All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Owen Waterworks Owen · Clark County |
936 | 0 | 0 | |
|
Plainfield Waterworks Plainfield · Waushara County |
924 | 0 | 0 | |
|
Shiocton Utilities Shiocton · Outagamie County |
921 | 0 | 0 | |
|
Cedar Lake Speedway-East Well New Richmond · St. Croix County |
919 | 0 | 0 | |
|
Cedar Lake Speedway-West Well New Richmond · St. Croix County |
919 | 0 | 0 | |
|
Milltown Waterworks Milltown · Polk County |
915 | 0 | 0 | |
|
Petro Travel Plaza #403 Portage · Columbia County |
915 | 0 | 0 | |
|
Seven Mile Fair Pumphouse Well Caledonia · Racine County |
914 | 0 | 0 | |
|
Pride of America Campground Main System Wells 1 2 and 4 Pardeeville · Columbia County |
912 | 0 | 0 | |
|
Walgreens in Mequon Mequon · Ozaukee County |
912 | 0 | 0 | |
|
Kwik Trip 360 Oconomowoc Oconomowoc · Waukesha County |
906 | 0 | 0 | |
|
Centuria Waterworks Centuria · Polk County |
900 | 0 | 0 | |
|
WI Dnr Devils Lake South Picnic Area Baraboo · Sauk County |
900 | 0 | 0 | |
|
Brakebush Bros INC Westfield · Marquette County |
898 | 0 | 0 | |
|
Elk Mound Waterworks Elk Mound · Dunn County |
895 | 0 | 0 | |
|
Lone Rock Waterworks Lone Rock · Richland County |
895 | 1 | 0 | |
|
Northwestern Elementary and Middle School Maple · Douglas County |
890 | 0 | 0 | |
|
Montreal Waterworks Montreal · Iron County |
887 | 2 | 1 | |
|
Mill Creek Academy Waukesha · Waukesha County |
886 | 1 | 0 | |
|
WI Dot Rest Area 106 Jamestown Kieler · Grant County |
880 | 0 | 0 | |
|
Biron Water Utility Wisconsin Rapids · Wood County |
879 | 0 | 0 | |
|
Arena Waterworks Arena · Iowa County |
877 | 0 | 0 | |
|
Generac Power Systems INC Waukesha · Waukesha County |
875 | 0 | 0 | |
|
Millgate General Store Rochester · Racine County |
875 | 0 | 0 | |
|
Brandon Waterworks Brandon · Fond du Lac County |
872 | 0 | 0 | |
|
T&s Buss INC Sullivan · Jefferson County |
864 | 0 | 0 | |
|
Allenton Sanitary District Allenton · Washington County |
860 | 0 | 0 | |
|
Stone Lake Community County |
851 | 3 | 0 | |
|
Hillcrest Estates MHP Altoona · Eau Claire County |
850 | 2 | 2 | |
|
ST Andrew Lutheran Church & Westside Christian School Middleton · Dane County |
850 | 0 | 0 | |
|
McDonalds Restaurant Poynette Poynette · Columbia County |
845 | 0 | 0 | |
|
Necedah Waterworks Necedah · Juneau County |
844 | 3 | 1 | |
|
Highland Waterworks Highland · Iowa County |
842 | 0 | 0 | |
|
Dorchester Waterworks Dorchester · Clark County |
834 | 0 | 0 | |
|
Birnamwood Waterworks Birnamwood · Shawano County |
832 | 1 | 0 | |
|
Lake Denoon Middle School Muskego · Waukesha County |
825 | 0 | 0 | |
|
Argyle Waterworks Argyle · Lafayette County |
823 | 2 | 0 | |
|
Discalced Carmelites & Holy Hill Cafe Hubertus · Washington County |
823 | 0 | 0 | |
|
American Players Theatre -Gateway Spring Green · Iowa County |
821 | 0 | 0 | |
|
Kettle Moraine Lutheran HS Jackson · Washington County |
821 | 2 | 2 | |
|
Burger King Sturtevant · Racine County |
820 | 0 | 0 | |
|
Hobart Waterworks S a 3 Hobart · Brown County |
820 | 1 | 0 | |
|
Kwik Trip Cedarburg · Ozaukee County |
817 | 0 | 0 | |
|
Footville Waterworks Footville · Rock County |
816 | 1 | 0 | |
|
Pepin Waterworks Pepin · Pepin County |
816 | 5 | 2 | |
|
Celebrations on the River La Crosse · La Crosse County |
815 | 0 | 0 | |
|
American Players Theatre Patron Spring Green · Iowa County |
810 | 0 | 0 | |
|
Blanchardville Waterworks Blanchardville · Lafayette County |
810 | 1 | 1 | |
|
Northpoint Plaza BP Poynette · Columbia County |
809 | 0 | 0 | |
|
Pioneer Plaza Richfield · Washington County |
808 | 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.