PlainWater

Public Water Systems

10,988 active public water systems in WI, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.

Population Violations Health Violations Name
System Name Location Population Violations PFAS
Milwaukee Waterworks Milwaukee, WI 626,000 40 Clean
Madison Water Utility Madison, WI 272,000 327 Detected
Green Bay Waterworks Green Bay, WI 107,369 21 Clean
Racine Waterworks Racine, WI 105,100 67 Clean
Kenosha Water Utility Kenosha, WI 99,218 56 Clean
Appleton Waterworks Appleton, WI 74,511 51 Detected
Waukesha Water Utility Waukesha, WI 70,718 2,969 Clean
Eau Claire Waterworks Eau Claire, WI 70,587 8 Detected
Janesville Water Utility Janesville, WI 64,415 14 Clean
West Allis Waterworks West Allis, WI 63,240 10 Clean
Oshkosh Waterworks Oshkosh, WI 63,000 20 Clean
La Crosse Waterworks La Crosse, WI 53,000 73 Detected
Sheboygan Water Utilities Sheboygan, WI 49,931 58 Clean
Wauwatosa Waterworks Wauwatosa, WI 49,064 13 Clean
Fond Du Lac Waterworks Fond Du Lac, WI 44,303 390 Clean
Wausau Waterworks Wausau, WI 39,994 16 Detected
Beloit City Of Beloit, WI 36,677 37 Detected
North Shore Water Commission Milwaukee, WI 35,598 36 Clean
Manitowoc Waterworks Manitowoc, WI 34,500 7 Clean
Sun Prairie Utilities Sun Prairie, WI 33,966 124 Clean
Oak Creek Waterworks Oak Creek, WI 32,104 143 Clean
West Bend Waterworks West Bend, WI 31,752 291 Detected
Brookfield Water Utility Brookfield, WI 29,070 504 Detected
New Berlin Water Utility New Berlin, WI 27,899 675 Clean
Neenah Waterworks Neenah, WI 27,506 46 Clean
Stevens Point Waterworks Stevens Point, WI 26,717 14 Clean
Superior Water Light & Power Company Superior, WI 26,084 30 Clean
DE Pere Waterworks Sa 1 DE Pere, WI 25,660 296 Clean
Fitchburg Utility Dist 1 Fitchburg, WI 24,500 53 Clean
Watertown Waterworks Watertown, WI 23,945 35 Clean
Middleton Waterworks Middleton, WI 23,868 121 Clean
Menomonee Falls Ww - Surface Water Menomonee Falls, WI 23,867 87 Clean
Franklin Water Utility Franklin, WI 22,500 200 Clean
Caledonia Water Utility - Village Of Racine, WI 21,819 29 Clean
Grand Chute TN San Dist 1 Grand Chute, WI 21,583 38 Clean
South Milwaukee Waterworks South Milwaukee, WI 21,340 96 Clean
Howard Waterworks Green Bay, WI 21,133 86 Clean
Germantown Water Utility Germantown, WI 20,027 329 Clean
Wis Rapids Water Works & Lighting Comm Wisconsin Rapids, WI 20,000 29 Clean
Marshfield Utilities Marshfield, WI 18,815 18 Detected
Cudahy Waterworks Cudahy, WI 18,659 63 Clean
Fox Crossing Utilities West Neenah, WI 18,000 6 Clean
Onalaska Waterworks Onalaska, WI 18,000 25 Detected
Ashwaubenon Waterworks Ashwaubenon, WI 17,730 117 Clean
Hudson Waterworks Hudson, WI 17,635 16 Detected
Kaukauna Utilities Kaukauna, WI 17,493 56 Clean
Bellevue Waterworks Green Bay, WI 16,715 229 Clean
Beaver Dam Water Utility Beaver Dam, WI 16,200 13 Clean
River Falls Waterworks River Falls, WI 16,000 9 Clean
Weston Municipal Utilities Weston, WI 16,000 159 Detected
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