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 |
| Jerome Drugs & Corner Market | Muskego, WI | 38 | 2 | - |
| Cornerstone Restaurant | Wales, WI | 38 | 4 | - |
| Shore Acres Homes | New Franken, WI | 38 | 0 | - |
| Shorewood Village Shops | Ephraim, WI | 38 | 32 | - |
| Fireside Restaurant | Egg Harbor, WI | 38 | 84 | - |
| Breezy Hill Campground - Main Well | Fond Du Lac, WI | 38 | 3 | - |
| Mid-State Supply | Wautoma, WI | 38 | 74 | - |
| Just N Tyme Cafe | Chippewa Falls, WI | 38 | 5 | - |
| Augusta Mennonite Church & School | Thorp, WI | 38 | 20 | - |
| Vojtiks Stockyard | Fairchild, WI | 38 | 0 | - |
| Upper Mississippi National Wildlife Refuge Visitor Center | Onalaska, WI | 38 | 0 | - |
| Dollar General Store #14069 | Galesville, WI | 38 | 0 | - |
| Preston Pines | Oconomowoc, WI | 38 | 77 | - |
| Lotters Bp | Pickerel, WI | 38 | 34 | - |
| U S N P Apostle Is Little Sand Bay Lsw01 | Bayfield, WI | 38 | 0 | - |
| Pine Forest Lodge | Mercer, WI | 38 | 4 | - |
| Otsego Yacht Club Bar & Grill | Rio, WI | 37 | 34 | - |
| Slumberland | Little Canada, WI | 37 | 0 | - |
| Maple Leaf Inc | Madison, WI | 37 | 0 | - |
| Stateline Mobile Home Park | Hazel Green, WI | 37 | 150 | - |
| Daybreak Foods Inc - Cold Spring | Lake Mills, WI | 37 | 51 | - |
| Bryant Products Inc | Ixonia, WI | 37 | 17 | - |
| Res/Taylor Creek Nurseries - Business Office | Brodhead, WI | 37 | 0 | - |
| Merrimac Estates MHP | Merrimac, WI | 37 | 21 | - |
| Shop The | North Freedom, WI | 37 | 0 | - |
| Aldo Leopold Legacy Center | Baraboo, WI | 37 | 0 | - |
| Sauk Prairie Small Animal Hospital | Prairie Du Sac, WI | 37 | 0 | - |
| Dollar General Trevor | Goodlettsville, WI | 37 | 4 | - |
| Shipyard Bar The | Port Washington, WI | 37 | 23 | - |
| Waubeka Fire Dept & Waubeka Fire Hall | Fredonia, WI | 37 | 15 | - |
| Thiensville Mill Professional Bldg | Milwaukee, WI | 37 | 70 | - |
| Seek Inc | Grafton, WI | 37 | 0 | - |
| St Marys Dover | Kansasville, WI | 37 | 0 | - |
| Front Street Shops | Rochester, WI | 37 | 0 | - |
| Hawks View Golf Club | Lake Geneva, WI | 37 | 0 | - |
| Parkside Inn | Newburg, WI | 37 | 4 | - |
| Midwest Assembly Warehouse & Distribution LLC | West Bend, WI | 37 | 0 | - |
| American Legion Post 522 | Richfield, WI | 37 | 0 | - |
| Chenequa Country Club Maintenance Shop | Hartland, WI | 37 | 0 | - |
| Citizens Bank - Vernon | Mukwonago, WI | 37 | 0 | - |
| Fleet Farm Muskego Fuel Center | Muskego, WI | 37 | 0 | - |
| Mid-State Equipment - Janesville | Janesville, WI | 37 | 5 | - |
| Tower Pallet | DE Pere, WI | 37 | 0 | - |
| Gordon Lodge Restaurant | Baileys Harbor, WI | 37 | 19 | - |
| Mikes Bar & Grill | Campbellsport, WI | 37 | 0 | - |
| Grace Ev Lutheran Ch | Dalton, WI | 37 | 11 | - |
| Stock Manufacturing Corp | Newton, WI | 37 | 68 | - |
| Apollo Tool Inc | Westfield, WI | 37 | 0 | - |
| Carew Concrete & Supply Co Inc Plant 1 | Appleton, WI | 37 | 4 | - |
| Dairiconcepts Chili | Kansas City, WI | 37 | 131 | - |