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 |
|---|---|---|---|---|
| Galesville Waterworks | Galesville, WI | 1,679 | 38 | - |
| Shorewood Hills Waterworks | Madison, WI | 1,670 | 34 | - |
| Kettle Moraine High School & Wales Elem School | Wales, WI | 1,670 | 14 | - |
| Homestead High School | Mequon, WI | 1,650 | 79 | - |
| Stratford Waterworks | Stratford, WI | 1,643 | 129 | - |
| Cambridge Water & Sewer Utility | Cambridge, WI | 1,638 | 246 | - |
| Thorp Waterworks | Thorp, WI | 1,636 | 361 | - |
| Spring Green Waterworks | Spring Green, WI | 1,626 | 104 | - |
| Fox Lake Waterworks | Fox Lake, WI | 1,610 | 24 | - |
| WI DOT Rest Area 64 Lomira North Bound | Madison, WI | 1,601 | 36 | - |
| WI DOT Rest Area 63 Lomira South Bound | Madison, WI | 1,601 | 17 | - |
| Random Lake Waterworks | Random Lake, WI | 1,594 | 24 | - |
| Fleet Farm Muskego Main Store | Muskego, WI | 1,585 | 0 | - |
| Darien Waterworks | Darien, WI | 1,573 | 153 | - |
| Elkhart Lake Waterworks | Elkhart Lake, WI | 1,567 | 8 | - |
| Niagara Waterworks | Niagara, WI | 1,561 | 17 | - |
| Quad Graphics | Lomira, WI | 1,550 | 14 | - |
| Federal Correctional Institution | Oxford, WI | 1,550 | 90 | - |
| Sharon Waterworks | Sharon, WI | 1,549 | 327 | - |
| Kettle Moraine Correctional Institution | Madison, WI | 1,544 | 6 | - |
| Eagle River Waterworks | Eagle River, WI | 1,530 | 15 | - |
| Brooklyn Waterworks | Brooklyn, WI | 1,524 | 58 | - |
| McDonalds Mequon | Poynette, WI | 1,524 | 114 | - |
| Cleveland Waterworks | Cleveland, WI | 1,524 | 23 | - |
| River Bend Resort | Watertown, WI | 1,520 | 5 | - |
| Bangor Waterworks | Bangor, WI | 1,520 | 25 | - |
| Hurley Waterworks | Hurley, WI | 1,515 | 56 | - |
| Concordia University | Mequon, WI | 1,500 | 27 | - |
| Independence Waterworks | Independence, WI | 1,500 | 218 | - |
| Black Earth Waterworks | Black Earth, WI | 1,493 | 39 | - |
| Edgar Waterworks | Edgar, WI | 1,491 | 49 | - |
| Orfordville Waterworks | Orfordville, WI | 1,475 | 44 | - |
| Bonduel Waterworks | Bonduel, WI | 1,475 | 18 | - |
| Phillips Waterworks | Phillips, WI | 1,473 | 94 | - |
| Grantsburg Waterworks | Grantsburg, WI | 1,460 | 14 | - |
| Muscoda Waterworks | Muscoda, WI | 1,453 | 123 | - |
| Augusta Waterworks | Augusta, WI | 1,450 | 306 | - |
| Mishicot Waterworks | Mishicot, WI | 1,432 | 9 | - |
| West Baraboo Waterworks | Baraboo, WI | 1,414 | 6 | - |
| Spring Valley Waterworks | Spring Valley, WI | 1,409 | 25 | - |
| Kwik Trip #973 | Sussex, WI | 1,404 | 0 | - |
| WI DOT Rest Area 81 Southbound | Madison, WI | 1,400 | 81 | - |
| Cornell Waterworks | Cornell, WI | 1,390 | 51 | - |
| Woodville Waterworks | Woodville, WI | 1,386 | 28 | - |
| New Berlin West Middle High School | New Berlin, WI | 1,380 | 330 | Clean |
| Markesan Waterworks | Markesan, WI | 1,365 | 3 | - |
| Cadott Waterworks | Cadott, WI | 1,352 | 24 | - |
| Southern Door Sch Dist | Pulaski, WI | 1,350 | 8 | - |
| WI DOT Rest Area 82 Northbound | Madison, WI | 1,350 | 39 | - |
| Maple Bluff Waterworks | Madison, WI | 1,342 | 34 | - |