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 |
| Jim & Lindas Lakeview Supper Club | Malone, WI | 205 | 6 | - |
| Lake View Inn | Markesan, WI | 205 | 8 | - |
| Christianos Pizza Green Lake | Green Lake, WI | 205 | 32 | - |
| Breaking Bread | Sheboygan, WI | 205 | 6 | - |
| Ncn New Addition | Black River Falls, WI | 205 | 4 | - |
| Petenwell Co Park 11 | Friendship, WI | 205 | 0 | - |
| Holiday Shores Cmpgd 6 East | Wisconsin Dells, WI | 205 | 4 | - |
| Anchor at Lakeside Bar & Grill | Verona, WI | 204 | 28 | - |
| Crystal Lake Park - Beach Area | Beaver Dam, WI | 204 | 0 | - |
| Koshkonong Mounds Country Club | Fort Atkinson, WI | 204 | 3 | - |
| Toms Straw Hat LLC | Bristol, WI | 204 | 19 | - |
| Chucks Place | Thiensville, WI | 204 | 22 | - |
| Kansasville Quick Mart | Kansasville, WI | 204 | 11 | - |
| Lautenbachs Orchard Country Winery & Market | Fish Creek, WI | 204 | 36 | - |
| Fondy Sports Complex Inc | Fond Du Lac, WI | 204 | 5 | - |
| Fondy Aqua Park | Fond Du Lac, WI | 204 | 8 | - |
| Zion Lutheran Ch | Neshkoro, WI | 204 | 19 | - |
| Interstate Easy Stop | Portage, WI | 203 | 4 | - |
| Portage One Stop | Portage, WI | 203 | 0 | - |
| Cantafio's Buckhorn Steak House | Beaver Dam, WI | 203 | 22 | - |
| Sky Vu Drive IN | Monroe, WI | 203 | 5 | - |
| Chapparal Campground Lower Well | Wonewoc, WI | 203 | 0 | - |
| Country Lanes | Franklin, WI | 203 | 37 | - |
| Community Church of Nazarene | Racine, WI | 203 | 2 | - |
| Minooka Park Picnic Area # 1 & 2 | Waukesha, WI | 203 | 4 | - |
| Minooka Park Picnic Area # 5 | Waukesha, WI | 203 | 8 | - |
| Mukwonago Park Bathroom Bldg | Waukesha, WI | 203 | 0 | - |
| Shepherd of the Bay Lutheran | Ellison Bay, WI | 203 | 33 | - |
| Cedar Lodge Restaurant | Malone, WI | 203 | 3 | - |
| Crestview Academy Addition | Eau Claire, WI | 203 | 10 | - |
| Milos | Tomahawk, WI | 203 | 27 | - |
| Bayside Supper Club | Beaver Dam, WI | 202 | 11 | - |
| Rome Riverside Campground | Mukwonago, WI | 202 | 9 | - |
| Natures Touch Campground Shower | Wisconsin Dells, WI | 202 | 0 | - |
| Blackhawk Corporate Center | Franksville, WI | 202 | 483 | - |
| St Luke Lutheran Church | Slinger, WI | 202 | 0 | - |
| WI DNR Kmsfsu Oakridge Demo Farm | Madison, WI | 202 | 58 | - |
| Redeemer United Church of Christ | Sussex, WI | 202 | 86 | - |
| Old World Wisconsin 4 Mile House W8 | Eagle, WI | 202 | 27 | - |
| Old World Wisconsin Ramsey Barn W10 | Eagle, WI | 202 | 65 | - |
| Cornerstone Church | Delafield, WI | 202 | 37 | - |
| Our Saviors Evangelical Lutheran Church | Hartland, WI | 202 | 4 | - |
| Menomonee Park New Office Bldg | Waukesha, WI | 202 | 6 | - |
| WI DNR Pen Tennison Bay | Madison, WI | 202 | 1 | - |
| WI DNR Pen 600 Site Well | Madison, WI | 202 | 27 | - |
| WI DNR Pen 700 Site Well | Madison, WI | 202 | 17 | - |
| St John Lutheran Church Hall | Kewaskum, WI | 202 | 5 | - |
| Our Risen Savior Cath Ch | Eldorado, WI | 202 | 3 | - |
| Plum Petroleum LLC | Plum City, WI | 202 | 24 | - |
| Highview Inn | Medford, WI | 202 | 6 | - |