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 |
|---|---|---|---|---|
| Black Creek Waterworks | Black Creek, WI | 1,336 | 11 | - |
| Elroy Waterworks | Elroy, WI | 1,333 | 37 | - |
| Montello Waterworks | Montello, WI | 1,329 | 35 | - |
| Hillsboro Waterworks | Hillsboro, WI | 1,325 | 93 | - |
| Fox Bros Piggly Wiggly Inc - Hubertus | Hubertus, WI | 1,314 | 15 | - |
| Loyal Waterworks | Loyal, WI | 1,308 | 39 | - |
| Manawa Waterworks | Manawa, WI | 1,300 | 29 | - |
| Marion Waterworks | Marion, WI | 1,293 | 4 | - |
| Blair Waterworks | Blair, WI | 1,280 | 199 | - |
| Fall Creek Waterworks | Fall Creek, WI | 1,269 | 65 | - |
| Road Ranger Travel Center | Rockford, WI | 1,267 | 17 | - |
| Gillett Waterworks | Gillett, WI | 1,264 | 48 | - |
| Theresa Waterworks | Theresa, WI | 1,262 | 232 | - |
| Barneveld Waterworks | Barneveld, WI | 1,258 | 35 | - |
| Elmbrook Memorial Hospital | Brookfield, WI | 1,250 | 169 | - |
| McDonalds Vernon | Waukesha, WI | 1,250 | 118 | - |
| Florence Utility Commission | Florence, WI | 1,250 | 2 | - |
| Iola Waterworks | Iola, WI | 1,249 | 25 | - |
| Frederic Waterworks | Frederic, WI | 1,241 | 25 | - |
| Wisconsin Veterans Home | King, WI | 1,240 | 26 | - |
| Culvers of Newville | Portage, WI | 1,233 | 102 | - |
| Shullsburg Waterworks | Shullsburg, WI | 1,222 | 7 | Clean |
| Monticello Waterworks | Monticello, WI | 1,217 | 5 | - |
| Rockvale MHP | Farmington Hills, WI | 1,200 | 23 | - |
| Wilmot Union High School | Wilmot, WI | 1,200 | 1,121 | - |
| Reedsville Waterworks | Reedsville, WI | 1,200 | 67 | - |
| Wittenberg Waterworks | Wittenberg, WI | 1,200 | 16 | - |
| Lakeland University | Plymouth, WI | 1,200 | 21 | - |
| Hazel Green Waterworks | Hazel Green, WI | 1,193 | 52 | - |
| Hilbert Waterworks | Hilbert, WI | 1,176 | 14 | Clean |
| Princeton Waterworks | Princeton, WI | 1,166 | 98 | - |
| Luck Waterworks | Luck, WI | 1,150 | 7 | - |
| Merton Intermediate & Primary School | Merton, WI | 1,130 | 21 | - |
| Cashton Waterworks | Cashton, WI | 1,120 | 48 | - |
| Amherst Waterworks | Amherst, WI | 1,119 | 8 | - |
| Dane Waterworks | Dane, WI | 1,117 | 41 | - |
| WI DNR Devils Lake North Shore | Baraboo, WI | 1,115 | 56 | - |
| Pleasant Springs Travel Plaza | Kenosha, WI | 1,110 | 15 | - |
| Kwik Trip 323 Verona | La Crosse, WI | 1,108 | 18 | - |
| WI DNR Devils Lake East Campground | Baraboo, WI | 1,102 | 68 | - |
| Colfax Waterworks | Colfax, WI | 1,102 | 17 | - |
| Glenwood City Waterworks | Glenwood City, WI | 1,102 | 25 | - |
| Strum Waterworks | Strum, WI | 1,100 | 357 | - |
| Oakhill Correctional Inst | Oregon, WI | 1,096 | 19 | - |
| Rio Waterworks | Rio, WI | 1,095 | 69 | - |
| McDonalds Newville | Edgerton, WI | 1,085 | 49 | - |
| Greenwood Waterworks | Greenwood, WI | 1,079 | 22 | - |
| Turtle Lake Waterworks | Turtle Lake, WI | 1,073 | 143 | - |
| Dickeyville Waterworks | Dickeyville, WI | 1,069 | 100 | - |
| Robert William Park Water Association Inc | Milwaukee, WI | 1,065 | 56 | - |