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 |
| Christian Life Assembly of God | Waunakee, WI | 46 | 1 | - |
| Van-Gogh Homes LLC | Monroe, WI | 46 | 33 | - |
| Crazy Horse Campground | Brodhead, WI | 46 | 42 | - |
| Watertown Conservation Club | Watertown, WI | 46 | 0 | - |
| Rut-Rohs Fayette Saloon | Darlington, WI | 46 | 3 | - |
| Pettits Lakeview Lodge | Milton, WI | 46 | 7 | - |
| Pettits Lakeview Lodge - Beach Club | Milton, WI | 46 | 0 | - |
| Paddock Lake Cottages | Paddock Lake, WI | 46 | 0 | - |
| River Hills Village Hall | River Hills, WI | 46 | 10 | - |
| Mequon Marketplace Wells Fargo | Mequon, WI | 46 | 0 | - |
| River Oaks of Mequon | West Allis, WI | 46 | 9 | - |
| Erin Inn | Hartford, WI | 46 | 21 | - |
| Mukwonago Town Hall | Mukwonago, WI | 46 | 0 | - |
| Wales Quick Lube & Car Wash | Wales, WI | 46 | 0 | - |
| Kar-Tech Inc | Delafield, WI | 46 | 19 | - |
| Premold Corporation | Oconomowoc, WI | 46 | 0 | - |
| Graymont Eden Kiln and Whse | Eden, WI | 46 | 0 | - |
| Graymont Eden Office | Eden, WI | 46 | 91 | - |
| Peshtigo River Cntr | Chicago, WI | 46 | 70 | - |
| Butch & Annes Pine Grove Lanes | Plymouth, WI | 46 | 9 | - |
| Manitou Girl Scout Council | Sheboygan, WI | 46 | 5 | - |
| Grace Lutheran Ch Winchester | Winchester, WI | 46 | 17 | - |
| Eau Claire Energy Cooperative | Fall Creek, WI | 46 | 32 | - |
| Christ Center Assembly of God | Hudson, WI | 46 | 0 | - |
| Price Electric Cooperative | Phillips, WI | 46 | 0 | - |
| Harmony Mobile Manor | Lodi, WI | 45 | 11 | - |
| Pine Haven Estates | Pardeeville, WI | 45 | 41 | - |
| United WI Grain Producers | Friesland, WI | 45 | 26 | - |
| Silk Exotic | Middleton, WI | 45 | 9 | - |
| Camp Brandenburg Hilltop Well 2 | Madison, WI | 45 | 9 | - |
| Hartung Brothers Inc | Madison, WI | 45 | 19 | - |
| Easy Landing | Marshall, WI | 45 | 0 | - |
| Good Shepherd Episcopal Church | Sun Prairie, WI | 45 | 0 | - |
| Pine Ridge Apts | Madison, WI | 45 | 29 | - |
| Midland United Methodist Church | Black Earth, WI | 45 | 0 | - |
| Milk Specialties Global Company Dba Actus Nutrition | Eden Prairie, WI | 45 | 11 | - |
| Alphorn Ford Inc | Monroe, WI | 45 | 96 | - |
| Parkview Apartments | Milwaukee, WI | 45 | 147 | - |
| Concord Town Hall | Oconomowoc, WI | 45 | 10 | - |
| Blackhawk Memorial Park | Woodford, WI | 45 | 25 | - |
| Rhuesters Friendly Village Tavern | Afton, WI | 45 | 7 | - |
| Sammys Hill Top | Janesville, WI | 45 | 11 | - |
| Flooring Center | Baraboo, WI | 45 | 0 | - |
| Broken Bottle Winery | Baraboo, WI | 45 | 0 | - |
| Western Kenosha Senior Center | Bristol, WI | 45 | 0 | - |
| 7-Eleven Inc | Pleasant Prairie, WI | 45 | 17 | - |
| Cedar Crest Specialties | Cedarburg, WI | 45 | 195 | - |
| Wayside Nursery | Mequon, WI | 45 | 0 | - |
| Roger Palmen Chevrolet Inc | Union Grove, WI | 45 | 30 | - |
| English Settlement Church | Burlington, WI | 45 | 3 | - |