Public Water Systems
4,181 active water systems in OH.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| WRIGHT-PATTERSON AFB AREA B PWS | VANDALIA, OH | 11,034 | 34 | Detected |
| WAPAKONETA CITY | WAPAKONETA, OH | 11,000 | 21 | Detected |
| VAN WERT CITY | VAN WERT, OH | 10,846 | 287 | Clean |
| VERMILION CITY | VERMILION, OH | 10,569 | 316 | Clean |
| CAMBRIDGE, CITY OF | CAMBRIDGE, OH | 10,520 | 494 | Detected |
| GALION CITY | GALION, OH | 10,453 | 59 | Detected |
| CITY OF HEATH PWS | HEATH, OH | 10,310 | 17 | Clean |
| BUCKEYE WATER DISTRICT - OHIO RIVER | WELLSVILLE, OH | 10,300 | 112 | Clean |
| LONDON CITY PWS | COLUMBUS, OH | 10,256 | 153 | Detected |
| EARNHART HILL WATER DISTRICT PWS | CIRCLEVILLE, OH | 10,057 | 33 | Detected |
| TRUMBULL CO. - SOUTHEAST PWS | VIENNA, OH | 9,931 | 14 | Detected |
| PATASKALA CITY | PATASKALA, OH | 9,900 | 47 | Detected |
| LITTLE HOCKING WATER ASSOCIATION, INC. | LITTLE HOCKING, OH | 9,892 | 8 | Detected |
| WYOMING CITY PWS | CINCINNATI, OH | 9,700 | 13 | Detected |
| JACKSON, CITY OF | JACKSON, OH | 9,691 | 181 | Detected |
| NORTHWESTERN W AND SD - OREGON WTLN 200 | BOWLING GREEN, OH | 9,629 | 61 | Detected |
| OAKWOOD CITY PWS | OAKWOOD, OH | 9,572 | 2 | Detected |
| READING CITY PWS | READING, OH | 9,506 | 54 | Detected |
| BELLBROOK WATER WORKS | BELLBROOK, OH | 9,475 | 37 | Detected |
| SHELBY CITY | SHELBY, OH | 9,453 | 189 | Detected |
| ST MARYS CITY | ST MARYS, OH | 9,356 | 11 | Detected |
| CANAL WINCHESTER CITY PWS | CANAL WINCHESTER, OH | 9,286 | 3 | Clean |
| TWIN CITY WATER AND SEWER DISTRICT PWS | DENNISON, OH | 9,224 | 185 | Clean |
| LOUISVILLE CITY PWS | LOUISVILLE, OH | 9,186 | 40 | Detected |
| SHEFFIELD LAKE CITY PWS | SHEFFIELD LAKE, OH | 9,108 | 11 | Clean |
| TROTWOOD CITY PWS | TROTWOOD, OH | 9,000 | 58 | Detected |
| CHILLICOTHE CORRECTIONAL INSTITUTION | OAK HILL, OH | 9,000 | 72 | Clean |
| WRIGHT STATE UNIVERSITY | DAYTON, OH | 8,948 | 47 | Clean |
| GUERNSEY CO. WATER DEPT. | CAMBRIDGE, OH | 8,891 | 25 | Detected |
| CLARK COUNTY NORTHRIDGE PWS | SPRINGFIELD, OH | 8,874 | 14 | Clean |
| SCIOTO WATER INC.-ROSE HILL | FRANKLIN FURNACE, OH | 8,861 | 116 | Clean |
| NAPOLEON CITY | NAPOLEON, OH | 8,858 | 106 | Detected |
| BRYAN CITY | BRYAN, OH | 8,729 | 11 | Detected |
| PORTAGE COUNTY WATER RESOURCES | RAVENNA, OH | 8,606 | 10 | Detected |
| OBERLIN WATER DEPARTMENT | LAGRANGE, OH | 8,600 | 32 | Detected |
| SANITARY DISTRICT #4 | COLUMBUS, OH | 8,575 | 40 | Detected |
| ORRVILLE CITY PWS | NAVARRE, OH | 8,452 | 40 | Detected |
| EATON PUBLIC WATER SYSTEM | W. ALEXANDRIA, OH | 8,400 | 0 | Clean |
| HUDSON CITY PWS | HUDSON, OH | 8,385 | 6 | Detected |
| KENTON CITY | KENTON, OH | 8,360 | 22 | Detected |
| HUBBARD CITY PWS | HUBBARD, OH | 8,339 | 10 | Detected |
| TRUMBULL CO. - BAZETTA/CHAMPION | VIENNA, OH | 8,270 | 9 | Detected |
| BELLEVUE CITY | BELLEVUE, OH | 8,236 | 53 | Detected |
| AQUA OHIO - LAWRENCE COUNTY | WESTERVILLE, OH | 8,130 | 12 | Detected |
| CANFIELD CITY PWS | CANFIELD, OH | 7,767 | 33 | Detected |
| KNOX COUNTY WATER AND WASTEWATER PWS | MOUNT VERNON, OH | 7,710 | 15 | Clean |
| HOLLYWOOD GAMING @ MVRC | WYOMISSING, OH | 7,625 | 2 | Clean |
| HDMA - BENTON RD PWS | MARYSVILLE, OH | 7,600 | 63 | Detected |
| WAUSEON CITY | WAUSEON, OH | 7,568 | 111 | Detected |
| WARREN COMM W AND S ASSN 2 | MARIETTA, OH | 7,215 | 29 | Detected |