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 |
| Summit Lake Game Farm and Campground | Hayward, WI | 100 | 0 | - |
| Dalens Resort South | Birchwood, WI | 100 | 0 | - |
| Paradise Waters LLC Lodging | Stone Lake, WI | 100 | 0 | - |
| Hayward Lumberjack Inn One Story Building | Trego, WI | 100 | 14 | - |
| Tally Ho | Hayward, WI | 100 | 19 | - |
| Ghost Lake Lodge | Hayward, WI | 100 | 23 | - |
| Pats Landing Lodge | Hayward, WI | 100 | 4 | - |
| Reiskes Island View Resort | Hayward, WI | 100 | 0 | - |
| Treeland Resort | Hayward, WI | 100 | 22 | - |
| Treeland Cottages | Hayward, WI | 100 | 4 | - |
| Callahan Lake Resort | Hayward, WI | 100 | 23 | - |
| Woodhaven Resort LLC | Hayward, WI | 100 | 9 | - |
| Lakeview Golf and Pizza | Hayward, WI | 100 | 3 | - |
| Ranch Supper Club | Hayward, WI | 100 | 10 | - |
| Chippewa Pines Resort Lodge | Couderay, WI | 100 | 11 | - |
| Tiger Musky Resort Main | Couderay, WI | 100 | 15 | - |
| Beechmoor Lounge and Restaurant | Stone Lake, WI | 100 | 16 | - |
| Wayside Inn | Hayward, WI | 100 | 30 | - |
| Lake Chippewa Original Campground | Hayward, WI | 100 | 7 | - |
| Lake Chippewa Campground Lodge | Hayward, WI | 100 | 18 | - |
| Roosters Tavern | Hayward, WI | 100 | 3 | - |
| Camp Forest Springs Neale Lodge & Main Camp | Westboro, WI | 100 | 2 | - |
| Prime Bar Family Dining Inc | Trego, WI | 100 | 0 | - |
| Tracks | Trego, WI | 100 | 16 | - |
| River Church The | Minong, WI | 100 | 4 | - |
| Aztalan Bio | Johnson Creek, WI | 99 | 3 | - |
| Waste Management Southeast Wisconsin | Franklin, WI | 99 | 4 | - |
| Bel Mar Offices I & II | Mequon, WI | 99 | 5 | - |
| Wiota Sanitary District | South Wayne, WI | 98 | 37 | - |
| St Johns Evangelical Lutheran | Hill Point, WI | 98 | 28 | - |
| St Johns Lutheran Church | Grafton, WI | 98 | 21 | - |
| Ozaukee Daycare Center - Ulao 2 | Mequon, WI | 98 | 3 | - |
| Garden Center | Mukwonago, WI | 98 | 4 | - |
| Country Aire Mobile Home Court LLC | Stevens Point, WI | 98 | 20 | - |
| Fish Creek Cmpgd | Fish Creek, WI | 98 | 25 | - |
| Emr LLC Dba 5 Corners Truck & Auto | Cedarburg, WI | 97 | 886 | - |
| Full Gospel Church | West Bend, WI | 97 | 1 | - |
| Smart Sand Inc - Main Office | Yardley, WI | 97 | 0 | - |
| Pirco MHP | Wisconsin Rapids, WI | 97 | 60 | - |
| Burlington Northern Santa Fe Taconite Facility | Superior, WI | 97 | 28 | - |
| Edgewater Supper Club | Jefferson, WI | 96 | 6 | - |
| Rock Prairie Montessori School | Janesville, WI | 96 | 41 | - |
| New World Montessori School | Mequon, WI | 96 | 76 | - |
| Elm Grove Preschool & Child Care | Elm Grove, WI | 96 | 5 | - |
| Countryside Estates Mhc | Sandy, WI | 96 | 48 | - |
| Busseyville Park | Edgerton, WI | 95 | 10 | - |
| Donges Bay 5401 | West Allis, WI | 95 | 26 | - |
| Crown of Life Ev Lutheran Sch & Ch | Hubertus, WI | 95 | 23 | - |
| Willow Creek Bp | Colgate, WI | 95 | 34 | - |
| Lucky Chuckys Beach Bar and Grill | Oconomowoc, WI | 95 | 11 | - |