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EWG's Tap Water Database

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Wisconsin

  • 1,053 Utilities

  • Serving: 4,067,000

  • Data available: 2010-2015

  • Contaminants Found: 104

 

EWG's drinking water quality report for Wisconsin shows results of tests conducted by the water utilities in Wisconsin and provided to EWG by the Wisconsin Department of Natural Resources.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Wisconsin serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in Wisconsin

UtilityLocationPeople
Served
Allouez WaterworksGreen Bay, WI13,932
Appleton WaterworksMenasha, WI72,000
Ashwaubenon WaterworksGreen Bay, WI17,730
Baraboo WaterworksBaraboo, WI11,505
Beaver Dam Water UtilityBeaver Dam, WI16,200
Bellevue WaterworksGreen Bay, WI14,800
Brookfield Water UtilityBrookfield, WI29,070
Brown Deer WaterworksBrown Deer, WI12,741
Cedarburg L & W CommissionCedarburg, WI11,900
Chippewa Falls WaterworksChippewa Falls, WI13,375
City of BeloitBeloit, WI37,110
Cudahy WaterworksCudahy, WI18,659
Darboy Sanitary District 1Appleton, WI12,000
De Pere Water DepartmentDe Pere, WI23,920
Eau Claire WaterworksEau Claire, WI66,060
Fitchburg Utility District 1Fitchburg, WI15,000
Fond Du Lac WaterworksFond Du Lac, WI42,000
Fort Atkinson WaterworksFort Atkinson, WI12,125
Franklin Water UtilityFranklin, WI22,500
Germantown Water UtilityGermantown, WI15,864
Glendale WaterworksGlendale, WI12,883
Grafton WaterworksGrafton, WI11,490
Grand Chute Tn San District 1Grand Chute, WI21,583
Green Bay WaterworksGreen Bay, WI104,057
Greendale WaterworksGreendale, WI14,046
Hartford WaterworksHartford, WI14,320
Howard WaterworksGreen Bay, WI18,900
Hudson WaterworksHudson, WI16,416
Janesville Water UtilityJanesville, WI62,720
Kaukauna UtilitiesKaukauna, WI13,430
More

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Wisconsin

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Waukesha Water UtilityWaukesha, WI70,718145
Sussex Village Hall & Water UtilitySussex, WI10,57384
Tomah WaterworksTomah, WI9,19260
Pewaukee City Water and Sewer UtilityPewaukee, WI8,67156
Shady Oaks Mobile Home ParkMenomonie, WI4034
Deforest SouthMadison, WI2520
Lake Mills WaterworksLake Mills, WI5,30017
Marshview TerraceWaupun, WI4017
Pearces Mobile Home EstatesMauston, WI3712
Waterloo WaterworksWaterloo, WI3,31112
Winneconne WaterworksWinneconne, WI2,37712
Marshall WaterworksMarshall, WI3,67610
Harris VillaWestfield, WI2510
Sunshine Estates Mobile CtMosinee, WI14510
Evansville WaterworksEvansville, WI5,07010
Wrights Mobile Home ParkWhitewater, WI23010
2yk LlcAntigo, WI257
Colonial View AptsTwin Lakes, WI307
Hurley WaterworksHurley, WI1,5157
Williams Bay WaterworksWilliams Bay, WI2,6017
Genoa WaterworksGenoa, WI2646
Willow Run Rv Condominium ResortElkhorn, WI506
Cambridge Place Of DelafieldDelafield, WI506
Sherwood WaterworksSherwood, WI2,8796
Weyerhaeuser WaterworksWeyerhauser, WI3136
Country Estates Sanitary District Town Of Lyons 1Burlington, WI5006
Kiel WaterworksKiel, WI3,6306
Green Acres Trailer CourtNew Lisbon, WI606
Glen Flora WaterworksGlen Flora, WI936
Holland Tn Sanitary DistrictTown Of Holland, WI4956

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Wisconsin

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Waukesha Water UtilityWaukesha, WI70,718145
Sussex Village Hall & Water UtilitySussex, WI10,57384
New Berlin Water UtilityNew Berlin, WI27,8994
Fond Du Lac WaterworksFond Du Lac, WI42,0003
Brookfield Water UtilityBrookfield, WI29,0703
Neenah WaterworksNeenah, WI25,8923
Germantown Water UtilityGermantown, WI15,8642
Franklin Water UtilityFranklin, WI22,5002
Sheboygan Water UtilitiesSheboygan, WI48,7252
Green Bay WaterworksGreen Bay, WI104,0572
Menomonee Falls WW - Surface WaterMenomonee Falls, WI23,8672
Grafton WaterworksGrafton, WI11,4902
Village of Caledonia Water UtilityCaledonia, WI21,8192
Milwaukee WaterworksMilwaukee, WI647,2901
Racine WaterworksRacine, WI105,1001
Shorewood WaterworksShorewood, WI13,1891
Cedarburg L & W CommissionCedarburg, WI11,9001
Port Washington WaterworksPort Washington, WI11,4391
South Milwaukee WaterworksSouth Milwaukee, WI21,3401
Manitowoc WaterworksManitowoc, WI34,5001
Madison Water UtilityMadison, WI235,0001
Menasha Elec & Water UtilMenasha, WI14,7281
Two Rivers WaterworksTwo Rivers, WI12,6001
La Crosse WaterworksLa Crosse, WI53,0001

Contaminants found in Wisconsin above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
4043,752,5704203,777,987

Bromodichloromethane
3703,547,6314103,747,151

Chloroform
3052,927,2804053,711,920

Dibromochloromethane
2792,876,1913883,533,597

Chromium (hexavalent)
942,709,287992,793,125

Dichloroacetic acid
2172,666,4262443,078,122

Trichloroacetic acid
2081,822,2013062,641,349

Radium-228
721,341,067721,341,067

Radium-226
651,292,245651,292,245

Bromate
171,008,818171,008,818

Tritium
11870,79111870,791

Arsenic
31545,90531545,905

Tetrachloroethylene (perchloroethylene)
29490,63929490,639

Uranium
24284,137601,315,960

Strontium
11223,2531102,999,480

Nitrate
28158,1004563,320,922

Radon
36120,81736120,817

Chlorate
8100,724812,296,938

Cadmium
170,718170,718

Trichloroethylene
662,01018408,145

Perfluorohexane sulfonate (PFHXS)
260,427260,427

Perfluorooctane sulfonate (PFOS)
153,000153,000

Bromoform
850,4252242,818,550

Perfluorooctanoic acid (PFOA)
131,500131,500

1,2,3-Trichloropropane
123,867123,867

Nitrate and nitrite
521,225651,512,818

Vinyl chloride
214,851214,851

1,4-Dioxane
111,49015554,362

Manganese
23,9967100,150

Barium
12,766471,561,355

Thallium
12,11923,469

Chloromethane
21,35378536,255

Di(2-ethylhexyl) phthalate
11812492

Contaminants found in Wisconsin above legal limits

Contaminant# of UtilitiesPeople Served

Radium, combined (-226 & -228)
8173,066

Total trihalomethanes (TTHMs)
11,515

Arsenic
21,171