Public Water Systems
4,181 active public water systems in OH, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
| Pulaski Head Start | Defiance, OH | 150 | 204 | - |
| Camp Diclair | Bowling Green, OH | 150 | 11 | - |
| Lockport Mennonite Church | Stryker, OH | 150 | 37 | - |
| Manufactured Housing Enterprise | Bryan, OH | 150 | 258 | - |
| Kalmbach Feeds - Main Office | Upper Sandusky, OH | 150 | 26 | - |
| Peyton Community Well | Mansfield, OH | 149 | 176 | - |
| Carvel Manor MHP | Durham, OH | 148 | 138 | - |
| Caston and Main PWS | Akoron, OH | 147 | 106 | - |
| Tresha Corporation PWS | Delaware, OH | 146 | 10 | - |
| Southern Perry Co-Millertown | Corning, OH | 146 | 7 | - |
| Brookwood MHP PWS | Springfield, OH | 145 | 80 | - |
| Rogers Assembly of God | Rogers, OH | 145 | 54 | - |
| Winona Methodist Church PWS | Winona, OH | 145 | 0 | - |
| Bethlehem Lutheran Church | Defiance, OH | 145 | 121 | - |
| Chester Town Center PWS | Chesterland, OH | 145 | 9 | - |
| Huffman Metropark Momba Well PWS | Dayton, OH | 145 | 27 | - |
| Truckomat Fuel Center | Hebron, OH | 145 | 73 | - |
| First Baptist Church of New Carlisle-Day | New Carlisle, OH | 145 | 15 | - |
| West Charleston Church of the Brethren | Tipp City, OH | 145 | 10 | - |
| Buckhorn Tavern | Dayton, OH | 145 | 40 | - |
| Warren Co. Sharts Road PWS | Lebanon, OH | 145 | 17 | - |
| Hickory Hills Golf Club | Grove City, OH | 144 | 3 | - |
| Black Iron Grille PWS | Kent, OH | 144 | 93 | - |
| The Whetstone Center | Louisville, OH | 143 | 0 | - |
| St. Luke Lutheran Community - Portage La | Akron, OH | 143 | 180 | - |
| Saint Charles Center | Celina, OH | 142 | 91 | - |
| Aqua Ohio - Mansfield System #04 | Massillon, OH | 142 | 37 | - |
| Edison Park Plaza | Hartville, OH | 142 | 101 | - |
| Jeffreys Antique Gallery | Springfield, OH | 141 | 46 | - |
| Baci Winery Tasting Room | Madison, OH | 141 | 12 | - |
| Quarry Lakes MHP LLC | Miamisburg, OH | 141 | 105 | - |
| Woodland Golf Club | Cable, OH | 140 | 61 | - |
| Rhonemus Winery | Lancaster, OH | 140 | 0 | - |
| Horizons Christian Assembly | Middlefield, OH | 140 | 78 | - |
| Thompson Methodist Church | Thompson, OH | 140 | 105 | - |
| Peace Evangelical Luth Ch- Deshler | Deshler, OH | 140 | 72 | - |
| Camp Wyandot-Pool PWS | Columbus, OH | 140 | 23 | - |
| Apostolate Holy Family Park | Bloomingdale, OH | 140 | 3 | - |
| Lighthouse Memorial Church PWS | Millersport, OH | 140 | 6 | - |
| Middleburg United Methodist Church | West Liberty, OH | 140 | 56 | - |
| Transportation Research Center PWS | East Liberty, OH | 140 | 119 | - |
| Frostys RV Park and Campground PWS | Lima, OH | 140 | 12 | - |
| Salem Hills Golf and Cc | Salem, OH | 140 | 3 | - |
| Meadowood Water Association | Mansfield, OH | 140 | 342 | - |
| Calvary Baptist Church PWS | Massillon, OH | 140 | 30 | - |
| Barrs Mill Church of God | Sugarcreek, OH | 140 | 21 | - |
| Prairie Lane Lake Park-Front PWS | Wooster, OH | 140 | 10 | - |
| Clifton Gorge Exploration Center | Yellow Springs, OH | 138 | 0 | - |
| Flip Flop Cove Campground | Belle Center, OH | 138 | 16 | - |
| Avon Mobile Home Park | Akron, OH | 138 | 67 | - |