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 |
|---|---|---|---|---|
| Rice Lake Waterworks | Rice Lake, WI | 9,012 | 133 | Clean |
| Plymouth Utilities | Plymouth, WI | 8,964 | 127 | Clean |
| Pewaukee City Water and Sewer Utility | Pewaukee, WI | 8,671 | 467 | Detected |
| Monona Waterworks | Monona, WI | 8,624 | 30 | Detected |
| Delavan Waterworks | Delavan, WI | 8,451 | 88 | Clean |
| Rhinelander Water & Wastewater | Rhinelander, WI | 8,234 | 333 | Detected |
| Mukwonago Waterworks | Mukwonago, WI | 8,190 | 284 | Clean |
| Pewaukee Village Waterworks | Pewaukee, WI | 8,166 | 175 | Clean |
| Sheboygan Falls Utilities | Sheboygan Falls, WI | 8,165 | 28 | Clean |
| Muskego Water Utility | Muskego, WI | 8,150 | 108 | Clean |
| Waupun Utilities | Waupun, WI | 8,056 | 22 | Clean |
| Ashland Water Utility | Ashland, WI | 8,000 | 252 | Clean |
| Jefferson Waterworks | Jefferson, WI | 7,926 | 61 | Clean |
| Jackson Waterworks | Jackson, WI | 7,844 | 20 | Clean |
| Antigo Waterworks | Antigo, WI | 7,780 | 28 | Clean |
| Mt Horeb Waterworks | Mount Horeb, WI | 7,756 | 182 | Detected |
| Ripon Water Utility | Ripon, WI | 7,716 | 11 | Clean |
| Kimberly Waterworks | Kimberly, WI | 7,608 | 44 | Clean |
| Ledgeview TN Sanitary Dist 2 | DE Pere, WI | 7,602 | 160 | Clean |
| New London Waterworks | New London, WI | 7,187 | 447 | Detected |
| Lake Geneva Utility Commission | Lake Geneva, WI | 7,107 | 182 | Detected |
| Kronenwetter Water & Sewer Utility | Kronenwetter, WI | 6,931 | 16 | Clean |
| Fox Point Waterworks | Fox Point, WI | 6,808 | 10 | Clean |
| Lake Hallie Waterworks Village Of | Lake Hallie, WI | 6,701 | 61 | Clean |
| Town of Brookfield San Dist 4 | Brookfield, WI | 6,419 | 216 | Detected |
| Rib Mountain Water Utility | Wausau, WI | 6,398 | 10 | Detected |
| Lake Mills Waterworks | Lake Mills, WI | 6,211 | 159 | Clean |
| Waupaca Waterworks | Waupaca, WI | 6,062 | 41 | Detected |
| Prairie Du Chien Waterworks | Prairie Du Chien, WI | 6,005 | 89 | Detected |
| Evansville Waterworks | Evansville, WI | 5,703 | 83 | Clean |
| Slinger Water Utility | Slinger, WI | 5,659 | 29 | Detected |
| Milton Waterworks | Milton, WI | 5,588 | 86 | Clean |
| Berlin Waterworks | Berlin, WI | 5,524 | 86 | Clean |
| Edgerton Waterworks | Edgerton, WI | 5,512 | 51 | Clean |
| Harrison Utilities - Fka Waverly SD | Menasha, WI | 5,500 | 25 | Detected |
| Ho Chunk Casino | Black River Falls, WI | 5,486 | 0 | Clean |
| Lawrence Waterworks | DE Pere, WI | 5,398 | 90 | Clean |
| Waterford Waterworks | Waterford, WI | 5,368 | 356 | Clean |
| Columbus Utilities | Columbus, WI | 5,173 | 151 | Clean |
| Mayville Waterworks | Mayville, WI | 5,112 | 60 | Clean |
| Richland Center Waterworks | Richland Center, WI | 5,100 | 10 | Clean |
| East Troy Waterworks | East Troy, WI | 5,054 | 91 | Detected |
| West Salem Waterworks | West Salem, WI | 5,045 | 15 | Clean |
| North Fond Du Lac Waterworks | North Fond Du Lac, WI | 5,014 | 86 | Clean |
| Shawano Lk San Dist 1 | Shawano, WI | 4,950 | 19 | Detected |
| Union Grove Waterworks | Union Grove, WI | 4,900 | 71 | Clean |
| Suamico Waterworks | Suamico, WI | 4,697 | 25 | Clean |
| Clintonville Utilities | Clintonville, WI | 4,635 | 228 | Clean |
| Oconto Waterworks | Oconto, WI | 4,610 | 33 | Clean |
| Windsor Water Utility South | Windsor, WI | 4,607 | 16 | - |