All water systems in Wisconsin
11,026 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Marsh Haven Nature Center INC Waupun · Fond du Lac County |
25 | 1 | 1 | |
|
Marsh Inn Bar Reedsville · Manitowoc County |
25 | 0 | 0 | |
|
Marshalls Hide-A-Way Bar Sturgeon Bay · Door County |
25 | 0 | 0 | |
|
Marshfield School Forest Marshfield · Wood County |
25 | 0 | 0 | |
|
Marshs View Point Resort Gordon · Douglas County |
25 | 0 | 0 | |
|
Marytown Community Athletic Club New Holstein · Fond du Lac County |
25 | 0 | 0 | |
|
Marytown Tap New Holstein · Fond du Lac County |
25 | 0 | 0 | |
|
Mas Irvington Cmpgd and Rentals LLC Menomonie · Dunn County |
25 | 0 | 0 | |
|
Maslowski Beach Bathrooms Ashland · Ashland County |
25 | 0 | 0 | |
|
Maslowski Beach East Ashland · Ashland County |
25 | 0 | 0 | |
|
Maslowski Beach Wishing Well Ashland · Ashland County |
25 | 0 | 0 | |
|
Mason Jar the Mason · Bayfield County |
25 | 0 | 0 | |
|
Mason Village Park Hand Pump Mason · Bayfield County |
25 | 0 | 0 | |
|
Materos Pub & Pizzeria Custer · Portage County |
25 | 1 | 1 | |
|
Mattoon CH of the Nazarene Mattoon · Shawano County |
25 | 0 | 0 | |
|
Mattoon Sportsman Club Park Mattoon · Shawano County |
25 | 0 | 0 | |
|
Maxi One Mini-Mart Delavan · Walworth County |
25 | 0 | 0 | |
|
McCaslin Mountain Cmpgd Hill Silver Cliff Tn · Marinette County |
25 | 0 | 0 | |
|
McCaslin Mountain Cmpgd Site 209 Silver Cliff Tn · Marinette County |
25 | 1 | 1 | |
|
McCaslin Mountain Cmpgd Site 28 Silver Cliff Tn · Marinette County |
25 | 0 | 0 | |
|
McCaslin Mountain Cmpgd Tent Silver Cliff Tn · Marinette County |
25 | 1 | 1 | |
|
McCauslin Brook Golf Course Back 9 Lakewood Tn · Oconto County |
25 | 1 | 1 | |
|
McCauslin Brook Golf Course Front 9 Lakewood Tn · Oconto County |
25 | 2 | 0 | |
|
McCoy Park Brookfield · Waukesha County |
25 | 0 | 0 | |
|
McDonalds BP Abrams Abrams Tn · Oconto County |
25 | 1 | 1 | |
|
McGraw Lake Tavern Danbury · Burnett County |
25 | 0 | 0 | |
|
McKenzie Landing Spooner · Burnett County |
25 | 0 | 0 | |
|
Meadowbrook Event Center Ladysmith · Rusk County |
25 | 0 | 0 | |
|
Mecan River Inn Coloma · Waushara County |
25 | 0 | 0 | |
|
Mee Kwon Park Barn Mequon · Ozaukee County |
25 | 0 | 0 | |
|
Meisters Place Bar & Grill New Richmond · St. Croix County |
25 | 0 | 0 | |
|
Mellen Country Club Mellen · Ashland County |
25 | 0 | 0 | |
|
Melody Mill Aniwa · Shawano County |
25 | 0 | 0 | |
|
Mels Foxx Den Thorp · Taylor County |
25 | 3 | 1 | |
|
Mels Lakeshore Resort Campground Chetek · Barron County |
25 | 0 | 0 | |
|
Menomonee Park Picnic Shelter 1 Menomonee Falls · Waukesha County |
25 | 0 | 0 | |
|
Menomonee Park Picnic Shelter 2 & 3 Menomonee Falls · Waukesha County |
25 | 0 | 0 | |
|
Mequon Rotary Park Mequon · Ozaukee County |
25 | 0 | 0 | |
|
Mercer Senior Center Mercer · Iron County |
25 | 0 | 0 | |
|
Merks Knotheads Bar Tipler · Florence County |
25 | 0 | 0 | |
|
Merry Dale Resort Rhinelander · Oneida County |
25 | 0 | 0 | |
|
Metz Bar & Grill Fremont · Winnebago County |
25 | 0 | 0 | |
|
Meyer Park Wind Lake · Racine County |
25 | 0 | 0 | |
|
Meyers Landing Mosinee · Marathon County |
25 | 0 | 0 | |
|
Michaels Landing Bar Friendship · Adams County |
25 | 0 | 0 | |
|
Michaels Landing Campground Friendship · Adams County |
25 | 0 | 0 | |
|
Mickeys Tip UP Wisconsin Rapids · Portage County |
25 | 0 | 0 | |
|
Mickis Body Shop Bar & Grill New Lisbon · Juneau County |
25 | 0 | 0 | |
|
Micksters Pub & Grill Clintonville · Shawano County |
25 | 3 | 1 | |
|
Mid Vallee Golf De Pere · Brown County |
25 | 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.