All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Shepherd of the Hills Sch Eden · Fond du Lac County |
385 | 0 | 0 | |
|
Brown Street Market Place Oconomowoc · Waukesha County |
384 | 0 | 0 | |
|
Nelson Water & Sewer Dept Nelson · Buffalo County |
375 | 1 | 1 | |
|
Rockfield School Germantown · Washington County |
375 | 3 | 2 | |
|
Solon Springs School Solon Springs · Douglas County |
375 | 0 | 0 | |
|
WI Dnr Gov Dodge Twin Valley 200 Dodgeville · Iowa County |
375 | 0 | 0 | |
|
Culvers Elm Grove Elm Grove · Waukesha County |
372 | 0 | 0 | |
|
Gilman Waterworks Gilman · Taylor County |
372 | 2 | 0 | |
|
Stillson Elementary School Chippewa Falls · Chippewa County |
371 | 2 | 0 | |
|
Lyster Lutheran Church Nelson · Buffalo County |
370 | 1 | 1 | |
|
Operating Engineers Training Ctr Coloma · Waushara County |
370 | 1 | 0 | |
|
Tiki Beach Resort Kml Campbellsport · Fond du Lac County |
370 | 0 | 0 | |
|
Boulder Creek Campground Bagley · Grant County |
368 | 1 | 1 | |
|
Camp Jcc Gym Fredonia · Ozaukee County |
368 | 0 | 0 | |
|
Tennyson Waterworks Potosi · Grant County |
367 | 2 | 0 | |
|
Dallas Waterworks Dallas · Barron County |
365 | 6 | 2 | |
|
Fairwater Waterworks Fairwater · Fond du Lac County |
365 | 0 | 0 | |
|
LA Valle Waterworks La Valle · Sauk County |
365 | 1 | 0 | |
|
Minikani YMCA Camp Halquist Family Lodge Hubertus · Washington County |
364 | 0 | 0 | |
|
Shepherd of the Hills Church New Hubertus · Washington County |
364 | 0 | 0 | |
|
Vernon Child Development Center Foundation Big Bend · Waukesha County |
364 | 1 | 0 | |
|
Howards Grove High School & District Office Howards Grove · Sheboygan County |
360 | 0 | 0 | |
|
Station Ixonia Ixonia · Jefferson County |
360 | 0 | 0 | |
|
Sunset on the Water Grill & Bar Fond Du Lac · Fond du Lac County |
360 | 0 | 0 | |
|
West Middleton Elementary School Verona · Dane County |
360 | 0 | 0 | |
|
Warehouse the Monroe · Green County |
359 | 0 | 0 | |
|
Bowler Waterworks Bowler · Shawano County |
357 | 1 | 1 | |
|
Blackhawk RV Eagle Hill Milton · Rock County |
356 | 0 | 0 | |
|
Blackhawk RV LLC 1 Restaurant Milton · Rock County |
356 | 0 | 0 | |
|
Maribel Waterworks Maribel · Manitowoc County |
355 | 0 | 0 | |
|
Bagley Waterworks Bagley · Grant County |
353 | 1 | 0 | |
|
Pelican Elementary School Rhinelander · Oneida County |
353 | 1 | 1 | |
|
Kenosha Beef International & Birchwood Foods Kenosha · Kenosha County |
352 | 1 | 1 | |
|
West Koshkonong Lutheran Church Stoughton · Dane County |
352 | 1 | 0 | |
|
Cazenovia Waterworks Cazenovia · Richland County |
351 | 3 | 1 | |
|
LA Crosse Estates LLC La Crosse · La Crosse County |
351 | 0 | 0 | |
|
Blackhawk RV LLC 3 Wigwam Milton · Rock County |
350 | 0 | 0 | |
|
Camp Luther Shower House Well Three Lakes · Oneida County |
350 | 0 | 0 | |
|
Fitchburg Utility Dist 1 South Fitchburg · Dane County |
350 | 0 | 0 | |
|
Good Shepherd Lutheran Church Crandon · Forest County |
350 | 0 | 0 | |
|
Goodman Sanitary Dist NO 1 Goodman · Marinette County |
350 | 6 | 1 | |
|
Grant Elementary School Wisconsin Rapids · Portage County |
350 | 0 | 0 | |
|
Honey Rock Camp Chrouser Center Three Lakes · Oneida County |
350 | 0 | 0 | |
|
Land O Lakes INC Cheese Div Spencer · Marathon County |
350 | 2 | 0 | |
|
Main ST Eds Argonne · Forest County |
350 | 0 | 0 | |
|
Nashotah House Delafield · Waukesha County |
350 | 1 | 0 | |
|
Nasonville Elementary School Marshfield · Wood County |
350 | 1 | 0 | |
|
Northwood School Minong · Washburn County |
350 | 2 | 0 | |
|
Prairie Farm High School Prairie Farm · Barron County |
350 | 1 | 0 | |
|
Rainbow Lake Manor MHP Bristol · Kenosha County |
350 | 2 | 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.