All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Washburn Waterworks Washburn · Bayfield County |
2,280 | 2 | 1 | |
|
Wautoma Water Dept Wautoma · Waushara County |
2,280 | 0 | 0 | |
|
Fredonia Waterworks Fredonia · Ozaukee County |
2,279 | 1 | 0 | |
|
Kohler Waterworks Kohler · Sheboygan County |
2,271 | 1 | 1 | |
|
Kwik Trip #1013 Richfield · Washington County |
2,253 | 0 | 0 | |
|
Geneva National Community Services Lake Geneva · Walworth County |
2,250 | 0 | 0 | |
|
Darlington Waterworks Darlington · Lafayette County |
2,235 | 2 | 2 | |
|
Cedar Grove Waterworks Cedar Grove · Sheboygan County |
2,213 | 0 | 0 | |
|
Schofield Waterworks Schofield · Marathon County |
2,205 | 2 | 1 | |
|
WI Dot Rest Area 54 Westbound Millston · Jackson County |
2,200 | 0 | 0 | |
|
Butler Waterworks Butler · Waukesha County |
2,181 | 0 | 0 | |
|
Pardeeville Waterworks Pardeeville · Columbia County |
2,151 | 0 | 0 | |
|
Cuba City Waterworks Cuba City · Grant County |
2,141 | 3 | 1 | |
|
Clinton Waterworks Clinton · Rock County |
2,119 | 0 | 0 | |
|
Prairie Village Water Trust North Prairie · Waukesha County |
2,100 | 3 | 0 | |
|
WI Dot Rest Area 53 Eastbound Millston · Jackson County |
2,090 | 0 | 0 | |
|
ST Croix Falls Waterworks St Croix Falls · Polk County |
2,079 | 1 | 0 | |
|
Loves Travel Stop Sheboygan Sheboygan · Sheboygan County |
2,070 | 4 | 1 | |
|
House on the Rock Spring Green · Iowa County |
2,025 | 2 | 2 | |
|
Redgranite Waterworks Redgranite · Waushara County |
2,019 | 0 | 0 | |
|
Cex' HA CI County |
2,002 | 0 | 0 | |
|
WI Dot Rest Area 10 Kildare Lyndon Station · Juneau County |
2,000 | 1 | 1 | |
|
WI Dot Rest Area 9 Lemonweir Lyndon Station · Juneau County |
2,000 | 1 | 1 | |
|
Crandon Waterworks Crandon · Forest County |
1,958 | 2 | 1 | |
|
Eagle Waterworks Eagle · Waukesha County |
1,950 | 1 | 1 | |
|
Harmony Grove San Dist Lodi · Columbia County |
1,950 | 0 | 0 | |
|
McDonalds Milw ST Madison · Dane County |
1,940 | 1 | 1 | |
|
Chetek Waterworks Chetek · Barron County |
1,931 | 0 | 0 | |
|
Somers Water Utility Somers · Kenosha County |
1,930 | 1 | 0 | |
|
WI Dot Rest Area 13 Aztalan Lake Mills · Jefferson County |
1,904 | 1 | 0 | |
|
WI Dot Rest Area 14 Aztalan Milford · Jefferson County |
1,904 | 1 | 0 | |
|
Sevenwinds Casino County |
1,900 | 2 | 0 | |
|
Wales Pick N Save Wales · Waukesha County |
1,900 | 1 | 1 | |
|
Trempealeau Waterworks Trempealeau · Trempealeau County |
1,888 | 1 | 1 | |
|
Hammond Waterworks Hammond · St. Croix County |
1,884 | 0 | 0 | |
|
Scott Water Utility Dist New Franken · Brown County |
1,875 | 0 | 0 | |
|
Roberts Waterworks Roberts · St. Croix County |
1,872 | 1 | 0 | |
|
Durand Waterworks Durand · Pepin County |
1,868 | 0 | 0 | |
|
Port Edwards Water Utility Port Edwards · Wood County |
1,866 | 1 | 1 | |
|
Fox Lake Correctional Institution Fox Lake · Dodge County |
1,850 | 3 | 2 | |
|
Spencer Waterworks Spencer · Marathon County |
1,848 | 4 | 2 | |
|
Adams Waterworks Adams · Adams County |
1,847 | 2 | 1 | |
|
Fontana Water Utility Fontana · Walworth County |
1,839 | 2 | 1 | |
|
New Odanah County |
1,839 | 5 | 0 | |
|
Colby Waterworks Colby · Marathon County |
1,829 | 0 | 0 | |
|
Campbellsport Waterworks Campbellsport · Fond du Lac County |
1,825 | 1 | 0 | |
|
Weyauwega Waterworks Weyauwega · Waupaca County |
1,820 | 1 | 0 | |
|
Whitehall Waterworks Whitehall · Trempealeau County |
1,820 | 2 | 1 | |
|
Kwik Trip #1108 Colgate · Waukesha County |
1,810 | 0 | 0 | |
|
Wind Point Water Dept Racine · Racine County |
1,804 | 2 | 1 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Wisconsin records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.