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 |
| Maranatha Baptist Church | Phillips, WI | 50 | 0 | - |
| East River Run Escape | Ladysmith, WI | 50 | 0 | - |
| Js Supper Club & Catering | Ladysmith, WI | 50 | 38 | - |
| St Marys Catholic Church | Ladysmith, WI | 50 | 10 | - |
| Millers Antlers Tavern | Ladysmith, WI | 50 | 55 | - |
| Lo Bar The | Ladysmith, WI | 50 | 9 | - |
| St Francis of Assisi | Ladysmith, WI | 50 | 0 | - |
| Adventure Resort | Ladysmith, WI | 50 | 0 | - |
| Hayward KOA Water Slide | Hayward, WI | 50 | 3 | - |
| Lake Chippewa Campground North Campground | Hayward, WI | 50 | 4 | - |
| Lake Chippewa Campground New Shower Building | Hayward, WI | 50 | 4 | - |
| Farmstead Creamery and Cafe | Hayward, WI | 50 | 0 | - |
| Deer Run Resort LLC | Hayward, WI | 50 | 0 | - |
| Radisson Harvest Fest Park | Radisson, WI | 50 | 0 | - |
| Seasonal Power Toys Bait and Tackle | Birchwood, WI | 50 | 0 | - |
| Hayward Power Sports | Hayward, WI | 50 | 0 | - |
| Ray Jays Restaurant | Hayward, WI | 50 | 0 | - |
| Restore | Hayward, WI | 50 | 4 | - |
| Luedtkes Mobile Home Park | Hayward, WI | 50 | 78 | - |
| Sportsmans Lodge | Birchwood, WI | 50 | 18 | - |
| Daggetts Resort Lodge Well | Hayward, WI | 50 | 10 | - |
| Anglers Haven Resort | Hayward, WI | 50 | 16 | - |
| Spider Lake Church | Hayward, WI | 50 | 16 | - |
| Nelson Lake Lodge Laundry | Hayward, WI | 50 | 24 | - |
| Trussworks Inc | Hayward, WI | 50 | 42 | - |
| U S F S Spearhead Point Cmpgrd 2 | Park Falls, WI | 50 | 23 | - |
| Trinity Lutheran Church | Medford, WI | 50 | 18 | - |
| Shangri la West Lodge Campground | Trego, WI | 50 | 0 | - |
| Sarona United Methodist Church | Sarona, WI | 50 | 0 | - |
| Spooner Golf Course Drinking Fountain | Spooner, WI | 50 | 0 | - |
| Spooner Professional Buildings | Spooner, WI | 50 | 0 | - |
| Butternut Hills Club House | Sarona, WI | 50 | 10 | - |
| Bit O Green LLC MHP | Spring Green, WI | 49 | 231 | - |
| Quality Liquid Feeds | Dodgeville, WI | 49 | 27 | - |
| Johnson School Bus Service Inc Port Wash | Port Washington, WI | 49 | 0 | - |
| Kreilkamp Truck Shop | Allenton, WI | 49 | 0 | - |
| Unitarian Universalist Fellowship | Ephraim, WI | 49 | 42 | - |
| Tagalong Resort Stonehaven | Birchwood, WI | 49 | 0 | - |
| Tagalong Resort Tayside | Birchwood, WI | 49 | 0 | - |
| Deer Run Mobile Home Community | Boulder, WI | 49 | 30 | - |
| Edgewood Country Estates | Wausau, WI | 49 | 56 | - |
| Lakeland Village 2 | Bloomfield Hills, WI | 49 | 74 | - |
| Luther Park Bible Camp Main Well | Danbury, WI | 49 | 1 | - |
| United Pride Dairy LLC | Phillips, WI | 49 | 6 | - |
| Woodbridge Estates | Madison, WI | 48 | 35 | - |
| Monsanto Vegetables Research - Office | Deforest, WI | 48 | 0 | - |
| Monsanto Vegetables Research Corn Shop | Deforest, WI | 48 | 5 | - |
| Country Care Childrens Center | Cuba City, WI | 48 | 0 | - |
| Baileys Run Vineyard | Monroe, WI | 48 | 0 | - |
| Hyde Store | Ridgeway, WI | 48 | 20 | - |