Public Water Systems
10,988 active public water systems in WI, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Richfield Middle School | Richfield, WI | 410 | 11 | - |
| Casa Tequila | Hartford, WI | 410 | 2 | - |
| Squires Grove | Elm Grove, WI | 410 | 69 | - |
| Lake Country Classical Academy East Campus | Oconomowoc, WI | 410 | 8 | - |
| Johnsonville Countryside Complex | Sheboygan Falls, WI | 410 | 23 | - |
| Rock Falls Raceway Main Bldg | Eau Claire, WI | 410 | 15 | - |
| Petenwell Co Park 10-West Pump House | Friendship, WI | 410 | 0 | - |
| Pigeon Falls Waterworks | Pigeon Falls, WI | 409 | 18 | - |
| Lakewood School | Twin Lakes, WI | 408 | 34 | - |
| Friess Lake Elementary School | Richfield, WI | 407 | 145 | - |
| Eastman Waterworks | Eastman, WI | 407 | 36 | - |
| Ehlenbachs Cheese Chalet | De Forest, WI | 406 | 0 | - |
| St Pauls Ev Lutheran Church | Ixonia, WI | 406 | 19 | - |
| Welcome Mart | Grafton, WI | 405 | 9 | - |
| Lake Lawn Resort 3 Main Well | Delavan, WI | 405 | 60 | - |
| Erin School | Hartford, WI | 405 | 37 | - |
| Petenwell Co Park 9 | Friendship, WI | 405 | 0 | - |
| First Christian Church | Kenosha, WI | 404 | 4 | - |
| Kenickys Public House | Richfield, WI | 404 | 26 | - |
| Scenic View Country Club | Slinger, WI | 403 | 67 | - |
| Magee Elementary | Wales, WI | 403 | 3 | - |
| DE Soto High-Middle School | DeSoto, WI | 403 | 185 | - |
| Ozaukee Congreg Church & Parish House | Grafton, WI | 402 | 29 | - |
| Luther Valley Church | Beloit, WI | 401 | 2 | - |
| Ozaukee Congreg Fellowship Hall | Grafton, WI | 401 | 25 | - |
| St James Cath Ch Hall | Princeton, WI | 401 | 0 | - |
| St James Cath Ch | Princeton, WI | 401 | 11 | - |
| Cascade Mtn Ski - Daisy Restaurant Well | Portage, WI | 400 | 0 | - |
| Lake Forest Water Coop | Madison, WI | 400 | 227 | - |
| Windsor Water Utility North | Windsor, WI | 400 | 33 | - |
| Sunset Ridge Elementary School | Middleton, WI | 400 | 4 | - |
| St Boniface Catholic Church | Lavalle, WI | 400 | 0 | - |
| Knolls Water Cooperative | Hinsdale, WI | 400 | 39 | - |
| Hales Happiness Subdivision | Hales Corners, WI | 400 | 93 | - |
| St Johns Ev Lutheran Church Oak Creek | Oak Creek, WI | 400 | 16 | - |
| Glen Oaks Office Park | Mequon, WI | 400 | 11 | - |
| WI DNR Harrington Beach Shower Bldg | Madison, WI | 400 | 16 | - |
| Harvest View Mhc | Northbrook, WI | 400 | 526 | - |
| Western Village | Oak Brook, WI | 400 | 70 | - |
| Smolenski Park | Mt Pleasant, WI | 400 | 30 | - |
| Pioneer Estates of Delavan | Milwaukee, WI | 400 | 416 | - |
| Camp Juniper Knoll | East Troy, WI | 400 | 19 | - |
| Marian Heights Subdivision | Elm Grove, WI | 400 | 277 | - |
| Village Court LLC | St Clair Shores, WI | 400 | 21 | - |
| Christian Education Leadership Academy | Pewaukee, WI | 400 | 0 | - |
| Manor Hill Mobile Home Park | Farmington Hills, WI | 400 | 15 | - |
| WI DNR Kmsfnu Long Lake Pumphouse | Madison, WI | 400 | 12 | - |
| Abrams Elementary School | Oconto Falls, WI | 400 | 20 | - |
| Aldrich Chemical Co | Sheboygan Falls, WI | 400 | 93 | - |
| Waupaca High Sch | Waupaca, WI | 400 | 0 | - |