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 |
| Lake Arbutus Tiki Bar & Campground | Merrillan, WI | 37 | 25 | - |
| Big River Resources Boyceville LLC | West Burlington, WI | 37 | 16 | - |
| Mill of Arkdale LLC The | Friendship, WI | 37 | 36 | - |
| Pearces Mobile Home Estates | Richland Center, WI | 37 | 491 | - |
| Walleye Lodge 3 Hill | Pearson, WI | 37 | 10 | - |
| Bethlehem Lutheran Church | Milan, WI | 37 | 0 | - |
| Capital Hill Mobile Home Park | Lodi, WI | 36 | 8 | - |
| Debs North Star Tavern | Poynette, WI | 36 | 13 | - |
| Burke Town Hall Town Of | Madison, WI | 36 | 0 | - |
| Pioneer Pointe Pool & Tennis Club | Verona, WI | 36 | 0 | - |
| Trinity Lutheran Church | Reeseville, WI | 36 | 12 | - |
| Caddy Shack | Oconomowoc, WI | 36 | 31 | - |
| Lebanon Fire Department | Lebanon, WI | 36 | 0 | - |
| Djs Kwik Stop | Gotham, WI | 36 | 37 | - |
| Norman Office Building A | Richland Center, WI | 36 | 4 | - |
| Whitnall View Motel | Franklin, WI | 36 | 31 | - |
| North Lake Veterinary Clinic | Hartland, WI | 36 | 0 | - |
| Little Sweden Lodge | Fish Creek, WI | 36 | 4 | - |
| Pioneer Store | Ellison Bay, WI | 36 | 0 | - |
| Door Co Coffee Lab & Trixies | Ephraim, WI | 36 | 6 | - |
| Nwtc Woodland Center | Green Bay, WI | 36 | 26 | - |
| Rusty Spur Saloon | Kewaskum, WI | 36 | 3 | - |
| Kingston Cheese Co-Op | Cambria, WI | 36 | 8 | - |
| Lakeside Mennonite School | Two Rivers, WI | 36 | 0 | - |
| Town of Wilson Fire Department | Sheboygan, WI | 36 | 11 | - |
| Howards Grove Family Dental | Howards Grove, WI | 36 | 12 | - |
| Service One Transportation | Plymouth, WI | 36 | 0 | - |
| Phat Bobs West Cmpgd | Strum, WI | 36 | 8 | - |
| Roland Machinery Company | Springfield, WI | 36 | 0 | - |
| Holiday Stationstore #471 | Bloomington, WI | 36 | 0 | - |
| Land O Lakes- Animal Milk Solutions | Union Center, WI | 36 | 10 | - |
| Spring Breeze Dairy | Appleton, WI | 36 | 21 | - |
| Changs Halfmoon Lake View Bar & Grill | Mosinee, WI | 36 | 0 | - |
| Beacons Cabins | Minocqua, WI | 36 | 0 | - |
| Monarch Fitness Center | Hayward, WI | 36 | 0 | - |
| Newport Ev Lutheran Church | Wisconsin Dells, WI | 35 | 5 | - |
| Mount Vernon Tap | Belleville, WI | 35 | 0 | - |
| K & a Greenhouse - Fitchburg | Fitchburg, WI | 35 | 0 | - |
| London Moravian Church | Cambridge, WI | 35 | 5 | - |
| Roxbury Valley Trap Club | Sauk City, WI | 35 | 16 | - |
| Pleasant Springs Town Hall | Stoughton, WI | 35 | 0 | - |
| Windsor TN Hall & Dane Co NE Precinct | Deforest, WI | 35 | 5 | - |
| Camp Brandenburg Lake Side Well 1 | Madison, WI | 35 | 0 | - |
| Olson Toon Landscaping | Verona, WI | 35 | 0 | - |
| Nonns Flooring Warehouse | Dane, WI | 35 | 0 | - |
| Nelsons Bus Service Inc | McFarland, WI | 35 | 0 | - |
| Koshkonong Trails Charter School | Cambridge, WI | 35 | 3 | - |
| K & a Greenhouse - Middleton | Middleton, WI | 35 | 0 | - |
| St Peters Evangelical Lutheran Church | Mayville, WI | 35 | 4 | - |
| WI DNR Wyalusing WI Ridge Shower Building | Bagley, WI | 35 | 47 | - |