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 |
| Big Bay Island Park Showers | Lapointe, WI | 25 | 0 | - |
| Solstice Outdoors Inc Dba - the Sandbar | Ashland, WI | 25 | 0 | - |
| Old Apostolic Lutheran Church | Ashland, WI | 25 | 0 | - |
| Fairway Suites | La Pointe, WI | 25 | 0 | - |
| Rock House The | Lapointe, WI | 25 | 4 | - |
| Hudson Square | Ashland, WI | 25 | 0 | - |
| Darlings Grocery | La Pointe, WI | 25 | 0 | - |
| Wildwood Haven Resort Campground 2 | Mellen, WI | 25 | 0 | - |
| Highbridge Oasis | Highbridge, WI | 25 | 47 | - |
| Mellen Country Club | Mellen, WI | 25 | 35 | - |
| Local Bar and Grille The | Ashland, WI | 25 | 0 | - |
| Maslowski Beach Wishing Well | Ashland, WI | 25 | 0 | - |
| Maslowski Beach East | Ashland, WI | 25 | 3 | - |
| Prentice Park Pavilion East | Ashland, WI | 25 | 0 | - |
| Prentice Park Pavilion West | Ashland, WI | 25 | 1 | - |
| St Annes Catholic Church | Ashland, WI | 25 | 40 | - |
| Northwoods Bar and Grill | Ashland, WI | 25 | 5 | - |
| Airport Inn | Ashland, WI | 25 | 7 | - |
| Elkhorn Lodge | Clam Lake, WI | 25 | 6 | - |
| Maple Grove Tavern | Butternut, WI | 25 | 31 | - |
| Midway Bar | Butternut, WI | 25 | 0 | - |
| Drop Tine Bar and Grill | Mellen, WI | 25 | 6 | - |
| Ashland Town Hall | Highbridge, WI | 25 | 56 | - |
| Northern Lure Resort | Glidden, WI | 25 | 4 | - |
| Inn on Madeline Island Rendezvous Bldg & Pub and Wine Bar | La Pointe, WI | 25 | 12 | - |
| Harry E Nelson Community Center | Lapointe, WI | 25 | 43 | - |
| Ashland Municipal Airport Jfk Memorial Airport | Ashland, WI | 25 | 12 | - |
| Barrel Inn | Ashland, WI | 25 | 133 | - |
| St Johns United Church of Christ | La Pointe, WI | 25 | 0 | - |
| Prentice Park RV Cmgd | Ashland, WI | 25 | 0 | - |
| WI DNR Big Bay Campground East | La Pointe, WI | 25 | 26 | - |
| WI DNR Big Bay Park Visitors Entrance Office | La Pointe, WI | 25 | 5 | - |
| WI DNR Big Bay Shower Facility | La Pointe, WI | 25 | 11 | - |
| Maslowski Beach Bathrooms | Ashland, WI | 25 | 8 | - |
| Alan Tomczak Park | Ashland, WI | 25 | 0 | - |
| Madeline Island Historical Museum | La Pointe, WI | 25 | 12 | - |
| Farm House Madeline Island | La Pointe, WI | 25 | 2 | - |
| Big Bay Island Park Campground Center | Lapointe, WI | 25 | 7 | - |
| Four Corners Saloon | Mason, WI | 25 | 29 | - |
| Wild Rice Restaurant and Retreat | Bayfield, WI | 25 | 0 | - |
| Siskiwit River Cabins | Cornucopia, WI | 25 | 0 | - |
| Crosswinds Resort Shower House | Barnes, WI | 25 | 0 | - |
| Russell Community Center | Bayfield, WI | 25 | 0 | - |
| Tri Lake Timbers Hill Campsites | Iron River, WI | 25 | 0 | - |
| Crosswoods Adventure Camp Tamarack | Ellsworth, WI | 25 | 12 | - |
| Evergreen Tavern LLC | Cable, WI | 25 | 0 | - |
| Cedar Lodge and Steak House | Barnes, WI | 25 | 23 | - |
| Bayfield Co Big Rock Campground | Washburn, WI | 25 | 18 | - |
| Namakagon Community Center | Cable, WI | 25 | 10 | - |
| Bayfield Co Atkins Lake Park | Washburn, WI | 25 | 13 | - |