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 |
| Popeyes Liquor and Bait | Eagle River, WI | 154 | 0 | - |
| Dekorra Lutheran Church | Poynette, WI | 153 | 10 | - |
| Lake WI Evangelical Free Church | Lodi, WI | 153 | 12 | - |
| Country Heights Supper Club | Hazel Green, WI | 153 | 5 | - |
| Silver Lake Country Inn | West Bend, WI | 153 | 16 | - |
| Jamestown East Condominium Owners Association | West Bend, WI | 153 | 8 | - |
| Kamado Flo at the Swan Barn Door | Wisconsin Dells, WI | 153 | 6 | - |
| Pumpkin Center Tap | Juneau, WI | 152 | 0 | - |
| Wild Goose Station | Juneau, WI | 152 | 0 | - |
| Sweet Minnihaha Campground Shower Dump Station | Brodhead, WI | 152 | 0 | - |
| Lous Riverview | Jefferson, WI | 152 | 15 | - |
| Silver Lake Mobil | Silver Lake, WI | 152 | 27 | - |
| Melody Park Campground Camp Well | Twin Lakes, WI | 152 | 13 | - |
| New Frontiers Preschool | Fox Point, WI | 152 | 2 | - |
| Kellys Bleachers II | Wind Lake, WI | 152 | 12 | - |
| Wallers on the Lake | West Bend, WI | 152 | 29 | - |
| St Mary of the Hill Parish Church | Hubertus, WI | 152 | 10 | - |
| Server Products | Richfield, WI | 152 | 0 | - |
| Calvary Evangelical Free Church | Muskego, WI | 152 | 9 | - |
| Baileys Grove Cmpgd | Fish Creek, WI | 152 | 39 | - |
| Dundees Roadhouse | Campbellsport, WI | 152 | 0 | - |
| Jims County Line | Oshkosh, WI | 152 | 35 | - |
| Wagon Wheel Campground | Briggsville, WI | 152 | 28 | - |
| Wild Bills Tap | Medford, WI | 152 | 24 | - |
| East Koshkonong Lutheran | Cambridge, WI | 151 | 10 | - |
| St Olafs Lutheran Church | Rubicon, WI | 151 | 6 | - |
| Skate Express | Watertown, WI | 151 | 12 | - |
| Emmanuel Baptist Church | Elkhorn, WI | 151 | 21 | - |
| Sterling Chalet | Hubertus, WI | 151 | 9 | - |
| Our Lady of the Holyland St Marys Catholic Ch | Malone, WI | 151 | 5 | - |
| Tigers Sports Bar & Grill | Ripon, WI | 151 | 14 | - |
| Saint Peter Catholic Church | Fond du Lac, WI | 151 | 18 | - |
| St Henry's Catholic Church | Eau Galle, WI | 151 | 8 | - |
| Barre Country Diner | West Salem, WI | 151 | 0 | - |
| Hewitt Texas Elementary School | Wausau, WI | 151 | 248 | - |
| Poynette Mobile Estates | Chicago, WI | 150 | 86 | - |
| Bristol Lutheran Church | Sun Prairie, WI | 150 | 18 | - |
| Lake Waubesa Bible Camp | Mc Farland, WI | 150 | 5 | - |
| Church of Jesus Christ of Latter-Day Saints | Madison, WI | 150 | 21 | - |
| Danville Drive Service Area | Fitchburg, WI | 150 | 1 | - |
| Horicon Rod & Gun Club | Horicon, WI | 150 | 7 | - |
| Stitzer Sanitary Dist 1 | Stitzer, WI | 150 | 28 | - |
| St Marys Catholic Church | Cassville, WI | 150 | 5 | - |
| Whitetail Bluff Camp and Resort Expansion | Cassville, WI | 150 | 4 | - |
| Crazy Horse Campground Store & Pond | Brodhead, WI | 150 | 0 | - |
| HI Point Steak House | Ridgeway, WI | 150 | 32 | - |
| Blackhawk Lake Camping Area | Highland, WI | 150 | 12 | - |
| Cornerstone Lutheran Church | Argyle, WI | 150 | 0 | - |
| Maple Park Condominiums | Prairie Du Sac, WI | 150 | 49 | - |
| Club Chapparal | Wonewoc, WI | 150 | 5 | - |