All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Trinity EV Lutheran School & Church Freistadt Mequon · Ozaukee County |
250 | 0 | 0 | |
|
United Parcel Service Elm Grove · Waukesha County |
250 | 0 | 0 | |
|
WI Dnr Blue Mound Fobm Shelter Blue Mounds · Iowa County |
250 | 0 | 0 | |
|
WI Dnr Blue Mound Lower Well Blue Mounds · Iowa County |
250 | 0 | 0 | |
|
WI Dnr Firefly LK Cmpgd 59 Boulder Jct · Vilas County |
250 | 0 | 0 | |
|
WI Dnr Firefly LK Cmpgd 60 Boulder Jct · Vilas County |
250 | 0 | 0 | |
|
WI Dnr Firefly LK Cmpgd 61 Boulder Jct · Vilas County |
250 | 0 | 0 | |
|
WI Dnr Firefly LK Cmpgd 62 Boulder Jct · Vilas County |
250 | 0 | 0 | |
|
WI Dnr Firefly LK Cmpgd 64 Boulder Jct · Vilas County |
250 | 0 | 0 | |
|
WI Dnr Glacial Drumlin Trail Sullivan Rst AR Delafield · Jefferson County |
250 | 2 | 1 | |
|
WI Dnr Gov Dodge Cox Hollow Open Camp Dodgeville · Iowa County |
250 | 0 | 0 | |
|
WI Dnr Kmsfsu Pine Woods Shower Bldg Dousman · Waukesha County |
250 | 0 | 0 | |
|
WI Dnr Muskellung LK Cmpgd Shower Boulder Junction · Vilas County |
250 | 0 | 0 | |
|
Wild Rose Elementary Sch Wild Rose · Waushara County |
250 | 0 | 0 | |
|
Woodland Community Church Westboro · Taylor County |
250 | 0 | 0 | |
|
Yahara Hills SW Upper Shelter Madison · Dane County |
250 | 0 | 0 | |
|
YMCA Camp Maclean Kelseys Place Burlington · Racine County |
250 | 0 | 0 | |
|
YMCA Camp Maclean Lodge Burlington · Racine County |
250 | 0 | 0 | |
|
Tibbets Elementary School Elkhorn · Walworth County |
248 | 1 | 0 | |
|
Community Church & School North Campus Campellsport · Washington County |
247 | 1 | 1 | |
|
Christmas MT Clubhouse Wisconsin Dells · Sauk County |
245 | 0 | 0 | |
|
Little Explorers Preschool Madison · Dane County |
245 | 0 | 0 | |
|
Franks Field County |
242 | 3 | 0 | |
|
ST Marks United CH of Christ Cleveland · Sheboygan County |
242 | 0 | 0 | |
|
Radisson Waterworks Radisson · Sawyer County |
241 | 7 | 1 | |
|
Bostwick Valley MHP West Salem · La Crosse County |
240 | 2 | 2 | |
|
County Line Estates Whitewater · Rock County |
240 | 1 | 0 | |
|
Manheim Milwaukee Auto Auction House & Detail Shop Caledonia · Racine County |
240 | 1 | 1 | |
|
Oxford Elementary Oxford · Marquette County |
240 | 0 | 0 | |
|
Trienda Holdings LLC Portage · Columbia County |
240 | 1 | 0 | |
|
WI Dnr Trout LK Cathedral PT Boulder Jct · Vilas County |
240 | 0 | 0 | |
|
WI Dnr Trout LK N Cmpgd 50 Boulder Junction · Vilas County |
240 | 0 | 0 | |
|
WI Dnr Trout LK N Cmpgd 51 Boulder Junction · Vilas County |
240 | 1 | 1 | |
|
WI Dnr Trout LK N Cmpgd 52 Boulder Junction · Vilas County |
240 | 0 | 0 | |
|
WI Dnr Trout LK Nat Trl 65 Boulder Junction · Vilas County |
240 | 0 | 0 | |
|
WI Dnr Trout LK South Cmpgd Site 1009 Boulder Junction · Vilas County |
240 | 0 | 0 | |
|
Weyerhaeuser Waterworks Weyerhauser · Rusk County |
238 | 1 | 0 | |
|
Dairy State Cheese Rudolph · Wood County |
235 | 1 | 0 | |
|
Ithaca Public School Gym Richland Center · Richland County |
235 | 0 | 0 | |
|
ST Paul Lutheran CH Fremont Fremont · Waupaca County |
235 | 0 | 0 | |
|
Harvest Evangelical Free Church Beaver Dam · Dodge County |
234 | 0 | 0 | |
|
Our Lady of the Holyland Parish ST John Site Malone · Fond du Lac County |
234 | 0 | 0 | |
|
Sullivan Elementary School Sullivan · Jefferson County |
233 | 0 | 0 | |
|
Fulton Congregational Church Edgerton · Rock County |
232 | 0 | 0 | |
|
WI Dot Wayside 4 Richfield Marshfield · Wood County |
232 | 0 | 0 | |
|
Xpo Logistics Franklin · Milwaukee County |
232 | 1 | 0 | |
|
Immanuel Lutheran Church Johnson Creek · Jefferson County |
231 | 0 | 0 | |
|
Shelby TN of SD 2 Arbor HL La Crosse · La Crosse County |
231 | 0 | 0 | |
|
Genesee Lake School South Oconomowoc · Waukesha County |
230 | 1 | 1 | |
|
Grande Cheese CO Brownsville Brownsville · Dodge County |
230 | 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.