All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
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 | |
|
Melrose Mindoro United Campus Melrose · Jackson County |
800 | 2 | 1 | |
|
Pittsville Waterworks Pittsville · Wood County |
800 | 1 | 1 | |
|
Salem Grade School North Well Salem · Kenosha County |
800 | 1 | 1 | |
|
Westport Water Utility Waunakee · Dane County |
800 | 1 | 1 | |
|
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 | |
|
Elmwood Waterworks Elmwood · Pierce County |
798 | 4 | 2 | |
|
WI Dnr Gov Nelson 3 Office & Shop Waunakee · Dane County |
795 | 0 | 0 | |
|
Stoddard Waterworks Stoddard · Vernon County |
793 | 3 | 1 | |
|
Plain Waterworks Plain · Sauk County |
792 | 2 | 1 | |
|
Sevenwinds Lodge and Convention Center County |
782 | 1 | 0 | |
|
Friendship Waterworks Friendship · Adams County |
781 | 4 | 1 | |
|
WI Heights High School Mazomanie · Dane County |
780 | 0 | 0 | |
|
Cassville Waterworks Cassville · Grant County |
777 | 1 | 1 | |
|
Alma Waterworks Alma · Buffalo County |
769 | 3 | 1 | |
|
Wyocena Waterworks Wyocena · Columbia County |
768 | 1 | 0 | |
|
Cambria Waterworks Cambria · Columbia County |
767 | 1 | 0 | |
|
Clayton Waterworks Clayton · Polk County |
765 | 3 | 1 | |
|
Coon Valley Waterworks Coon Valley · Vernon County |
765 | 2 | 1 | |
|
Cross Point Community Church Oconomowoc · Waukesha County |
764 | 0 | 0 | |
|
Mercer Sanitary District Mercer · Iron County |
760 | 0 | 0 | |
|
Wonewoc Waterworks Wonewoc · Juneau County |
758 | 1 | 1 | |
|
Whitelaw Waterworks Whitelaw · Manitowoc County |
757 | 3 | 1 | |
|
Lakeland Camp & Trailer Park Milton · Rock County |
755 | 0 | 0 | |
|
Wade House-Visitor Center and Museum Greenbush · Sheboygan County |
754 | 0 | 0 | |
|
The Columbian West Bend · Washington County |
752 | 0 | 0 | |
|
Emrick Lake Cmpgrnd Cabins Oxford · Adams County |
750 | 0 | 0 | |
|
Emrick Lake Cmpgrnd East Shower House Oxford · Adams County |
750 | 0 | 0 | |
|
Emrick Lake Cmpgrnd East Sites Oxford · Adams County |
750 | 0 | 0 | |
|
Emrick Lake Cmpgrnd Handpump Oxford · Adams County |
750 | 0 | 0 | |
|
Emrick Lake Cmpgrnd Main Well Oxford · Adams County |
750 | 0 | 0 | |
|
Emrick Lake Cmpgrnd Office Oxford · Adams County |
750 | 0 | 0 | |
|
Emrick Lake Cmpgrnd Reserve Area Oxford · Adams County |
750 | 0 | 0 | |
|
Glidden Sanitary District Glidden · Ashland County |
750 | 2 | 0 | |
|
Lake Meadows Water Trust Muskego · Waukesha County |
750 | 0 | 0 | |
|
Rehlko Power Systems Security Sheboygan · Sheboygan County |
750 | 0 | 0 | |
|
Wabeno Sanitary Dist 1 Wabeno · Forest County |
750 | 0 | 0 | |
|
ST Pauls Evangelical Lutheran Church Howards Grove · Sheboygan County |
735 | 0 | 0 | |
|
Mellen Water Utility Mellen · Ashland County |
731 | 0 | 0 | |
|
Iowa Grant Schools Livingston · Iowa County |
730 | 1 | 0 | |
|
Menards Old Mill Center Eau Claire · Eau Claire County |
730 | 0 | 0 | |
|
Coleman Waterworks Coleman · Marinette County |
727 | 1 | 0 | |
|
Crystal Lake RV Resort LLC Lodi · Columbia County |
725 | 1 | 1 | |
|
Jammers Wisconsin Rapids · Wood County |
725 | 0 | 0 | |
|
United Cooperative Store & Offices Beaver Dam · Dodge County |
723 | 0 | 0 | |
|
Hale Park Meadows Muskego · Waukesha County |
720 | 1 | 1 |
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.