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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 2015 to September 2018 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, WI70,71898
Sussex Village Hall & Water UtilitySussex, WI10,57378
Pewaukee City Water and Sewer UtilityPewaukee, WI8,67149
Winneconne WaterworksWinneconne, WI2,37735
Deforest SouthMadison, WI2520
Evansville WaterworksEvansville, WI5,07016
Pine Grove VillaBancroft, WI7513
Ashland Water UtilityAshland, WI9,11512
Pearces Mobile Home EstatesMauston, WI3712
Dodge Sanitary District 1Dodge, WI26612
Lake Mills WaterworksLake Mills, WI5,30012
Oak Creek WaterworksOak Creek, WI32,10411
Brookfield Water UtilityBrookfield, WI29,07011
Harris VillaWestfield, WI2510
Sunshine Estates Mobile CtMosinee, WI14510
Arlington WaterworksArlington, WI82310
Shawano Co. UtilityShawano, WI1008
52nd Ave Water GroupKenosha, WI357
Montreal WaterworksMontreal, WI8877
Columbus Water & Light DepartmentColumbus, WI5,0367
Sherwood WaterworksSherwood, WI2,8796
Shady Oaks Mobile Home ParkMenomonie, WI406
Recreacres Mhc LlcStevens Point, WI3206
Green Acres Trailer CourtNew Lisbon, WI606
Cambridge Place Of DelafieldDelafield, WI506
Viola WaterworksViola, WI6676
Birchwood WaterworksBirchwood, WI4426
Stoddard WaterworksStoddard, WI7936
Deer Run Mobile Home CommunityMerrill, WI496
Cambria WaterworksCambria, WI7675

Large utilities that accumulated/accrued the most violation points as of October 2015 to September 2018 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, WI70,71898
Sussex Village Hall & Water UtilitySussex, WI10,57378
Brookfield Water UtilityBrookfield, WI29,07011
Oak Creek WaterworksOak Creek, WI32,10411
Village of Caledonia Water UtilityCaledonia, WI21,8193
Neenah WaterworksNeenah, WI25,8923
Fond Du Lac WaterworksFond Du Lac, WI42,0002
Franklin Water UtilityFranklin, WI22,5002
New Berlin Water UtilityNew Berlin, WI27,8992
Germantown Water UtilityGermantown, WI15,8642
Grafton WaterworksGrafton, WI11,4902
Madison Water UtilityMadison, WI235,0001
Cedarburg L & W CommissionCedarburg, WI11,9001
Brown Deer WaterworksBrown Deer, WI12,7411
Sheboygan Water UtilitiesSheboygan, WI48,7251
Menomonee Falls WW - Surface WaterMenomonee Falls, WI23,8671
Shorewood WaterworksShorewood, WI13,1891
La Crosse WaterworksLa Crosse, WI53,0001
Menasha Elec & Water UtilMenasha, WI14,7281
Oshkosh WaterworksOshkosh, WI63,0001
Bellevue WaterworksGreen Bay, WI14,8001
Racine WaterworksRacine, WI105,1001

Contaminants found in Wisconsin above health guidelines

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

Total trihalomethanes (TTHMs)
4333,783,7194353,785,528

Bromodichloromethane
4343,755,7944353,756,194

Radium, combined (-226 & -228)
9143,728,6189183,730,019

Dibromochloromethane
4063,540,4834073,541,826

Chloroform
3913,492,0744403,726,113

Nitrate
4822,787,9606393,409,418

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

Dichloroacetic acid
2272,672,6792543,084,375

Radium-228
5932,637,5635982,643,488

Radium-226
4712,501,2134772,503,490

Trichloroacetic acid
2171,827,1113183,293,621

Nitrate and nitrite
1481,434,7942001,533,794

Bromate
171,008,818171,008,818

Uranium
81854,5421791,250,402

Bromoform
130750,0562292,819,880

Arsenic
161565,268161565,268

Tetrachloroethylene (perchloroethylene)
31490,76631490,766

Radon
68408,57068408,570

Strontium
10212,6801092,988,907

Chlorate
8100,724812,296,938

Cadmium
1572,3312172,884

Trichloroethylene
769,25118408,145

Perfluorohexane sulfonate (PFHXS)
260,427260,427

Perfluorooctane sulfonate (PFOS)
153,000153,000

Perfluorooctanoic acid (PFOA)
131,500131,500

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

Vinyl chloride
214,851214,851

1,4-Dioxane
111,49015554,362

Thallium
75,861107,811

Manganese
23,99620344,075

Barium
32,8962551,831,759

Chloromethane
21,353133807,809

Di(2-ethylhexyl) phthalate
441391,121

Styrene
135234,177

1,2-Dichloroethane
1257237,860

Contaminants found in Wisconsin above legal limits

Contaminant# of UtilitiesPeople Served

Radium, combined (-226 & -228)
12151,016

Total trihalomethanes (TTHMs)
11,515

Arsenic
31,196

Nitrate
2235

Uranium
1150

Nitrate and nitrite
125