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 |
| Mohican Church of the Brethren | West Salem, OH | 170 | 46 | - |
| Hexpol Compounding - Burton PWS | Burton, OH | 169 | 123 | - |
| Hcwsd - Germano Water and Sewer | Cadiz, OH | 169 | 43 | - |
| Rose Villa Restaurant | Akron, OH | 169 | 86 | - |
| Wooster Rolling Wheels Estates MHP | Wooster, OH | 169 | 138 | - |
| The Cyril-Scott Co PWS | Lancaster, OH | 168 | 16 | - |
| Welshfield Inn | Burton, OH | 168 | 50 | - |
| Cardinal Operating Company 1/ 2 PWS | Brilliant, OH | 168 | 42 | - |
| Marlboro Church of Christ | Louisville, OH | 168 | 0 | - |
| Cortland Moose Lodge | Cortland, OH | 168 | 33 | - |
| Alive Vineyard | Newark, OH | 167 | 94 | - |
| Jerusalem Evangelical Lutheran Daycare | Wadsworth, OH | 167 | 148 | - |
| Linda Mobile Home Park PWS | Port Orange, OH | 166 | 230 | - |
| Harrison Hills Camp 3 | Carrollton, OH | 166 | 86 | - |
| Bladensburg Community Center PWS | Bladensburg, OH | 166 | 744 | - |
| Lincolnview Bible Board | Van Wert, OH | 166 | 30 | - |
| Church of Christ - Ashland | Ashland, OH | 165 | 34 | - |
| Lake Pna Sportsman Club PWS | North Georgetown, OH | 165 | 59 | - |
| Cornerstone Christian School | Holmesville, OH | 165 | 319 | - |
| Hidden Lake Campground | Swanton, OH | 165 | 49 | - |
| Dairy Bar of Green Camp | Richwood, OH | 165 | 12 | - |
| St. Henry's Stop and Go | St. Henry, OH | 165 | 18 | - |
| Cross Campground PWS | Camden, OH | 165 | 20 | - |
| Dupont Church of the Brethren | Dupont, OH | 165 | 32 | - |
| Hayes Medical Center | Fremont, OH | 165 | 56 | - |
| Liberty Bible Church PWS | Vienna, OH | 165 | 23 | - |
| Camp Christian | Marysville, OH | 165 | 37 | - |
| Franks Mobile Home Park | Akron, OH | 164 | 9 | - |
| Kids Country Day School | Hartville, OH | 163 | 466 | - |
| Sugar Isle Golf Course | New Carlisle, OH | 162 | 47 | - |
| St. Mark Lutheran Church & Preschool PWS | Chesterland, OH | 162 | 10 | - |
| VFW Post 5047 | Navarre, OH | 162 | 101 | - |
| Pleasant Valley Church and School | Niles, OH | 162 | 150 | - |
| Hartford Hill Winery PWS | Warren, OH | 161 | 0 | - |
| First Baptist Church of Ashland 1 | Ashland, OH | 160 | 70 | - |
| Parker Trutec Industries | Urbana, OH | 160 | 23 | - |
| Risen Christ Lutheran Church PWS | Springfield, OH | 160 | 116 | - |
| Spring Valley Mobile Home Park | Galion, OH | 160 | 100 | - |
| St John Lutheran Church | Greenville, OH | 160 | 29 | - |
| Sutphen Corporation | Dublin, OH | 160 | 46 | - |
| Rothenbuhler Cheesemakers, Inc. | Middlefield, OH | 160 | 24 | - |
| Marathon Mini-Mart-Newbury | Newbury, OH | 160 | 111 | - |
| The Club at Hillbrook | Russell, OH | 160 | 0 | - |
| Kingdom Hall Jehovahs PWS | Xenia, OH | 160 | 27 | - |
| Walnut Grove Methodist Church PWS | Kenton, OH | 160 | 139 | - |
| Auria Holmesville, LLC PWS | Holmesville, OH | 160 | 151 | - |
| Black Diamond Golf Course PWS | Millersburg, OH | 160 | 45 | - |
| Walnut Creek Planing PWS | Millersburg, OH | 160 | 84 | - |
| Cim Group East Liberty | Phoenix, OH | 160 | 11 | - |
| Berlin Center United Methodist Church | Ellsworth, OH | 160 | 18 | - |