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 |
| Shorewood Village Subdivision | Fremont, OH | 359 | 28 | - |
| Chickasaw Village | Chickasaw, OH | 358 | 34 | - |
| Rushville Village PWS | Rushville, OH | 357 | 18 | - |
| Akron Canton Jellystone Park | Uniontown, OH | 355 | 69 | - |
| Christ Chapel Church - Fort Recovery | Ft Recovery, OH | 354 | 0 | - |
| Fairlane Water Co. | Akron, OH | 354 | 76 | - |
| Mifflin Elementary School | Mansfield, OH | 352 | 37 | - |
| Scioto Water Inc.-Careys Run | Franklin Furnace, OH | 352 | 5 | - |
| Towbridge Development | Hudson, OH | 352 | 51 | - |
| Ashland Co West Holmes Career Center 2 | Ashland, OH | 350 | 61 | - |
| Ffa Camp Muskingum | Carrollton, OH | 350 | 9 | - |
| Pak-A-Sak 37 PWS | Portland, OH | 350 | 32 | - |
| Oromo Evangelical Church in Columbus PWS | Baltimore, OH | 350 | 172 | - |
| Fulton/Lucas Waterline | Wauseon, OH | 350 | 0 | - |
| St. Edwards Church | Parkman, OH | 350 | 18 | - |
| Kil-Kare Inc Track | Kettering, OH | 350 | 87 | - |
| S S Simon and Jude Catholic Church PWS | West Jefferson, OH | 350 | 8 | - |
| Cornerstone Alliance Church | Marion, OH | 350 | 4 | - |
| Maple del Manor LLC | Ravenna, OH | 350 | 80 | - |
| Circle K 5371-Atwater | Akron, OH | 350 | 37 | - |
| Ontario Christian Fellowship | Mansfield, OH | 350 | 0 | - |
| Rivertree Lake PWS | Massillon, OH | 350 | 0 | - |
| Mennonite Christian Assembly | Fredericksburg, OH | 350 | 0 | - |
| Weaver Leather LLC | Mount Hope, OH | 349 | 6 | - |
| Harvest Square Mobile Home Park | Dallas, OH | 345 | 44 | - |
| Aqua Ohio - Norlick | Mentor, OH | 345 | 218 | - |
| Kamp-A-Lott | Bellefontaine, OH | 341 | 71 | - |
| Mwcd-Piedmont Marina and Campground PWS | New Philadelphia, OH | 340 | 17 | - |
| Vanlue Village | Vanlue, OH | 340 | 38 | - |
| Little Creek Barn PWS | Forest, OH | 340 | 0 | - |
| Jefferson Co W&S District- O | Steubenville, OH | 340 | 12 | - |
| Maplewood High School | Cortland, OH | 340 | 299 | - |
| Bainbrook Water Company PWS | Middleburg Heights, OH | 339 | 25 | - |
| Laurel Springs Water Co. | Middleburg Heights, OH | 339 | 181 | - |
| Portage County Wr - Rivermoor | Ravenna, OH | 339 | 3 | - |
| Rock of Grace Church | Kinsman, OH | 338 | 91 | - |
| Aqua Ohio - Firestone Trace | Massillon, OH | 336 | 63 | - |
| Impact Worship Center Mansfield | Mansfield, OH | 335 | 0 | - |
| Odot Rest Area 7-33 Eb | Sidney, OH | 333 | 0 | - |
| Odot Rest Area 7-34 Wb | Sidney, OH | 333 | 4 | - |
| Stoneybrooke Village MHP | San Diego, OH | 332 | 41 | - |
| Odnr-Hocking Hills-Cedar Falls | Columbus, OH | 331 | 14 | - |
| Buckeye Trails - M | Orem, OH | 330 | 107 | - |
| Kidron Town and Country Store | Kidron, OH | 330 | 117 | - |
| Arrowhead Lake MHP | West Covina, OH | 327 | 74 | - |
| Damascus Elementary PWS | Beloit, OH | 326 | 68 | - |
| Shiloh Christian Union Church | Delta, OH | 325 | 26 | - |
| Great Lakes Cheese-Headquarters | Hiram, OH | 325 | 0 | - |
| Wilmot Village PWS | Wilmot, OH | 325 | 134 | - |
| Dollar General Store - Pemberville 13981 | Goodlettsville, OH | 325 | 31 | - |