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 |
| Camp Northwoods Voyager Area | Mason, WI | 25 | 15 | - |
| Island View Campground | Cable, WI | 25 | 0 | - |
| Herbster Campground | Herbster, WI | 25 | 23 | - |
| Topside LLC | Webster, WI | 25 | 24 | - |
| Thompsons West End Park West Campground | Washburn, WI | 25 | 0 | - |
| Benoit Community Center | Mason, WI | 25 | 0 | - |
| Bethany Baptist Church | Mason, WI | 25 | 9 | - |
| Choppers | Cable, WI | 25 | 10 | - |
| El Zarco Restaurant and Bar | Mason, WI | 25 | 19 | - |
| Roos | Cable, WI | 25 | 31 | - |
| Howl Adventure Center and Adventure Club Brewery | Bayfield, WI | 25 | 4 | - |
| Pioneer Bar | Cable, WI | 25 | 0 | - |
| Otter Bay | Cable, WI | 25 | 19 | - |
| Grandview Town Hall | Grandview, WI | 25 | 4 | - |
| Bayfield Co Twin Bear Campground Boat Landing | Washburn, WI | 25 | 7 | - |
| Bayfield Co Twin Bear Campground Office | Washburn, WI | 25 | 7 | - |
| Loon Saloon | Cable, WI | 25 | 0 | - |
| Robinson Lake Resort and Bar | Barnes, WI | 25 | 0 | - |
| Crosswinds Resort and Campground | Barnes, WI | 25 | 15 | - |
| Tomahawk Lake Park | Barnes, WI | 25 | 0 | - |
| Rcs Decoy Inn | Solon Springs, WI | 25 | 9 | - |
| Barnes Trading Post | Barnes, WI | 25 | 32 | - |
| Koffee Kup The | Barnes, WI | 25 | 59 | - |
| Barnes Town Hall | Barnes, WI | 25 | 8 | - |
| Camp Northwoods Troop Houses | Mason, WI | 25 | 12 | - |
| Bayfield Co Delta Lake Campground | Washburn, WI | 25 | 7 | - |
| Living Hope Community Church | Cable, WI | 25 | 12 | - |
| Four Seasons Resort | Cable, WI | 25 | 41 | - |
| St Anns Church | Cable, WI | 25 | 0 | - |
| Enchanted Inn Resort Restaurant | Gordon, WI | 25 | 31 | - |
| Enchanted Inn Resort Campground | Gordon, WI | 25 | 39 | - |
| El Charro Mexican Bar and Grill | Minong, WI | 25 | 47 | - |
| Garmisch USA Resort | Cable, WI | 25 | 2 | - |
| Lakewoods Lodge | Cable, WI | 25 | 525 | - |
| Tri Lake Timbers Lake Cabins and Bar | Iron River, WI | 25 | 0 | - |
| Ino Bar | Ashland, WI | 25 | 20 | - |
| Port Superior Condos | Minneapolis, WI | 25 | 0 | - |
| Avalon Bar | Benoit, WI | 25 | 0 | - |
| Lake Owen Resort | Cable, WI | 25 | 14 | - |
| Cable Community Center | Cable, WI | 25 | 0 | - |
| Siskiwit Bay Park | Cornucopia, WI | 25 | 3 | - |
| Thirsty Trout | Mason, WI | 25 | 15 | - |
| Tracks Inn | Barnes, WI | 25 | 36 | - |
| U S F S Two Lakes Cmpgd 5 | Washburn, WI | 25 | 12 | - |
| Thompsons West End Park East Woods | Washburn, WI | 25 | 0 | - |
| U S N P Apostle Is Sand Island Eb Saw01 | Bayfield, WI | 25 | 5 | - |
| Hood Equipment Inc | Iron River, WI | 25 | 551 | - |
| Our Savior Free Lutheran Church | Mason, WI | 25 | 40 | - |
| Great Divide Ballpark | Grandview, WI | 25 | 27 | - |
| Hope Lutheran Church | Brule, WI | 25 | 3 | - |