above Guidelines4
View Report โ
Middleton
People Served22K
Contaminants Tested165
Above Guidelines3
View Report โ
Caledonia
People Served22K
Contaminants Tested41
Above Guidelines2
View Report โ
Grand Chute
People Served22K
Contaminants Tested42
Above Guidelines1
View Report โ
South Milwaukee
People Served21K
Contaminants Tested140
Above Guidelines1
View Report โ
Wisconsin Rapids
People Served20K
Contaminants Tested283
Above Guidelines2
View Report โ
Germantown
People Served20K
Contaminants Tested149
Above Guidelines3
View Report โ
Sussex
People Served19K
Contaminants Tested365
Above Guidelines8
View Report โ
Lisbon
People Served19K
Contaminants Tested281
Above Guidelines8
View Report โ
Howard
People Served19K
Contaminants Tested150
Above Guidelines2
View Report โ
Marshfield
People Served19K
Contaminants Tested284
Above Guidelines3
View Report โ
Cudahy
People Served19K
Contaminants Tested148
Above Guidelines2
View Report โ
Kimberly
People Served18K
Contaminants Tested269
Above Guidelines4
View Report โ
Onalaska
People Served18K
Contaminants Tested154
Above Guidelines2
View Report โ
Ashwaubenon
People Served18K
Contaminants Tested77
Above Guidelines2
View Report โ
Hudson
People Served18K
Contaminants Tested150
Above Guidelines3
View Report โ
Harrison
People Served18K
Contaminants Tested208
Above Guidelines4
View Report โ
Oconomowoc
People Served17K
Contaminants Tested331
Above Guidelines4
View Report โ
Beaver Dam
People Served16K
Contaminants Tested289
Above Guidelines3
View Report โ
Menomonie
People Served16K
Contaminants Tested369
Above Guidelines3
View Report โ
Hartford
People Served16K
Contaminants Tested141
Above Guidelines2
View Report โ
Bellevue
People Served16K
Contaminants Tested42
Above Guidelines2
View Report โ
River Falls
People Served15K
Contaminants Tested235
Above Guidelines4
View Report โ
Whiting
People Served15K
Contaminants Tested274
Above Guidelines4
View Report โ
Weston
People Served15K
Contaminants Tested147
Above Guidelines2
View Report โ
Waunakee
People Served15K
Contaminants Tested495
Above Guidelines3
View Report โ
Mequon
People Served14K
Contaminants Tested942
Above Guidelines3
View Report โ
Greendale
People Served14K
Contaminants Tested77
Above Guidelines1
View Report โ
Whitewater
People Served14K
Contaminants Tested347
Above Guidelines4
View Report โ
West Baraboo
People Served14K
Contaminants Tested296
Above Guidelines5
View Report โ
Chippewa Falls
People Served14K
Contaminants Tested499
Above Guidelines1
View Report โ
Plover
People Served14K
Contaminants Tested276
Above Guidelines1
View Report โ
Stoughton
People Served14K
Contaminants Tested273
Above Guidelines3
View Report โ
Baraboo
People Served13K
Contaminants Tested366
Above Guidelines5
View Report โ
Brown Deer
People Served13K
Contaminants Tested33
Above Guidelines1
View Report โ
Fort Atkinson
People Served12K
Contaminants Tested280
Above Guidelines3
View Report โ
Platteville
People Served12K
Contaminants Tested146
Above Guidelines4
View Report โ
Grafton
People Served12K
Contaminants Tested254
Above Guidelines2
View Report โ
Port Washington
People Served12K
Contaminants Tested123
Above Guidelines1
View Report โ
Cedarburg
People Served12K
Contaminants Tested143
Above Guidelines1
View Report โ
Two Rivers
People Served11K
Contaminants Tested270
Above Guidelines1
View Report โ
Portage
People Served11K
Contaminants Tested279
Above Guidelines4
View Report โ
Monroe
People Served11K
Contaminants Tested403
Above Guidelines3
View Report โ
Marinette
People Served11K
Contaminants Tested136
Above Guidelines1
View Report โ
Showing top 100 of 477 cities by population.
Use the search box above to find any city in Wisconsin.
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