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 |
| Dollar General #25216 | Goodlettsville, WI | 30 | 4 | - |
| Ross Lodge | Wauwatosa, WI | 30 | 1 | - |
| Menomonee River Parkway Comfort House | Wauwatosa, WI | 30 | 3 | - |
| Village Glen Apts | Mequon, WI | 30 | 33 | - |
| Pw Lake View Estates LLC | Grafton, WI | 30 | 70 | - |
| Fromm Family Foods LLC | Mequon, WI | 30 | 0 | - |
| Nowhere | Fredonia, WI | 30 | 50 | - |
| Between the Greens | Saukville, WI | 30 | 3 | - |
| Successful Smiles Dental Clinic | Thiensville, WI | 30 | 11 | - |
| Tfb Enterprize Property LLC | Mequon, WI | 30 | 40 | - |
| Chase Bank-Mequon | Brookfield, WI | 30 | 0 | - |
| Fire Factory The | Port Washington, WI | 30 | 0 | - |
| Ashley Yorkville LLC - Main Building East | Chicago, WI | 30 | 34 | - |
| Oak Shores Club | Fontana, WI | 30 | 16 | - |
| Delavan Community Park | Delavan, WI | 30 | 27 | - |
| The Brick Church of Walworth | Walworth, WI | 30 | 18 | - |
| Lake Beulah Yacht Club | East Troy, WI | 30 | 21 | - |
| Snug Harbor Inn MHP | Delavan, WI | 30 | 150 | - |
| Delavan Gardens Estates Association Inc | Williams Bay, WI | 30 | 19 | - |
| Church of Jesus Christ Latter Day Saints Elkhorn | Madison, WI | 30 | 15 | - |
| South Shore Club | Lake Geneva, WI | 30 | 0 | - |
| Sandy Knoll Rangers Residence | West Bend, WI | 30 | 0 | - |
| Zimmermanns Kettle Hills Golf Course Ltd | Richfield, WI | 30 | 22 | - |
| Still Waters Community United Methodist Church | Jackson, WI | 30 | 6 | - |
| Douglas Plaza North | Waukesha, WI | 30 | 70 | - |
| Nagawaukee Pk Office W9 | Waukesha, WI | 30 | 0 | - |
| Jerusalem Presbyterian Church | Wales, WI | 30 | 2 | - |
| IN Cahoots | Genesee Depot, WI | 30 | 13 | - |
| Blessed Teresa of Calcutta Parish | North Lake, WI | 30 | 4 | - |
| Faith Springs Presbyterian Church | Pewaukee, WI | 30 | 29 | - |
| Chinook Program Ctr - Activity Station | New Berlin, WI | 30 | 10 | - |
| Retzer Nature Center | Waukesha, WI | 30 | 7 | - |
| Firemans Park | Delafield, WI | 30 | 20 | - |
| Chinook Program Ctr - Day Camp Well - Old Ranger Farmhouse | New Berlin, WI | 30 | 9 | - |
| Vernon Village Hall | Big Bend, WI | 30 | 1 | - |
| Chinook Program Ctr - New Troop House | New Berlin, WI | 30 | 0 | - |
| Ottawa Town Park | Dousman, WI | 30 | 9 | - |
| Retzer Nature Center Maintenance Building | Waukesha, WI | 30 | 0 | - |
| Quail Hollow Condos | Elm Grove, WI | 30 | 21 | - |
| Rogers Mem Hosp - Delafield 16 Bed | Oconomowoc, WI | 30 | 4 | - |
| 711 Wells St | Hartland, WI | 30 | 0 | - |
| Walsdorf Roofing Co | Kiel, WI | 30 | 102 | - |
| Aqualand Campground | Sister Bay, WI | 30 | 5 | - |
| Egg Harbor Town Park Town Hall | Sturgeon Bay, WI | 30 | 119 | - |
| Ridges Sanctuary Range Light | Baileys Harbor, WI | 30 | 45 | - |
| Harbor Ridge Winery | Stoughton, WI | 30 | 4 | - |
| Hands on Art Studio | Fish Creek, WI | 30 | 65 | - |
| Bjorklunden Conference Ctr 2 | Baileys Harbor, WI | 30 | 0 | - |
| Koepsels Farm Market | Baileys Harbor, WI | 30 | 9 | - |
| Sweetie Pies | Fish Creek, WI | 30 | 37 | - |