All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ozaukee Congreg Fellowship Hall Grafton · Ozaukee County |
401 | 0 | 0 | |
|
ST James Cath CH Neshkoro · Marquette County |
401 | 0 | 0 | |
|
ST James Cath CH Hall Neshkoro · Marquette County |
401 | 0 | 0 | |
|
Abrams Elementary School Abrams · Oconto County |
400 | 0 | 0 | |
|
Aldrich Chemical CO Sheboygan Falls · Sheboygan County |
400 | 0 | 0 | |
|
Camp Juniper Knoll East Troy · Walworth County |
400 | 0 | 0 | |
|
Camp Ramah Bet AM Conover · Vilas County |
400 | 0 | 0 | |
|
Camp Ramah Girls Well Conover · Vilas County |
400 | 0 | 0 | |
|
Camp Ramah Office Conover · Vilas County |
400 | 0 | 0 | |
|
Cascade Mtn Ski Daisy Restaurant Well Portage · Columbia County |
400 | 0 | 0 | |
|
Christian Education Leadership Academy Pewaukee · Waukesha County |
400 | 0 | 0 | |
|
Elcho Sanitary District 1 Elcho · Langlade County |
400 | 3 | 1 | |
|
Glen Oaks Office Park Mequon · Ozaukee County |
400 | 0 | 0 | |
|
Grassland Dairy Prod INC Greenwood · Clark County |
400 | 0 | 0 | |
|
Harvest View MHC Union Grove · Racine County |
400 | 2 | 0 | |
|
Kickapoo Corners Family Restaurant Readstown · Vernon County |
400 | 1 | 1 | |
|
Knolls Water Cooperative Powers Lake · Kenosha County |
400 | 0 | 0 | |
|
Lake Forest Water Coop Madison · Dane County |
400 | 4 | 1 | |
|
Lake Hallie Golf LLC Chippewa Falls · Chippewa County |
400 | 0 | 0 | |
|
Manor Hill Mobile Home Park Eden · Fond du Lac County |
400 | 1 | 0 | |
|
Marian Heights Subdivision Elm Grove · Waukesha County |
400 | 1 | 1 | |
|
Petenwell CO Park Atv Campground Arkdale · Adams County |
400 | 0 | 0 | |
|
Pioneer Estates of Delavan Delavan · Walworth County |
400 | 0 | 0 | |
|
Port Wing Sanitary District Port Wing · Bayfield County |
400 | 1 | 1 | |
|
Sand Valley Golf Resort Lido Pro Shelter & Bath Nekoosa · Adams County |
400 | 0 | 0 | |
|
Sand Valley Golf Resort Lido Pro Shop Nekoosa · Adams County |
400 | 0 | 0 | |
|
Sand Valley Golf Resort Mammoth Dunes Hole 15 Nekoosa · Adams County |
400 | 0 | 0 | |
|
Sand Valley Golf Resort Mammoth Dunes Turnstand Nekoosa · Adams County |
400 | 0 | 0 | |
|
Silver Birch Ranch Office & LK Cottage White Lake · Langlade County |
400 | 1 | 1 | |
|
Smolenski Park Mount Pleasant · Racine County |
400 | 1 | 1 | |
|
ST Johns EV Lutheran Church Oak Creek Oak Creek · Milwaukee County |
400 | 0 | 0 | |
|
Sunset Ridge Elementary School Middleton · Dane County |
400 | 0 | 0 | |
|
Village Court LLC Elm Grove · Waukesha County |
400 | 1 | 1 | |
|
Waupaca High Sch Waupaca · Waupaca County |
400 | 0 | 0 | |
|
Western Village Racine · Racine County |
400 | 0 | 0 | |
|
WI Air National Guard Volk Field Camp Douglas · Juneau County |
400 | 4 | 1 | |
|
WI Dnr Harrington Beach Shower Bldg Belgium · Ozaukee County |
400 | 1 | 0 | |
|
WI Dnr Kmsfnu Long Lake Pumphouse Cascade · Fond du Lac County |
400 | 2 | 1 | |
|
Windsor Water Utility North Morrisonville · Dane County |
400 | 0 | 0 | |
|
Wissota Express Chippewa Falls · Chippewa County |
400 | 0 | 0 | |
|
YMCA Camp ST Croix Dining Hall Hudson · St. Croix County |
400 | 0 | 0 | |
|
Schlitz Audubon Nature Center Bayside · Milwaukee County |
399 | 1 | 0 | |
|
Trinity Lutheran Church & School Caledonia · Racine County |
398 | 1 | 0 | |
|
Delavan Club Condos Delavan · Walworth County |
395 | 1 | 0 | |
|
Readstown Waterworks Readstown · Vernon County |
395 | 3 | 0 | |
|
Trevor Wilmot Consolidated School Trevor · Kenosha County |
394 | 0 | 0 | |
|
Trevor Wilmot Consolidated School Addition Trevor · Kenosha County |
394 | 0 | 0 | |
|
Tyrol Basin Chalet Mount Horeb · Dane County |
390 | 0 | 0 | |
|
Chapman Oil INC Eagle · Waukesha County |
386 | 2 | 1 | |
|
Sargento Cheese INC ST Cloud St Cloud · Fond du Lac County |
385 | 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.