All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
WI Dnr Council Grnds Family Cmpgd Merrill · Lincoln County |
150 | 1 | 1 | |
|
WI Dnr Harrington Beach Campground Handpump Belgium · Ozaukee County |
150 | 1 | 0 | |
|
WI Dnr Indian Mds Cmpgd 4 Woodruff · Oneida County |
150 | 0 | 0 | |
|
WI Dnr Indian Mds Cmpgd 5 Woodruff · Oneida County |
150 | 0 | 0 | |
|
WI Dnr Indian Mds Cmpgd 6 Woodruff · Oneida County |
150 | 0 | 0 | |
|
WI Dnr Kmsf Lapham Peak Homestead Hollow Delafield · Waukesha County |
150 | 1 | 0 | |
|
WI Dnr Kmsfnu Mauthe LK Contact Station Campbellsport · Fond du Lac County |
150 | 0 | 0 | |
|
WI Dnr Perrot 3 Sand Cliff Trempealeau · Trempealeau County |
150 | 0 | 0 | |
|
WI Dnr Star LK Cmpgd 25 B L Sayner · Vilas County |
150 | 0 | 0 | |
|
WI Dnr Star LK East 21 Boat Landing Sayner · Vilas County |
150 | 0 | 0 | |
|
WI Dnr Star LK East Cmpgd 22 Sayner · Vilas County |
150 | 0 | 0 | |
|
WI Dnr Star LK East Cmpgd 23 Sayner · Vilas County |
150 | 0 | 0 | |
|
WI Dnr Star LK West Cmpgd 24 Sayner · Vilas County |
150 | 0 | 0 | |
|
WI Dnr Starrett LK Cmpgd 30 BT Lndng Sayner · Vilas County |
150 | 1 | 1 | |
|
Woodside Ranch LLC East Mauston · Juneau County |
150 | 1 | 0 | |
|
Woodside Ranch LLC West Mauston · Juneau County |
150 | 0 | 0 | |
|
YMCA Camp Manitou South Wash House New Auburn · Chippewa County |
150 | 0 | 0 | |
|
Zion Evangelical Lutheran Church Allenton · Washington County |
150 | 0 | 0 | |
|
Zion Lutheran Sch Wayside Greenleaf · Brown County |
150 | 0 | 0 | |
|
American Players Theatre -Touchstone Spring Green · Iowa County |
149 | 0 | 0 | |
|
Evergreen Lodge Boulder Jct · Vilas County |
149 | 0 | 0 | |
|
Alsum Farms & Produce INC Drinking Water System Friesland · Columbia County |
145 | 1 | 0 | |
|
Cortland Acres Sparta · Monroe County |
145 | 4 | 1 | |
|
Fremont Elementary School Fremont · Waupaca County |
145 | 0 | 0 | |
|
Kingdom Hall Jehovahs Witnesses Hudson · St. Croix County |
145 | 0 | 0 | |
|
Maizefield MHC (manufactured Home Community) Mosinee · Marathon County |
145 | 2 | 1 | |
|
Nasonville Dairy Marshfield · Wood County |
145 | 1 | 0 | |
|
North Lakeland School Manitowish Wtrs · Vilas County |
145 | 0 | 0 | |
|
Owen Mennonite Church & School Owen · Clark County |
145 | 1 | 1 | |
|
Pine River School for Young Learners Merrill · Lincoln County |
145 | 0 | 0 | |
|
University Lake Upper School & Fine Arts Building Hartland · Waukesha County |
145 | 1 | 1 | |
|
Maple Plain County |
144 | 1 | 0 | |
|
Oakton Beach Pewaukee · Waukesha County |
144 | 1 | 0 | |
|
Timber Lee Chris Ctr Oakridge Lodge East Troy · Walworth County |
144 | 0 | 0 | |
|
White Stone Community Church Oconomowoc · Waukesha County |
144 | 0 | 0 | |
|
Davids Star EV Lutheran School Jackson · Washington County |
143 | 1 | 1 | |
|
Fairview School Krakow · Oconto County |
143 | 0 | 0 | |
|
Hebron Community & Head Start Building Hebron · Jefferson County |
143 | 0 | 0 | |
|
Martintown Community Church Martintown · Green County |
142 | 0 | 0 | |
|
MT Horeb United Methodist Church Mount Horeb · Dane County |
142 | 0 | 0 | |
|
Oakwood Park Golf Course Franklin · Milwaukee County |
142 | 0 | 0 | |
|
Camp Evelyn Crystal House Well Plymouth · Sheboygan County |
141 | 0 | 0 | |
|
Camp Evelyn Gemini Bldgs Well Plymouth · Sheboygan County |
141 | 0 | 0 | |
|
Camp Evelyn Main Well Plymouth · Sheboygan County |
141 | 0 | 0 | |
|
New Testament Baptist Church Columbus · Columbia County |
141 | 0 | 0 | |
|
Norris INC Mukwonago · Waukesha County |
141 | 5 | 4 | |
|
Timber Lee Chris Ctr Tamarack East Troy · Walworth County |
141 | 1 | 0 | |
|
59ers Driving Range Milton · Rock County |
140 | 0 | 0 | |
|
Bethany Lutheran Church Aniwa · Marathon County |
140 | 0 | 0 | |
|
Bluffview Commons La Crosse · La Crosse County |
140 | 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.