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 |
|---|---|---|---|---|
| Cambria Waterworks | Cambria, WI | 767 | 52 | - |
| Clayton Waterworks | Claytoon, WI | 765 | 13 | - |
| Coon Valley Waterworks | Coon Valley, WI | 765 | 17 | - |
| Cross Point Community Church | Oconomowoc, WI | 764 | 0 | - |
| Mercer Sanitary District | Mercer, WI | 760 | 40 | - |
| Wonewoc Waterworks | Wonewoc, WI | 758 | 19 | - |
| Whitelaw Waterworks | Whitelaw, WI | 757 | 40 | - |
| Lakeland Camp & Trailer Park | Chicago, WI | 755 | 2 | - |
| Wade House-Visitor Center and Museum | Madison, WI | 754 | 6 | - |
| The Columbian | West Bend, WI | 752 | 7 | - |
| Lake Meadows Water Trust | Waukesha, WI | 750 | 702 | - |
| Rehlko Power Systems Security | Sheboygan, WI | 750 | 85 | - |
| Emrick Lake Cmpgrnd East Shower House | Lake Delton, WI | 750 | 0 | - |
| Emrick Lake Cmpgrnd Main Well | Lake Delton, WI | 750 | 4 | - |
| Emrick Lake Cmpgrnd Cabins | Lake Delton, WI | 750 | 4 | - |
| Emrick Lake Cmpgrnd Handpump | Lake Delton, WI | 750 | 0 | - |
| Emrick Lake Cmpgrnd Office | Lake Delton, WI | 750 | 0 | - |
| Emrick Lake Cmpgrnd East Sites | Lake Delton, WI | 750 | 0 | - |
| Wabeno Sanitary Dist 1 | Wabeno, WI | 750 | 30 | - |
| Glidden Sanitary District | Glidden, WI | 750 | 69 | - |
| Tigerton Waterworks | Tigerton, WI | 740 | 33 | - |
| St Pauls Evangelical Lutheran Church | Howards Grove, WI | 735 | 9 | - |
| Mellen Water Utility | Mellen, WI | 731 | 19 | - |
| Iowa Grant Schools | Livingston, WI | 730 | 22 | - |
| Menards Old Mill Center | Eau Claire, WI | 730 | 107 | - |
| Coleman Waterworks | Coleman, WI | 727 | 56 | - |
| Crystal Lake RV Resort LLC | Lodi, WI | 725 | 127 | - |
| Jammers | Wisconsin Rapids, WI | 725 | 0 | - |
| United Cooperative Store & Offices | Beaver Dam, WI | 723 | 0 | - |
| Timber Lee Chris Ctr Redwood Commons | East Troy, WI | 720 | 0 | - |
| Rstore #4517 | Kewaskum, WI | 720 | 6 | - |
| Hale Park Meadows | Muskego, WI | 720 | 179 | - |
| Cascade Waterworks | Cascade, WI | 719 | 49 | - |
| Reeseville Waterworks | Reeseville, WI | 718 | 256 | - |
| Montfort Waterworks | Montfort, WI | 718 | 43 | - |
| Potosi Waterworks | Potosi, WI | 718 | 83 | - |
| All Stop Plaza | Wisconsin Dells, WI | 718 | 8 | - |
| Caseys General Store #3793 | Ankeny, WI | 715 | 0 | - |
| Sevastopol High Sch | Sturgeon Bay, WI | 715 | 21 | - |
| La Farge Waterworks | La Farge, WI | 712 | 28 | - |
| Wauzeka Waterworks | Wauzeka, WI | 711 | 44 | - |
| St Johns Lutheran School | Newburg, WI | 710 | 767 | - |
| Station Hwy 33 | Hartford, WI | 708 | 0 | - |
| Station 67 | Ashippun, WI | 707 | 0 | - |
| St Nazianz Waterworks | St Nazianz, WI | 705 | 30 | - |
| Almena Waterworks | Almena, WI | 705 | 133 | - |
| Olin-Sang-Ruby Union Institute - Main System | Oconomowoc, WI | 704 | 47 | - |
| Christ Lutheran School and Church | Big Bend, WI | 704 | 202 | - |
| Saddle Ridge Estates | Portage, WI | 700 | 31 | - |
| Olin-Sang-Ruby Union Institute - Bath House | Oconomowoc, WI | 700 | 0 | - |