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 |
|---|---|---|---|---|
| Sheboygan TN Waterworks | Sheboygan, WI | 4,596 | 8 | Detected |
| Dodgeville Waterworks | Dodgeville, WI | 4,583 | 17 | Clean |
| Mauston Waterworks | Mauston, WI | 4,456 | 17 | Clean |
| Baldwin Waterworks | Baldwin, WI | 4,440 | 19 | Clean |
| Viroqua Waterworks | Viroqua, WI | 4,362 | 31 | Clean |
| Medford Waterworks | Medford, WI | 4,318 | 256 | Detected |
| Kewaskum Waterworks | Kewaskum, WI | 4,309 | 137 | Detected |
| Saukville Waterworks | Saukville, WI | 4,268 | 4 | Detected |
| Prescott Waterworks | Prescott, WI | 4,258 | 78 | Detected |
| Chilton Waterworks | Chilton, WI | 4,191 | 11 | Clean |
| Cross Plains Waterworks | Cross Plains, WI | 4,100 | 18 | Clean |
| Bloomfield, Village Of | Pell Lake, WI | 4,071 | 171 | Clean |
| Pulaski Waterworks | Pulaski, WI | 4,040 | 12 | Clean |
| Prairie Du Sac Waterworks | Prairie Du Sac, WI | 4,006 | 55 | Clean |
| Algoma TN Sanitary Dist 1 | Oshkosh, WI | 3,935 | 0 | - |
| Kiel Waterworks | Kiel, WI | 3,932 | 36 | Clean |
| Cabelas - Richfield | Richfield, WI | 3,931 | 0 | Clean |
| Yorkville Utility Dist 1 | Union Grove, WI | 3,900 | 160 | Clean |
| Lancaster Waterworks | Lancaster, WI | 3,868 | 43 | Clean |
| Marshall Waterworks | Marshall, WI | 3,862 | 43 | Clean |
| Wrightstown Waterworks | Wrightstown, WI | 3,815 | 19 | - |
| Arcadia Waterworks | Arcadia, WI | 3,737 | 47 | - |
| Waupun Correctional Inst | Madison, WI | 3,706 | 58 | Clean |
| Horicon Waterworks | Horicon, WI | 3,682 | 64 | Clean |
| Bloomer Waterworks | Bloomer, WI | 3,680 | 147 | Clean |
| Hobart Waterworks S a 1 | Hobart, WI | 3,670 | 67 | - |
| Omro Waterworks | Omro, WI | 3,629 | 8 | Clean |
| Combined Locks Waterworks | Combined Locks, WI | 3,609 | 20 | Clean |
| Black River Falls Waterworks | Black River Falls, WI | 3,608 | 45 | Detected |
| Seymour Waterworks | Seymour, WI | 3,601 | 87 | Clean |
| Waterloo Waterworks | Waterloo, WI | 3,520 | 50 | Clean |
| Sauk City Waterworks | Sauk City, WI | 3,518 | 11 | Clean |
| Stanley Waterworks | Stanley, WI | 3,500 | 106 | Clean |
| Barron Light & Water Dept | Barron, WI | 3,423 | 243 | Clean |
| Peshtigo Waterworks | Peshtigo, WI | 3,420 | 160 | Clean |
| Mosinee Waterworks | Mosinee, WI | 3,406 | 28 | - |
| Johnson Creek Waterworks | Johnson Creek, WI | 3,318 | 121 | - |
| Ellsworth Waterworks | Ellsworth, WI | 3,304 | 40 | Detected |
| Brillion Waterworks | Brillion, WI | 3,262 | 24 | Clean |
| Freedom Sanitary District | Freedom, WI | 3,260 | 21 | - |
| WI DOT Rest Area 12 Dekorra West Bound | Madison, WI | 3,255 | 53 | - |
| Boscobel Waterworks | Boscobel, WI | 3,237 | 21 | - |
| Wisconsin Dells Waterworks | Wisconsin Dells, WI | 3,232 | 32 | - |
| Algoma Waterworks | Algoma, WI | 3,219 | 0 | - |
| Brodhead Waterworks | Brodhead, WI | 3,216 | 8 | - |
| WI DOT Rest Area 14 Aztalan | Madison, WI | 3,204 | 47 | - |
| Rothschild Waterworks | Rothschild, WI | 3,190 | 176 | - |
| Ladysmith Waterworks | Ladysmith, WI | 3,184 | 112 | - |
| Tomahawk Waterworks | Tomahawk, WI | 3,180 | 29 | Detected |
| Lodi Waterworks | Lodi, WI | 3,146 | 51 | - |