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 |
| Hebron Community & Head Start Building | Hebron, WI | 143 | 4 | - |
| Davids Star Ev Lutheran School | Jackson, WI | 143 | 21 | - |
| Fairview School | Pulaski, WI | 143 | 16 | - |
| Mt Horeb United Methodist Church | Mount Horeb, WI | 142 | 16 | - |
| Martintown Community Church | Martintown, WI | 142 | 26 | - |
| Oakwood Park Golf Course | Wauwatosa, WI | 142 | 5 | - |
| New Testament Baptist Church | Columbus, WI | 141 | 0 | - |
| Timber Lee Chris Ctr Tamarack | East Troy, WI | 141 | 18 | - |
| Norris Inc | Mukwonago, WI | 141 | 503 | - |
| Camp Evelyn Main Well | Plymouth, WI | 141 | 24 | - |
| Camp Evelyn Gemini Bldgs Well | Plymouth, WI | 141 | 13 | - |
| Camp Evelyn Crystal House Well | Plymouth, WI | 141 | 16 | - |
| West Madison Bible Church | Verona, WI | 140 | 0 | - |
| Wisconsin Badger Camp | Platteville, WI | 140 | 0 | - |
| Shady Hill Mobile Home Park | Stevens Point, WI | 140 | 280 | - |
| Yahara Valley Elementary School | Edgerton, WI | 140 | 34 | - |
| 59Ers Driving Range | Milton, WI | 140 | 0 | - |
| WI DNR Pike Lake Cmpgrd | Madison, WI | 140 | 22 | - |
| Pioneer Centre | Muskego, WI | 140 | 64 | - |
| Phantom Lake YMCA Camp | Mukwonago, WI | 140 | 2 | - |
| St Ann Catholic Parish | New Holstein, WI | 140 | 6 | - |
| Lake Valley Camp - Dining Hall | Milwaukee, WI | 140 | 15 | - |
| Bluffview Commons | Bangor, WI | 140 | 219 | - |
| Our Saviors Lutheran Church | Beldenville, WI | 140 | 7 | - |
| YMCA Camp Icaghowan | Hudson, WI | 140 | 15 | - |
| Wilkins Bone Lake Bar & Resort | Luck, WI | 140 | 27 | - |
| Bethany Lutheran Church | Aniwa, WI | 140 | 31 | - |
| Timber Rdg Tnns & Golf Rstrnt | Minocqua, WI | 140 | 11 | - |
| WI DNR Sandy Bch Lk Cmpgd 44 | Boulder Junction, WI | 140 | 4 | - |
| Moon Beach Camp Lodge Lower | St Germain, WI | 140 | 1 | - |
| WI DNR Sandy Bch Lk Cmpgd 43 | Boulder Junction, WI | 140 | 11 | - |
| WI DNR Sandy Bch Lk Pic 42 | Boulder Junction, WI | 140 | 0 | - |
| Kohls Floor Covering | Cedarburg, WI | 138 | 7 | - |
| Camp Anokijig Over Look Lodge | Plymouth, WI | 138 | 0 | - |
| Thorp Mennonite Church & School | Thorp, WI | 138 | 347 | - |
| Swartzendrubers Supper Club | Antigo, WI | 138 | 69 | - |
| Immanuel Evangelical Lutheran | Marshall, WI | 137 | 0 | - |
| Taliesin - Main Building | Spring Green, WI | 137 | 123 | - |
| Circle B Recreation Center & Bar | Cedarburg, WI | 137 | 0 | - |
| Dollar General Lake Geneva | Springfield, WI | 137 | 0 | - |
| Baldwin Christian School | Baldwin, WI | 137 | 75 | - |
| Drought School | Franksville, WI | 136 | 31 | - |
| Traver School | Lake Geneva, WI | 136 | 14 | - |
| Richco Structures Bldg 2 | Haven, WI | 136 | 0 | - |
| Richco Structures Bldg 5 | Haven, WI | 136 | 0 | - |
| Trinity Family Center | Hudson, WI | 136 | 80 | - |
| Rimrock Road Neighborhood | Fitchburg, WI | 135 | 16 | - |
| Sunnyside Estates | Baraboo, WI | 135 | 8 | - |
| Three Mile House | Hazel Green, WI | 135 | 21 | - |
| Klondike Cheese Co | Monroe, WI | 135 | 8 | - |