Wisconsin Water Quality Reports

Comprehensive water quality data for 477 cities across Wisconsin. View EPA-verified contaminant levels and get filter recommendations.

477

Cities

2

Safe

337

Monitor

79

At Risk

6

Limited testing

53

No Test Data

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

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 418 cities serving 3,668,574 people across 69 counties.

Common Contaminants in Wisconsin

407 cities in Wisconsin have at least one contaminant above EPA health guidelines.

Radium, combined (-226 & -228)(322 cities)Bromodichloromethane(261 cities)Gross Alpha (Excl. Radon and Uranium)(244 cities)Arsenic(87 cities)Bromoform(62 cities)Perfluorooctanoic acid(13 cities)

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Cities in Wisconsin

Milwaukee

People Served591K

176 results on file

Above Guidelines3

View Report →

Madison

People Served272K

159 results on file

Above Guidelines3

View Report →

Racine

People Served105K

144 results on file

Above Guidelines1

View Report →

Green Bay

People Served104K

148 results on file

Above Guidelines5

View Report →

Kenosha

People Served99K

143 results on file

Above Guidelines1

View Report →

Appleton

People Served72K

142 results on file

Above Guidelines1

View Report →

Waukesha

People Served71K

151 results on file

Above Guidelines3

View Report →

Eau Claire

People Served66K

142 results on file

Above Guidelines3

View Report →

Janesville

People Served64K

158 results on file

Above Guidelines2

View Report →

West Allis

People Served63K

52 results on file

Above Guidelines1

View Report →

Oshkosh

People Served63K

156 results on file

Above Guidelines1

View Report →

La Crosse

People Served53K

148 results on file

Above Guidelines5

View Report →

Lacrosse

People Served53K

148 results on file

Above Guidelines5

View Report →

Wauwatosa

People Served49K

40 results on file

Above Guidelines1

View Report →

Sheboygan

People Served48K

109 results on file

Above Guidelines1

View Report →

Fond Du Lac

People Served45K

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

Above Guidelines0

View Report →

Wausau

People Served39K

133 results on file

Above Guidelines3

View Report →

Beloit

People Served37K

150 results on file

Above Guidelines2

View Report →

Manitowoc

People Served35K

158 results on file

Above Guidelines3

View Report →

Sun Prairie

People Served34K

147 results on file

Above Guidelines1

View Report →

Oak Creek

People Served32K

130 results on file

Above Guidelines2

View Report →

West Bend

People Served32K

23 results on file

Above Guidelines1

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Brookfield

People Served29K

145 results on file

Above Guidelines4

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New Berlin

People Served28K

39 results on file

Above Guidelines1

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Stevens Point

People Served27K

144 results on file

Above Guidelines2

View Report →

Neenah

People Served26K

136 results on file

Above Guidelines1

View Report →

De Pere

People Served25K

130 results on file

Above Guidelines2

View Report →

Fitchburg

People Served25K

164 results on file

Above Guidelines2

View Report →

Watertown

People Served24K

142 results on file

Above Guidelines4

View Report →

Menomonee Falls

People Served24K

77 results on file

Above Guidelines1

View Report →

Franklin

People Served23K

96 results on file

Above Guidelines4

View Report →

Middleton

People Served22K

164 results on file

Above Guidelines2

View Report →

Caledonia

People Served22K

39 results on file

Above Guidelines2

View Report →

Grand Chute

People Served22K

38 results on file

Above Guidelines1

View Report →

South Milwaukee

People Served21K

131 results on file

Above Guidelines1

View Report →

Germantown

People Served20K

144 results on file

Above Guidelines2

View Report →

Wisconsin Rapids

People Served20K

103 results on file

Above Guidelines2

View Report →

Howard

People Served19K

96 results on file

Above Guidelines2

View Report →

Marshfield

People Served19K

145 results on file

Above Guidelines4

View Report →

Cudahy

People Served19K

146 results on file

Above Guidelines2

View Report →

Fox Crossing

People Served18K

131 results on file

Above Guidelines3

View Report →

Onalaska

People Served18K

147 results on file

Above Guidelines2

View Report →

Ashwaubenon

People Served18K

39 results on file

Above Guidelines2

View Report →

Hudson

People Served18K

146 results on file

Above Guidelines2

View Report →

Kaukauna

People Served17K

133 results on file

Above Guidelines3

View Report →

Beaver Dam

People Served16K

105 results on file

Above Guidelines2

View Report →

Hartford

People Served16K

145 results on file

Above Guidelines4

View Report →

Menomonie

People Served16K

143 results on file

Above Guidelines2

View Report →

Oconomowoc

People Served16K

145 results on file

Above Guidelines4

View Report →

Bellevue

People Served16K

39 results on file

Above Guidelines2

View Report →

River Falls

People Served15K

144 results on file

Above Guidelines2

View Report →

Weston

People Served15K

144 results on file

Above Guidelines4

View Report →

Menasha

People Served15K

143 results on file

Above Guidelines1

View Report →

Greendale

People Served14K

75 results on file

Above Guidelines1

View Report →

Whitefish Bay

People Served14K

37 results on file

Above Guidelines1

View Report →

Allouez

People Served14K

39 results on file

Above Guidelines1

View Report →

Whitewater

People Served14K

147 results on file

Above Guidelines3

View Report →

Waunakee

People Served14K

145 results on file

Above Guidelines1

View Report →

Plover

People Served13K

143 results on file

Above Guidelines1

View Report →

Chippewa Falls

People Served13K

135 results on file

Above Guidelines1

View Report →

Shorewood

People Served13K

38 results on file

Above Guidelines1

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Stoughton

People Served13K

145 results on file

Above Guidelines2

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Glendale

People Served13K

37 results on file

Above Guidelines1

View Report →

Brown Deer

People Served13K

38 results on file

Above Guidelines1

View Report →

Baraboo

People Served13K

164 results on file

Above Guidelines4

View Report →

Fort Atkinson

People Served12K

144 results on file

Above Guidelines2

View Report →

Platteville

People Served12K

145 results on file

Above Guidelines3

View Report →

Grafton

People Served12K

149 results on file

Above Guidelines1

View Report →

Port Washington

People Served12K

128 results on file

Above Guidelines1

View Report →

Cedarburg

People Served12K

147 results on file

Above Guidelines1

View Report →

Two Rivers

People Served11K

141 results on file

Above Guidelines1

View Report →

Mequon

People Served11K

58 results on file

Above Guidelines2

View Report →

Little Chute

People Served11K

145 results on file

Above Guidelines3

View Report →

Marinette

People Served11K

133 results on file

Above Guidelines1

View Report →

Monroe

People Served11K

145 results on file

Above Guidelines2

View Report →

Pleasant Prairie

People Served11K

39 results on file

Above Guidelines1

View Report →

Verona

People Served11K

179 results on file

Above Guidelines2

View Report →

Sussex

People Served11K

150 results on file

Above Guidelines2

View Report →

DeForest

People Served11K

159 results on file

Above Guidelines2

View Report →

Portage

People Served10K

148 results on file

Above Guidelines3

View Report →

Elkhorn

People Served10K

118 results on file

Above Guidelines4

View Report →

Holmen

People Served10K

147 results on file

Above Guidelines4

View Report →

Oregon

People Served10K

171 results on file

Above Guidelines2

View Report →

Sparta

People Served10K

148 results on file

Above Guidelines3

View Report →

Fort Mccoy

People Served10K

155 results on file

Above Guidelines2

View Report →

Reedsburg

People Served10K

121 results on file

Above Guidelines3

View Report →

Burlington

People Served10K

115 results on file

Above Guidelines3

View Report →

Merrill

People Served10K

146 results on file

Above Guidelines1

View Report →

Sturgeon Bay

People Served10K

122 results on file

Above Guidelines3

View Report →

McFarland

People Served9K

157 results on file

Above Guidelines2

View Report →

Waupun

People Served9K

136 results on file

Above Guidelines3

View Report →

New Richmond

People Served9K

119 results on file

Above Guidelines2

View Report →

Pewaukee

People Served9K

118 results on file

Above Guidelines7

View Report →

Greenville

People Served9K

117 results on file

Above Guidelines3

View Report →

Delavan

People Served8K

117 results on file

Above Guidelines1

View Report →

Rice Lake

People Served8K

107 results on file

Above Guidelines2

View Report →

Jackson

People Served8K

117 results on file

Above Guidelines3

View Report →

Sheboygan Falls

People Served8K

38 results on file

Above Guidelines1

View Report →

Muskego

People Served8K

160 results on file

Above Guidelines2

View Report →

Jefferson

People Served8K

152 results on file

Above Guidelines4

View Report →

Showing top 100 of 477 cities by population.

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

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