All water systems in Wisconsin
9,089 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
WI Dot Rest Area 12 Dekorra West Bound Poynette · Columbia County |
3,255 | 0 | 0 | |
|
Woodside Sports Complex Mauston · Juneau County |
3,008 | 0 | 0 | |
|
WI Dot Rest Area 22 Turtle Beloit · Rock County |
3,005 | 0 | 0 | |
|
WI Dot Rest Area 11 Dekorra East Bound Poynette · Columbia County |
2,505 | 0 | 0 | |
|
WI Dot Rest Area 17 Milton Janesville · Rock County |
2,503 | 0 | 0 | |
|
WI Dot Rest Area 54 Westbound Millston · Jackson County |
2,200 | 0 | 0 | |
|
WI Dot Rest Area 53 Eastbound Millston · Jackson County |
2,090 | 0 | 0 | |
|
WI Dot Rest Area 10 Kildare Lyndon Station · Juneau County |
2,000 | 1 | 1 | |
|
WI Dot Rest Area 9 Lemonweir Lyndon Station · Juneau County |
2,000 | 1 | 1 | |
|
WI Dot Rest Area 13 Aztalan Lake Mills · Jefferson County |
1,904 | 1 | 0 | |
|
WI Dot Rest Area 14 Aztalan Milford · Jefferson County |
1,904 | 1 | 0 | |
|
Kwik Trip #1108 Colgate · Waukesha County |
1,810 | 0 | 0 | |
|
WI Dot Rest Area 63 Lomira South Bound Lomira · Dodge County |
1,601 | 0 | 0 | |
|
WI Dot Rest Area 64 Lomira North Bound Lomira · Dodge County |
1,601 | 0 | 0 | |
|
McDonalds Mequon Mequon · Ozaukee County |
1,524 | 1 | 1 | |
|
River Bend Resort Watertown · Jefferson County |
1,520 | 0 | 0 | |
|
Kwik Trip #973 Sussex · Waukesha County |
1,404 | 0 | 0 | |
|
WI Dot Rest Area 81 Southbound Westfield · Marquette County |
1,400 | 0 | 0 | |
|
WI Dot Rest Area 82 Northbound Westfield · Marquette County |
1,350 | 0 | 0 | |
|
Road Ranger Travel Center Cottage Grove · Dane County |
1,267 | 0 | 0 | |
|
WI Dnr Devils Lake North Shore Baraboo · Sauk County |
1,115 | 1 | 0 | |
|
Pleasant Springs Travel Plaza Cottage Grove · Dane County |
1,110 | 0 | 0 | |
|
Kwik Trip 323 Verona Verona · Dane County |
1,108 | 0 | 0 | |
|
WI Dnr Devils Lake East Campground Baraboo · Sauk County |
1,102 | 0 | 0 | |
|
WI Dot Rest Area 52 N Cooperstown Green Bay · Manitowoc County |
1,100 | 0 | 0 | |
|
WI Dot Rest Area 51 S Cooperstown Green Bay · Manitowoc County |
1,010 | 0 | 0 | |
|
Cascade Mtn Ski 93 Well Main Portage · Columbia County |
967 | 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 | |
|
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 | |
|
WI Dnr Devils Lake South Picnic Area Baraboo · Sauk County |
900 | 0 | 0 | |
|
WI Dot Rest Area 106 Jamestown Kieler · Grant County |
880 | 0 | 0 | |
|
Millgate General Store Rochester · Racine County |
875 | 0 | 0 | |
|
T&s Buss INC Sullivan · Jefferson County |
864 | 0 | 0 | |
|
Discalced Carmelites & Holy Hill Cafe Hubertus · Washington County |
823 | 0 | 0 | |
|
American Players Theatre -Gateway Spring Green · Iowa County |
821 | 0 | 0 | |
|
Burger King Sturtevant · Racine County |
820 | 0 | 0 | |
|
Kwik Trip Cedarburg · Ozaukee County |
817 | 0 | 0 | |
|
American Players Theatre Patron Spring Green · Iowa County |
810 | 0 | 0 | |
|
Northpoint Plaza BP Poynette · Columbia County |
809 | 0 | 0 | |
|
Pioneer Plaza Richfield · Washington County |
808 | 0 | 0 | |
|
Concord General Store Oconomowoc · Jefferson County |
807 | 0 | 0 | |
|
Bateman Express Mart Chippewa Falls · Chippewa County |
800 | 0 | 0 | |
|
Holy Family Catholic Church Edgar · Marathon County |
800 | 0 | 0 | |
|
WI Dnr Willow River Cmpgd 300 Hudson · St. Croix County |
800 | 0 | 0 | |
|
WI Dot Rest Area 35 Lafayette Elkhorn · Walworth County |
800 | 0 | 0 | |
|
WI Dot Rest Area 36 Lafayette Elkhorn · Walworth County |
800 | 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 still 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. Retrieved from ECHO on Oct 11, 2026.