All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Northview Elementary School Howards Grove · Sheboygan County |
435 | 0 | 0 | |
|
Saputo Cheese USA INC Waupun Waupun · Fond du Lac County |
435 | 1 | 1 | |
|
Trinity EV Lutheran Church & School Marshfield · Wood County |
430 | 1 | 1 | |
|
Mill Valley School Muskego · Waukesha County |
426 | 1 | 1 | |
|
Cushing Elementary Delafield · Waukesha County |
425 | 1 | 0 | |
|
Sextonville Waterworks Sextonville · Richland County |
425 | 2 | 0 | |
|
Blue River Waterworks Blue River · Grant County |
424 | 1 | 1 | |
|
Clyman Waterworks Clyman · Dodge County |
422 | 2 | 1 | |
|
Silver Birch Ranch Dorms White Lake · Langlade County |
422 | 0 | 0 | |
|
Almond-Bancroft Public Schools Almond · Portage County |
420 | 1 | 1 | |
|
Elm Grove Lutheran School & Church Elm Grove · Waukesha County |
420 | 1 | 1 | |
|
International Crane Foundation Gateway Visitors Baraboo · Sauk County |
420 | 0 | 0 | |
|
Laconia Elementary School Rosendale · Fond du Lac County |
420 | 0 | 0 | |
|
North Hills MHP Beaver Dam · Dodge County |
420 | 2 | 1 | |
|
Silver Birch Ranch Horse Bldg and Dining Hall White Lake · Langlade County |
420 | 0 | 0 | |
|
ST Francis Borgia Educational & Activity Center Cedarburg · Ozaukee County |
420 | 0 | 0 | |
|
Villa Diann MHP Eau Claire · Eau Claire County |
420 | 3 | 1 | |
|
Hancock Waterworks Hancock · Waushara County |
419 | 5 | 1 | |
|
Bear Creek Waterworks Bear Creek · Outagamie County |
418 | 1 | 1 | |
|
Junction City Waterworks Junction City · Portage County |
416 | 0 | 0 | |
|
Fox & Hounds Restaurant Bar Hubertus · Washington County |
415 | 0 | 0 | |
|
Fox & Hounds Restaurant Kitchen Hubertus · Washington County |
415 | 0 | 0 | |
|
Sunrise Orchards Gays Mills · Crawford County |
415 | 0 | 0 | |
|
Crawfish Junction Johnson Creek · Jefferson County |
412 | 0 | 0 | |
|
Station 51 LLC Janesville · Rock County |
412 | 0 | 0 | |
|
Peace Lutheran Church Green Bay · Brown County |
411 | 0 | 0 | |
|
Agave Asador & Cantina Hartford · Washington County |
410 | 0 | 0 | |
|
Johnsonville Countryside Complex Sheboygan Falls · Sheboygan County |
410 | 1 | 1 | |
|
Lake Country Classical Academy East Campus Okauchee · Waukesha County |
410 | 0 | 0 | |
|
Petenwell CO Park 10-West Pump House Arkdale · Adams County |
410 | 0 | 0 | |
|
Richfield Middle School Richfield · Washington County |
410 | 0 | 0 | |
|
Rock Falls Raceway Main Bldg Eau Claire · Dunn County |
410 | 0 | 0 | |
|
Squires Grove Elm Grove · Waukesha County |
410 | 3 | 1 | |
|
Sunset Harbor Lodi · Columbia County |
410 | 0 | 0 | |
|
Pigeon Falls Waterworks Pigeon Falls · Trempealeau County |
409 | 0 | 0 | |
|
Lakewood School Twin Lakes · Kenosha County |
408 | 0 | 0 | |
|
Friess Lake Elementary School Hubertus · Washington County |
407 | 0 | 0 | |
|
Ehlenbachs Cheese Chalet De Forest · Dane County |
406 | 0 | 0 | |
|
ST Pauls EV Lutheran Church Ixonia · Jefferson County |
406 | 0 | 0 | |
|
Erin School Hartford · Washington County |
405 | 3 | 0 | |
|
Lake Lawn Resort 3 Main Well Delavan · Walworth County |
405 | 3 | 0 | |
|
Petenwell CO Park 9 Arkdale · Adams County |
405 | 0 | 0 | |
|
Welcome Mart Grafton · Ozaukee County |
405 | 0 | 0 | |
|
First Christian Church Kenosha · Kenosha County |
404 | 0 | 0 | |
|
Kenickys Public House Richfield · Washington County |
404 | 0 | 0 | |
|
DE Soto High-Middle School De Soto · Vernon County |
403 | 0 | 0 | |
|
Magee Elementary Genesee Depot · Waukesha County |
403 | 0 | 0 | |
|
Scenic View Country Club Slinger · Washington County |
403 | 0 | 0 | |
|
Ozaukee Congreg Church & Parish House Grafton · Ozaukee County |
402 | 0 | 0 | |
|
Luther Valley Church Beloit · Rock County |
401 | 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.