All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rock River Leisure Estates Coop Edgerton · Rock County |
650 | 3 | 1 | |
|
Scouting America Camp Mkjw East Camp 1 Pearson · Langlade County |
650 | 0 | 0 | |
|
WI Dot Rest Area 31 & Info Center Lacrosse La Crosse · La Crosse County |
650 | 0 | 0 | |
|
Rockland Waterworks Rockland · La Crosse County |
642 | 3 | 1 | |
|
Amer Baptist Assem Main Green Lake · Green Lake County |
640 | 2 | 1 | |
|
Camp Douglas Waterworks Camp Douglas · Juneau County |
640 | 0 | 0 | |
|
Dayspring Baptist Church INC Pewaukee · Waukesha County |
636 | 0 | 0 | |
|
Hwy 51 Truckstop Site 4488 Merrill · Lincoln County |
636 | 0 | 0 | |
|
Cochrane Fountain City School Fountain City · Buffalo County |
635 | 0 | 0 | |
|
Eleva Waterworks Eleva · Trempealeau County |
635 | 10 | 0 | |
|
Carter Community County |
634 | 1 | 0 | |
|
Brownsville Waterworks Brownsville · Dodge County |
630 | 2 | 1 | |
|
Tonawanda Elementary School Elm Grove · Waukesha County |
628 | 0 | 0 | |
|
Lake Country School Delafield · Waukesha County |
623 | 0 | 0 | |
|
Bruce Waterworks Bruce · Rusk County |
620 | 1 | 1 | |
|
Calvary Community Church Original Bldg 1972 Williams Bay · Walworth County |
620 | 0 | 0 | |
|
Laconia High School and Middle School Rosendale · Fond du Lac County |
620 | 0 | 0 | |
|
Bluemkes BP Rosendale · Fond du Lac County |
616 | 0 | 0 | |
|
Kinney Lake Cmpgd Site 701 Marion · Waupaca County |
615 | 2 | 1 | |
|
Mequon Trail Townhomes Mequon · Ozaukee County |
615 | 2 | 1 | |
|
WI Dnr Devils Lake Quartzite Campground Baraboo · Sauk County |
615 | 0 | 0 | |
|
Olivia Telschow LLC Merrill · Lincoln County |
612 | 0 | 0 | |
|
Birds Eye Foods Darien · Walworth County |
610 | 1 | 1 | |
|
Ferguson Orchard-Eau Claire Eau Claire · Eau Claire County |
610 | 0 | 0 | |
|
Hubbleton Brewing Taproom & Grill Watertown · Jefferson County |
610 | 0 | 0 | |
|
Reserve at Hartford the Hartford · Washington County |
610 | 0 | 0 | |
|
Ridgeland County |
608 | 1 | 0 | |
|
Luckys Bar & Grille on the Lake Lodi · Columbia County |
606 | 0 | 0 | |
|
ST Marys School & ST Marys Parish Elm Grove · Waukesha County |
606 | 0 | 0 | |
|
Saron United Church of Christ Sheboygan Falls · Sheboygan County |
603 | 0 | 0 | |
|
Wicked Events and Rodeo Arena Medford · Taylor County |
603 | 4 | 1 | |
|
Christ Church Mequon Mequon · Ozaukee County |
600 | 0 | 0 | |
|
Elmbrook Lake Country Hartland · Waukesha County |
600 | 4 | 1 | |
|
Huntington Park Mequon · Ozaukee County |
600 | 0 | 0 | |
|
Iron River Sanitary District Iron River · Bayfield County |
600 | 5 | 1 | |
|
Peace Lutheran Church Dresser · Polk County |
600 | 0 | 0 | |
|
ST Marys Catholic Church Auburndale · Wood County |
600 | 0 | 0 | |
|
WI Dnr Wyalusing Central Pump House Bagley · Grant County |
600 | 0 | 0 | |
|
Bristol Waterworks Village of Bristol · Kenosha County |
598 | 1 | 1 | |
|
Neosho Station Neosho · Dodge County |
596 | 0 | 0 | |
|
Emagine Geneva Lakes Lake Geneva · Walworth County |
592 | 0 | 0 | |
|
Soldiers Grove Waterworks Soldiers Grove · Crawford County |
592 | 2 | 0 | |
|
Riverside Elementary School Ringle · Marathon County |
590 | 3 | 1 | |
|
North Freedom Waterworks North Freedom · Sauk County |
589 | 1 | 1 | |
|
Delafield Square Delafield · Waukesha County |
587 | 0 | 0 | |
|
Lena Waterworks Lena · Oconto County |
585 | 2 | 0 | |
|
Victory CH Waupaca · Waupaca County |
585 | 0 | 0 | |
|
Wausaukee Waterworks Wausaukee · Marinette County |
585 | 2 | 1 | |
|
Nrf Viii Autumn Grove LLC Brookfield · Waukesha County |
578 | 0 | 0 | |
|
Arbor Vitae Woodruff EL Sch Arbor Vitae · Vilas County |
575 | 0 | 0 |
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.