All water systems in Wisconsin
9,089 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Oak Ridge Inn Tavern Danbury · Burnett County |
25 | 0 | 0 | |
|
Oak Shores Lake Side Cabins Hayward · Sawyer County |
25 | 1 | 0 | |
|
Oak Shores Parking Side Cabins Hayward · Sawyer County |
25 | 0 | 0 | |
|
Oakland New Town Hall Oakland · Douglas County |
25 | 0 | 0 | |
|
Oakwood Campsite Bathhouse Springwater Tn · Waushara County |
25 | 0 | 0 | |
|
Oakwood Campsite Tavern Springwater Tn · Waushara County |
25 | 0 | 0 | |
|
Oakwood Campsite Wendy Way Wild Rose · Waushara County |
25 | 0 | 0 | |
|
Oakwood Park Waupaca · Waupaca County |
25 | 1 | 1 | |
|
Oasis Church Tomah · Monroe County |
25 | 0 | 0 | |
|
Oasis Cmpgd & Waterpark Center Well Hancock · Waushara County |
25 | 0 | 0 | |
|
Oasis Cmpgd & Waterpark Pool & Lodge Well Hancock · Waushara County |
25 | 0 | 0 | |
|
Oasis Cmpgd Atv Shed Well Hncock · Waushara County |
25 | 0 | 0 | |
|
Oasis Cmpgd Highway Well Hancock · Waushara County |
25 | 0 | 0 | |
|
Oasis Inn Kenosha · Kenosha County |
25 | 0 | 0 | |
|
Oaw Indoor Sports Complex New Berlin · Waukesha County |
25 | 1 | 0 | |
|
Oconomowoc Town Hall Oconomowoc · Waukesha County |
25 | 0 | 0 | |
|
Oconto City Park Oconto Tn · Oconto County |
25 | 1 | 1 | |
|
Oconto Motel INC Oconto · Oconto County |
25 | 1 | 0 | |
|
Oconto River Park Pulcifer · Shawano County |
25 | 0 | 0 | |
|
Odin & Frejas Place Scandinavia · Waupaca County |
25 | 0 | 0 | |
|
Ogema Volunteer Fire Dept Ogema · Price County |
25 | 0 | 0 | |
|
Ohenrys Cmpgd Lower Well Genoa · Vernon County |
25 | 0 | 0 | |
|
Ojibwa Campground Winter · Sawyer County |
25 | 0 | 0 | |
|
Ojibwa Park Ojibwa · Sawyer County |
25 | 0 | 0 | |
|
OK Corral Park Falls · Price County |
25 | 0 | 0 | |
|
Okauchee Lions Park Okauchee · Waukesha County |
25 | 0 | 0 | |
|
Old Apostolic Lutheran Church Ashland · Ashland County |
25 | 0 | 0 | |
|
Old Crow Bar & Grill Little Suamico Tn · Oconto County |
25 | 0 | 0 | |
|
Old Finley Tavern Necedah · Juneau County |
25 | 0 | 0 | |
|
Old Still Saloon Gillett Tn · Oconto County |
25 | 2 | 0 | |
|
Old Town Hall the Townsend Tn · Oconto County |
25 | 3 | 1 | |
|
Olde World Pastries Plus Green Bay · Brown County |
25 | 0 | 0 | |
|
Olin-Sang-Ruby Union Institute Pool Well Oconomowoc · Jefferson County |
25 | 0 | 0 | |
|
Olive Pit the Townsend Tn · Oconto County |
25 | 1 | 0 | |
|
Oliver Tavern Oliver · Douglas County |
25 | 0 | 0 | |
|
Oliver Village Hall Oliver · Douglas County |
25 | 0 | 0 | |
|
Olivet Lutheran Church and Addition La Crosse · La Crosse County |
25 | 0 | 0 | |
|
Oma Town Supplemental Well Hurley · Iron County |
25 | 0 | 0 | |
|
Omaha Trail Wayside Mauston · Juneau County |
25 | 0 | 0 | |
|
ON a Whim Sweet Treats Manitowoc · Manitowoc County |
25 | 0 | 0 | |
|
ON the Rocks Kampground Gresham · Shawano County |
25 | 1 | 0 | |
|
ON the Rocks Kampground 300s North Gresham · Shawano County |
25 | 0 | 0 | |
|
ON the Rocks Kampground 300s South Gresham · Shawano County |
25 | 0 | 0 | |
|
ON the Rocks Kampground House Well Gresham · Shawano County |
25 | 0 | 0 | |
|
ON the Rocks Kampground Pavilion Gresham · Shawano County |
25 | 0 | 0 | |
|
One Barrel Brewing Egg Harbor St · Door County |
25 | 2 | 0 | |
|
One O One Florence · Florence County |
25 | 0 | 0 | |
|
Oneida Golf Snack Shack Green Bay · Brown County |
25 | 0 | 0 | |
|
Oneil Creek Cmpgd Store Chippewa Falls · Chippewa County |
25 | 0 | 0 | |
|
Ono United Methodist Church Maiden Rock · Pierce 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.