Public Water Systems
4,181 active water systems in OH.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| CLEVELAND PUBLIC WATER SYSTEM | CLEVELAND, OH | 1,308,955 | 195 | Clean |
| COLUMBUS PUBLIC WATER SYSTEM | COLUMBUS, OH | 1,305,946 | 33 | Detected |
| CINCINNATI PUBLIC WATER SYSTEM | CINCINNATI, OH | 750,200 | 0 | Detected |
| TOLEDO CITY OF | TOLEDO, OH | 360,000 | 26 | Detected |
| AKRON CITY PWS | KENT, OH | 280,000 | 214 | Detected |
| MONTGOMERY COUNTY WATER SERVICES 1 PWS | KETTERING, OH | 150,207 | 33 | Detected |
| DEL-CO WATER COMPANY, INC. | DELAWARE, OH | 150,000 | 108 | Detected |
| DAYTON PUBLIC WATER SYSTEM | DAYTON, OH | 141,407 | 46 | Detected |
| CLERMONT PUBLIC WATER SYSTEM | BATAVIA, OH | 133,059 | 62 | Detected |
| YOUNGSTOWN CITY PWS | YOUNGSTOWN, OH | 130,530 | 12 | Detected |
| BUTLER CO. WATER DISTRICT 2 PWS | HAMILTON, OH | 116,572 | 27 | Detected |
| CANTON PUBLIC WATER SYSTEM | CANTON, OH | 107,113 | 34 | Detected |
| AQUA OHIO - MASSILLON PWS | MASSILLON, OH | 95,636 | 9 | Detected |
| MONTGOMERY COUNTY WATER SERVICES 2 PWS | KETTERING, OH | 83,033 | 32 | Detected |
| LAKE COUNTY WEST WATER SUBDISTRICT | PAINESVILLE, OH | 78,379 | 6 | Clean |
| WARREN COUNTY | LEBANON, OH | 78,299 | 153 | Clean |
| AQUA OHIO - MENTOR | MENTOR, OH | 74,500 | 10 | Clean |
| RURAL LORAIN CO. WATER A | LAGRANGE, OH | 73,125 | 21 | Detected |
| ELYRIA WATER DEPARTMENT | LORAIN, OH | 68,000 | 74 | Clean |
| LIMA CITY | LIMA, OH | 65,619 | 59 | Detected |
| LORAIN CITY PWS | LORAIN, OH | 64,152 | 83 | Clean |
| HAMILTON PUBLIC WATER SYSTEM | FAIRFIELD, OH | 62,447 | 63 | Detected |
| SPRINGFIELD CITY PWS | SPRINGFIELD, OH | 60,680 | 12 | Clean |
| AQUA OHIO - STRUTHERS | STRUTHERS, OH | 58,551 | 123 | Detected |
| FINDLAY CITY | FINDLAY, OH | 54,040 | 45 | Clean |
| MIDDLETOWN CITY PWS | TRENTON, OH | 51,229 | 61 | Detected |
| CUYAHOGA FALLS CITY PWS | CUYAHOGA FALLS, OH | 51,114 | 94 | Detected |
| MANSFIELD CITY | MANSFIELD, OH | 51,000 | 84 | Clean |
| LAKEWOOD CITY PWS | LAKEWOOD, OH | 50,942 | 41 | Clean |
| NEWARK CITY PWS | NEWARK, OH | 49,934 | 70 | Detected |
| WARREN CITY PWS | WARREN, OH | 49,130 | 197 | Detected |
| MEDINA CO/NORTHWEST PWS | MEDINA, OH | 46,324 | 27 | Detected |
| AQUA OHIO - MARION | MARION, OH | 46,317 | 20 | Detected |
| FAIRFIELD CITY PWS | FAIRFIELD, OH | 44,907 | 14 | Detected |
| DELAWARE CITY PWS | DELAWARE, OH | 43,895 | 18 | Detected |
| HUBER HEIGHTS PUBLIC WATER SYSTEM | HUBER HEIGHTS, OH | 43,439 | 39 | Clean |
| SOUTHWEST REGIONAL WATER DISTRICT | HAMILTON, OH | 42,856 | 0 | Detected |
| GREENE CO.-NORTHWEST REG WATER | BEAVERCREEK, OH | 41,000 | 61 | Clean |
| LAKE COUNTY EAST WATER SUBDISTRICT | PAINESVILLE, OH | 40,656 | 17 | Clean |
| PORTSMOUTH CITY | PORTSMOUTH, OH | 40,475 | 8 | Detected |
| LANCASTER CITY PWS | LANCASTER, OH | 40,400 | 9 | Detected |
| WESTERN WATER COMPANY | MORROW, OH | 39,508 | 67 | Detected |
| WESTERVILLE CITY PWS | PATASKALA, OH | 39,000 | 32 | Detected |
| REYNOLDSBURG CITY PWS | REYNOLDSBURG, OH | 37,847 | 5 | Detected |
| STOW PUBLIC WATER SYSTEM | STOW, OH | 35,437 | 18 | Clean |
| ROSS COUNTY WATER CO INC | CHILLICOTHE, OH | 35,345 | 28 | Detected |
| HECLA WATER ASSOCIATION | IRONTON, OH | 34,942 | 19 | Detected |
| FAIRBORN PUBLIC WATER SYSTEM | JAMESTOWN, OH | 34,620 | 27 | Clean |
| GAHANNA CITY PWS | GLENFORD, OH | 33,258 | 37 | Clean |
| ATHENS PWS | ATHENS, OH | 32,725 | 29 | Detected |
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