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EWG's Tap Water Database — 2019 UPDATE

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Wisconsin

  • 1,047 Utilities

  • Serving: 4,054,000

  • Data available: 2012-2017

  • Contaminants Found: 109

 

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, WI12,048
Beaver Dam Water UtilityBeaver Dam, WI16,200
Bellevue WaterworksGreen Bay, WI15,365
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, WI20,027
Glendale WaterworksGlendale, WI12,883
Grafton WaterworksGrafton, WI11,745
Grand Chute Tn San District 1Grand Chute, WI21,583
Green Bay WaterworksGreen Bay, WI104,057
Greendale WaterworksGreendale, WI14,046
Hartford WaterworksHartford, WI15,384
Howard WaterworksGreen Bay, WI18,900
Hudson WaterworksHudson, WI17,100
Janesville Water UtilityJanesville, WI62,720
Kaukauna UtilitiesKaukauna, WI13,430
More

Utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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, WI70,718116
Sussex Village Hall & Water UtilitySussex, WI10,57393
Tomah WaterworksTomah, WI9,19280
Lake Mills WaterworksLake Mills, WI5,78040
Mauston Green AcresElk Mound, WI6039
Genoa City WaterworksGenoa City, WI2,76633
Shady Oaks Mobile Home ParkMenomonie, WI4032
Dodge Sanitary District 1Dodge, WI26630
Birchwood WaterworksBirchwood, WI44229
Medford Mobile Home Park LlcMarshfield, WI4828
Marshview TerraceWaupun, WI4025
Sheldon Water UtilitySheldon, WI26525
Arlington WaterworksArlington, WI82324
Deforest SouthMadison, WI2521
Cornell WaterworksCornell, WI1,39021
Prairie Du Sac WaterworksPrairie Du Sac, WI4,00620
Harris VillaWestfield, WI2520
Marshall WaterworksMarshall, WI3,86218
Lakeview Specialty HospitalWaterford, WI38417
337-9 Holy Hill Apartments LlcMundelien, WI3017
New Auburn WaterworksNew Auburn, WI54917
Carlton Heights Mobile Home Park Ct 2Sturgeon Bay, WI6015
Montreal WaterworksMontreal, WI88715
St Croix ImprovementsPrescott, WI17515
Pence WaterworksPence, WI19115
Abbotsford WaterworksAbbotsford, WI1,95614
Shady Nook Mobile Home Park 2Kansasville, WI5014
Glen Flora WaterworksGlen Flora, WI9314
Lake Geneva Utility CommissionLake Geneva, WI7,10713
Mequon Colony EstatesMequon, WI7512

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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, WI70,718116
Sussex Village Hall & Water UtilitySussex, WI10,57393
Stevens Point WaterworksStevens Point, WI24,55112
Superior Water Light & Power CompanySuperior, WI29,5716
Germantown Water UtilityGermantown, WI20,0275
Plover WaterworksPlover, WI12,4205
New Berlin Water UtilityNew Berlin, WI27,8994
Village of Caledonia Water UtilityCaledonia, WI21,8194
Allouez WaterworksGreen Bay, WI13,9322
Green Bay WaterworksGreen Bay, WI104,0572
Bellevue WaterworksGreen Bay, WI15,3651
Marshfield UtilitiesMarshfield, WI18,7081
Port Washington WaterworksPort Washington, WI11,7621
West Allis WaterworksWest Allis, WI63,2401
Cedarburg L & W CommissionCedarburg, WI11,9001
De Pere Water DepartmentDe Pere, WI23,9201
Brown Deer WaterworksBrown Deer, WI12,7411
Madison Water UtilityMadison, WI235,0001

Contaminants found in Wisconsin above health guidelines

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

Total trihalomethanes (TTHMs)
5693,922,8255713,924,451

Bromodichloromethane
5543,913,1415583,917,135

Haloacetic acids (HAA5)
5573,887,3295653,892,449

Radium, combined (-226 & -228)
9473,842,1299503,842,964

Dibromochloromethane
5183,784,4715283,857,849

Chloroform
5153,653,3715753,910,416

Trichloroacetic acid
4563,542,6964843,714,036

Dichloroacetic acid
4203,529,1604833,760,042

Dibromoacetic acid
4483,392,6754723,680,555

Nitrate and nitrite
4723,201,4406133,537,070

Nitrate
5362,862,2458273,593,289

Arsenic
4102,815,6974022,749,406

Chromium (hexavalent)
942,724,690972,799,189

Bromate
211,078,865191,079,085

Bromoform
144866,5863243,151,149

Uranium
86716,7032381,326,855

Tetrachloroethylene (perchloroethylene)
38547,29637503,249

Cadmium
59475,81070655,859

Radon
62469,50162469,501

Perfluorohexane sulfonate (PFHXS)
7298,7247298,724

Strontium
8212,2171072,999,886

Thallium
38171,60072579,222

Carbon tetrachloride
4129,1445129,170

Manganese
43107,3115193,492,753

Chlorate
899,356802,305,400

Perfluorooctane sulfonate (PFOS)
153,0006291,297

Perfluorooctanoic acid (PFOA)
131,5006269,797

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

Trichloroethylene
223,64520474,410

Dichloromethane (methylene chloride)
121,5831866,151

Di(2-ethylhexyl) phthalate
516,86339120,191

Desethylatrazine
515,39135966,108

Vinyl chloride
214,851329,851

1,4-Dioxane
111,74515553,820

Barium
47,4277883,918,775

Benzo[a]pyrene
32,59332,593

Antimony
11,176641,681,602

Chloromethane
1703133571,280

Styrene
1352936,961

1,2-Dichloroethane
1257245,290

Contaminants found in Wisconsin above legal limits