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 |
| Hope Lutheran Church | Edgar, WI | 26 | 0 | - |
| Mt Bay Trail - Ringle | Wausau, WI | 26 | 0 | - |
| Mt Bay Trail - Norrie | Wausau, WI | 26 | 6 | - |
| Triangle Motel | Three Lakes, WI | 26 | 0 | - |
| Tasmania | Minocqua, WI | 26 | 6 | - |
| Scouting America Camp Tesomas Hanna Venture Base | Weston, WI | 26 | 0 | - |
| Kwik Trip #202 | La Crosse, WI | 26 | 8 | - |
| Faths Big Woods Resort Hummingbird | Saint Germain, WI | 26 | 0 | - |
| Camp Manito-Wish YMCA Barn | Boulder Junction, WI | 26 | 7 | - |
| YMCA Camp Nawakwa Bridge Builder | Lac Du Flambeau, WI | 26 | 0 | - |
| Lake Dexter Drive IN | Wisconsin Rapids, WI | 26 | 15 | - |
| St Pauls Lutheran Church | Vesper, WI | 26 | 1 | - |
| Skeeter & Otiss | Hewitt, WI | 26 | 2 | - |
| Ransoms | Clam Lake, WI | 26 | 7 | - |
| Misty Pines Inn | Hertel, WI | 26 | 8 | - |
| Lawn Beach | Lake Nebagamon, WI | 26 | 0 | - |
| M and MS Y Go By | Gordon, WI | 26 | 6 | - |
| North of the Border Resort | Springstead, WI | 26 | 33 | - |
| Palmquists the Farm | Brantwood, WI | 26 | 14 | - |
| Bay Vue Resort | Sarona, WI | 26 | 5 | - |
| WI DNR Mackenzie 9 Picnic Area | Poynette, WI | 25 | 15 | - |
| Jamieson Park | Poynette, WI | 25 | 5 | - |
| WI DNR Mackenzie 7 Maple Syrup Finish House | Poynette, WI | 25 | 15 | - |
| Sky High Camping Pavilion | Portage, WI | 25 | 4 | - |
| Babcock Co Park Boat Launch | Madison, WI | 25 | 0 | - |
| Dane Co Brigham Park | Madison, WI | 25 | 1 | - |
| Dane Co Festge Park | Madison, WI | 25 | 0 | - |
| Dane Co Cam Rock Park Shelter 3 | Madison, WI | 25 | 10 | - |
| Dane Co Cam Rock Park Shelter 1 | Madison, WI | 25 | 21 | - |
| Dane Co Cam Rock Park Shelter 2 | Madison, WI | 25 | 15 | - |
| Dane Co Token Creek Group Camp | Madison, WI | 25 | 10 | - |
| Dane Co Token Creek Shelter 2 | Madison, WI | 25 | 0 | - |
| Goodland Co Park | Madison, WI | 25 | 0 | - |
| Dane Co Old Halfway Prairie Park | Madison, WI | 25 | 8 | - |
| American Legion/Taylors Liquor Store | Waunakee, WI | 25 | 0 | - |
| Missouri Tavern | Waunakee, WI | 25 | 0 | - |
| Dane Co Token Creek Shelter 5 | Madison, WI | 25 | 0 | - |
| Dane Co Token Creek Shelter 3 | Madison, WI | 25 | 0 | - |
| Dane Co Indian Lake Park | Madison, WI | 25 | 12 | - |
| Uw Picnic Point Hand Pump | Madison, WI | 25 | 20 | - |
| Mt Vernon Park 2 Shelter | Verona, WI | 25 | 37 | - |
| Dane Co Token Creek Shelter 4 | Madison, WI | 25 | 5 | - |
| Fish Camp Park | Madison, WI | 25 | 10 | - |
| WI DNR Kegonsa Boat Landing | Stoughton, WI | 25 | 27 | - |
| Dane Co Stewart Park Picnic Area | Madison, WI | 25 | 10 | - |
| Pope Farm Park | Verona, WI | 25 | 5 | - |
| Windsor Sports Commons - Linde Fields | Deforest, WI | 25 | 0 | - |
| Northern Light Church | Middleton, WI | 25 | 0 | - |
| Scheidegger County Forest | Madison, WI | 25 | 15 | - |
| Paoli Schoolhouse Shops & Cafe | Paoli, WI | 25 | 0 | - |