Public Water Systems
4,181 active water systems in OH.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| AQUA OHIO - ASHTABULA | ASHTABULA, OH | 32,408 | 24 | Clean |
| BROWN COUNTY RURAL WATER | RIPLEY, OH | 32,090 | 309 | Clean |
| KINGS ISLAND PWS | KINGS ISLAND, OH | 31,753 | 104 | Detected |
| PAINESVILLE CITY PWS | MENTOR, OH | 31,728 | 5 | Clean |
| BOWLING GREEN CITY | BOWLING GREEN, OH | 31,578 | 50 | Detected |
| BARBERTON CITY | NORTON, OH | 31,298 | 209 | Clean |
| KENT CITY PWS | KENT, OH | 29,662 | 28 | Clean |
| NORTH RIDGEVILLE CITY PWS | NORTH RIDGEVILLE, OH | 29,465 | 11 | Clean |
| ZANESVILLE PWS | ZANESVILLE, OH | 29,381 | 38 | Detected |
| XENIA CITY PWS | XENIA, OH | 29,000 | 45 | Clean |
| HIGHLAND COUNTY WATER COMPANY, INC. | HILLSBORO, OH | 28,421 | 29 | Clean |
| PERRYSBURG CITY | WHITEHOUSE, OH | 27,000 | 18 | Clean |
| BELMONT CO. SANITARY DISTRICT 3 PWS | BARNESVILLE, OH | 26,822 | 51 | Clean |
| WOOSTER CITY PWS | WOOSTER, OH | 26,618 | 28 | Detected |
| TROY CITY PWS | ROSSBURG, OH | 26,305 | 5 | Clean |
| MEDINA CITY PWS | MEDINA, OH | 25,956 | 62 | Detected |
| SANDUSKY CITY | SANDUSKY, OH | 25,793 | 44 | Clean |
| MARYSVILLE CITY PWS | MARYSVILLE, OH | 25,571 | 110 | Detected |
| NAWA | TIPP CITY, OH | 24,766 | 11 | Clean |
| NORTH CANTON CITY PWS | N CANTON, OH | 24,747 | 47 | Detected |
| WADSWORTH CITY PWS | WADSWORTH, OH | 24,356 | 8 | Clean |
| TATE-MONROE WATER ASSOCIATION PWS | NEW RICHMOND, OH | 24,092 | 71 | Detected |
| OXFORD CITY PWS | SOMERVILLE, OH | 24,000 | 21 | Detected |
| AVON CITY PWS | AVON, OH | 23,800 | 14 | Clean |
| AVON LAKE CITY PWS | AVON LAKE, OH | 23,659 | 21 | Clean |
| ALLIANCE CITY PWS | ALLIANCE, OH | 22,232 | 115 | Detected |
| NILES CITY PWS | NILES, OH | 21,961 | 11 | Detected |
| ADAMS COUNTY REGIONAL WD PWS | WEST UNION, OH | 21,810 | 21 | Clean |
| CHILLICOTHE CITY PWS | CHILLICOTHE, OH | 21,725 | 24 | Detected |
| SYLVANIA CITY | SYLVANIA, OH | 21,618 | 11 | Clean |
| MUSKINGUM COUNTY WATER - SE | ZANESVILLE, OH | 21,540 | 35 | Detected |
| GALLIA CO RURAL WATER ASSOCIATION | GALLIPOLIS, OH | 20,995 | 22 | Detected |
| LEBANON CITY | LEBANON, OH | 20,700 | 51 | Detected |
| ASHLAND CITY | ASHLAND, OH | 20,648 | 26 | Detected |
| SIDNEY CITY PWS | SIDNEY, OH | 20,614 | 141 | Clean |
| OTTAWA COUNTY REGIONAL WATER DISTRICT | PORT CLINTON, OH | 20,428 | 10 | Detected |
| PIQUA CITY PWS | PIQUA, OH | 20,354 | 41 | Detected |
| AQUA OHIO - TIFFIN | MARION, OH | 20,035 | 42 | Detected |
| OREGON CITY | OREGON, OH | 19,950 | 18 | Detected |
| NORWOOD CITY PWS | NORWOOD, OH | 19,870 | 26 | Clean |
| MIAMISBURG CITY PWS | MIAMISBURG, OH | 19,790 | 8 | Clean |
| NORTHWESTERN W AND SD - TOLEDO SVC | BOWLING GREEN, OH | 19,758 | 31 | Clean |
| LE-AX REGIONAL WATER DISTRICT PWS | ATHENS, OH | 19,311 | 74 | Clean |
| SPRINGBORO PWS | SPRINGBORO, OH | 19,263 | 41 | Detected |
| PICKERINGTON CITY PWS | PICKERINGTON, OH | 19,141 | 9 | Clean |
| BEREA CITY PWS | BEREA, OH | 18,789 | 34 | Detected |
| MARIETTA CITY PWS | MARIETTA, OH | 18,707 | 119 | Detected |
| FREMONT CITY | FREMONT, OH | 18,319 | 228 | Detected |
| NORTHERN OHIO RURAL WATER | NORWALK, OH | 18,224 | 1 | Clean |
| TALLMADGE CITY PWS | TALLMADGE, OH | 18,000 | 19 | Clean |