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 |
|---|---|---|---|---|
| Licking Regional Water District | Baltimore, OH | 17,818 | 138 | Clean |
| New Philadelphia City PWS | New Philadelphia, OH | 17,410 | 24 | Clean |
| Erie Co Perkins District | Huron, OH | 17,241 | 35 | Clean |
| Franklin Public Water System | Franklin, OH | 17,175 | 171 | Detected |
| Norwalk City PWS | Norwalk, OH | 17,068 | 45 | Detected |
| Steubenville, City Of | Steubenville, OH | 17,000 | 194 | Clean |
| Mount Vernon City PWS | Mount Vernon, OH | 16,990 | 13 | Clean |
| Salem City | Salem, OH | 16,850 | 63 | Clean |
| Wright-Patterson Afb Area a PWS | Vandalia, OH | 16,551 | 32 | Detected |
| Defiance City | Defiance, OH | 16,494 | 386 | Detected |
| Tuppers Plains/Chester Water District | Long Bottom, OH | 16,087 | 96 | Clean |
| Ravenna City PWS | Ravenna, OH | 16,000 | 12 | Detected |
| Jackson Co. Water Company-WTP | Jackson, OH | 15,984 | 34 | Clean |
| Aurora City - Cleveland PWS | Aurora, OH | 15,852 | 16 | Clean |
| Monroe City PWS | Monroe, OH | 15,600 | 114 | Clean |
| Pike Water, Inc.-Plant PWS | Waverly, OH | 15,487 | 62 | Detected |
| Fairfield County Utilities PWS | Lancaster, OH | 15,486 | 4 | Clean |
| Streetsboro City PWS | Streetsboro, OH | 15,105 | 8 | Clean |
| Indian Hill City PWS | Cincinnati, OH | 15,000 | 29 | Detected |
| Maumee City | Maumee, OH | 14,286 | 9 | Clean |
| Bexley City PWS | Bexley, OH | 14,250 | 15 | Detected |
| Girard City | Girard, OH | 14,122 | 23 | Detected |
| Washington Court House PWS | Williamsport, OH | 14,100 | 23 | Clean |
| Jefferson Co W and S District - M | Steubenville, OH | 13,983 | 49 | Detected |
| Ashtabula County Water System | Jefferson, OH | 13,972 | 18 | Clean |
| Circleville City PWS | Circleville, OH | 13,927 | 36 | Clean |
| Scioto Co. Regional Water District #1 | Lucasville, OH | 13,820 | 56 | Detected |
| Coshocton PWS | Coshocton, OH | 13,537 | 69 | Clean |
| Englewood City PWS | Englewood, OH | 13,463 | 12 | Clean |
| Fostoria City | Fostoria, OH | 13,441 | 43 | Clean |
| Dover City PWS | Dover, OH | 13,253 | 99 | Clean |
| Bellefontaine City PWS | Bellefontaine, OH | 13,249 | 345 | Detected |
| Greenville City PWS | Greenville, OH | 13,227 | 31 | Detected |
| Warren Co. Socialville PWS | Lebanon, OH | 13,216 | 4 | Detected |
| Bedford City PWS | Bedford, OH | 13,149 | 8 | Clean |
| Trenton City PWS | Trenton, OH | 13,012 | 87 | Detected |
| West Carrollton City PWS | Camden, OH | 12,910 | 7 | Clean |
| Loveland City PWS | Loveland, OH | 12,800 | 38 | Detected |
| East Liverpool City | East Liverpool, OH | 12,586 | 316 | Detected |
| Bucyrus City | Bucyrus, OH | 12,570 | 32 | Clean |
| Conneaut | Conneaut, OH | 12,538 | 48 | Clean |
| Wilmington City PWS | Wilmington, OH | 12,401 | 137 | Detected |
| Amherst City PWS | Amherst, OH | 11,797 | 9 | Clean |
| Celina City | Celina, OH | 11,682 | 451 | Detected |
| Harrison City PWS | Harrison, OH | 11,600 | 70 | Clean |
| Urbana City PWS | Urbana, OH | 11,428 | 174 | Detected |
| Uh - Cleveland Medical Center | Cleveland, OH | 11,395 | 8 | Detected |
| Jefferson Water and Sewer District PWS | Blacklick, OH | 11,294 | 123 | Clean |
| Ironton | Ironton, OH | 11,129 | 92 | Detected |
| Northwest Regional Water District | McDermott, OH | 11,059 | 12 | Detected |