What is PFAS?
Water suppliers
PFAS value per supplier, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Suppliers that detected PFOA or PFOS
are highlighted and listed first. “Not detected” means the contaminant was measured but
not found.
| Supplier | City | Population | PFAS (ug/L) |
|---|---|---|---|
| Mcdonald Village Pws | Mcdonald | 4,236 | 0.0212 µg/L |
| Girard City | Girard | 14,122 | 0.0201 µg/L |
| Warren Comm W and S Assn 2 | Marietta | 7,215 | 0.0200 µg/L |
| Youngstown City Pws | Youngstown | 130,530 | 0.0193 µg/L |
| Putnam Community Water Association Pws | Marietta | 2,744 | 0.0169 µg/L |
| Loveland City Pws | — | 12,800 | 0.0160 µg/L |
| Lordstown Village Pws | Lordstown | 3,515 | 0.0160 µg/L |
| Western Water Company | Morrow | 39,508 | 0.0141 µg/L |
| Trumbull Co. - Howland Twp Pws | Vienna | 6,396 | 0.0130 µg/L |
| Caldwell Village Pws | Caldwell | 3,300 | 0.0130 µg/L |
| Indian Hill City Pws | Cincinnati | 15,000 | 0.0124 µg/L |
| Canfield City Pws | Canfield | 7,706 | 0.0124 µg/L |
| Dayton Va Bldg 410 | Dayton | 125 | 0.0105 µg/L |
| Clermont Public Water System | Batavia | 133,059 | 0.0101 µg/L |
| Dayton Public Water System | Dayton | 141,407 | 0.0100 µg/L |
| Guernsey Co. Water Dept. | Cambridge | 8,891 | 0.0098 µg/L |
| Montgomery County Water Services 1 Pws | Kettering | 150,207 | 0.0096 µg/L |
| Yellow Springs Village Pws | Yellow Springs | 3,761 | 0.0092 µg/L |
| Trumbull Co. - Southeast Pws | Vienna | 9,931 | 0.0091 µg/L |
| Niles City Pws | Niles | 21,961 | 0.0090 µg/L |
| Barnesville | Barnesville | 6,500 | 0.0081 µg/L |
| Jackson/Milton Metro Water District Pws | Youngstown | 3,728 | 0.0079 µg/L |
| Bethel Village Pws | Bethel | 2,620 | 0.0079 µg/L |
| Milford City Pws | — | 6,700 | 0.0078 µg/L |
| Montgomery County Water Services 2 Pws | Kettering | 83,033 | 0.0076 µg/L |
| Leading Creek Conservancy District | Rutland | 6,663 | 0.0076 µg/L |
| Gallia Co Rural Water Association | Gallipolis | 20,995 | 0.0075 µg/L |
| Tate-Monroe Water Association Pws | New Richmond | 24,092 | 0.0074 µg/L |
| Akron City Pws | — | 280,000 | 0.0073 µg/L |
| Wilmington City Pws | Wilmington | 12,401 | 0.0073 µg/L |
| Sanitary District #4 | Columbus | 8,575 | 0.0072 µg/L |
| Gallipolis Pws | Gallipolis | 7,134 | 0.0072 µg/L |
| Springboro Pws | Springboro | 19,263 | 0.0069 µg/L |
| Hecla Water Association | Ironton | 34,942 | 0.0068 µg/L |
| Newton Falls City | Newton Falls | 6,109 | 0.0067 µg/L |
| St. Clairsville, City of Pws | St. Clairsville | 5,097 | 0.0064 µg/L |
| Greenville City Pws | Greenville | 13,227 | 0.0063 µg/L |
| Cincinnati Public Water System | Cincinnati | 750,200 | 0.0061 µg/L |
| Martins Ferry Public Water System | Martins Ferry | 6,980 | 0.0061 µg/L |
| Shadyside Public Water System | Barnesville | 3,689 | 0.0060 µg/L |
| Marietta City Pws | Marietta | 18,707 | 0.0056 µg/L |
| Bexley City Pws | — | 14,250 | 0.0056 µg/L |
| Cambridge, City of | Cambridge | 10,520 | 0.0056 µg/L |
| Ironton | Ironton | 11,129 | 0.0055 µg/L |
| Portsmouth City | Portsmouth | 40,475 | 0.0054 µg/L |
| Columbus Public Water System | Columbus | 1,305,946 | 0.0053 µg/L |
| Hamilton Public Water System | — | 62,447 | 0.0053 µg/L |
| Wooster City Pws | Wooster | 26,618 | 0.0048 µg/L |
| Union City Pws | — | 7,000 | 0.0048 µg/L |
| Georgetown Village Pws | Georgetown | 4,331 | 0.0047 µg/L |
| Middletown City Pws | Trenton | 51,229 | 0.0043 µg/L |
| Del-Co Water Company, Inc. | Delaware | 150,000 | 0.0042 µg/L |
| Bellbrook Water Works | Bellbrook | 9,475 | 0.0042 µg/L |
| Aqua Ohio - Lawrence County | — | 8,130 | 0.0042 µg/L |
| Franklin Public Water System | Franklin | 11,690 | 0.0041 µg/L |
| Maysville Regional Water | White Cottage | 6,540 | 0.0040 µg/L |
| Cleveland Public Water System | — | 1,308,955 | Not detected |
| Toledo City of | Toledo | 360,000 | Not detected |
| Butler Co. Water District 2 Pws | Hamilton | 116,572 | Not detected |
| Canton Public Water System | Canton | 107,113 | Not detected |
| Aqua Ohio - Massillon Pws | Massillon | 95,636 | Not detected |
| Lake County West Water Subdistrict | Painesville | 78,379 | Not detected |
| Aqua Ohio - Mentor | Mentor | 74,500 | Not detected |
| Rural Lorain Co. Water a | Lagrange | 73,125 | Not detected |
| Elyria Water Department | Lorain | 68,000 | Not detected |
| Lima City | Lima | 65,619 | Not detected |
| Lorain City Pws | Lorain | 64,152 | Not detected |
| Springfield City Pws | Springfield | 60,680 | Not detected |
| Findlay City Pws | Findlay | 54,040 | Not detected |
| Cuyahoga Falls City Pws | Cuyahoga Falls | 51,114 | Not detected |
| Mansfield City | Mansfield | 51,000 | Not detected |
| Lakewood City Pws | — | 50,942 | Not detected |
| Newark City Pws | Newark | 49,934 | Not detected |
| Warren City Pws | Warren | 49,130 | Not detected |
| Aqua Ohio - Marion | Marion | 47,102 | Not detected |
| Fairfield City Pws | Hamilton | 44,907 | Not detected |
| Delaware City Pws | Delaware | 43,895 | Not detected |
| Huber Heights Public Water System | Huber Heights | 43,439 | Not detected |
| Southwest Regional Water District | Hamilton | 42,856 | Not detected |
| Lake County East Water Subdistrict | Painesville | 40,656 | Not detected |
| Lancaster City Pws | Lancaster | 40,400 | Not detected |
| Westerville City Pws | — | 39,000 | Not detected |
| Reynoldsburg City Pws | — | 37,847 | Not detected |
| Stow Public Water System | Stow | 35,437 | Not detected |
| Ross County Water Co Inc | Chillicothe | 35,345 | Not detected |
| Fairborn Public Water System | — | 34,620 | Not detected |
| Gahanna City Pws | — | 33,258 | Not detected |
| Athens Pws | Athens | 32,725 | Not detected |
| Aqua Ohio - Ashtabula | Ashtabula | 32,342 | Not detected |
| Brown County Rural Water | Ripley | 32,090 | Not detected |
| Painesville City Pws | Mentor | 31,728 | Not detected |
| Bowling Green City | Bowling Green | 31,578 | Not detected |
| Barberton City | Norton | 31,298 | Not detected |
| Nawa | Tipp City | 29,974 | Not detected |
| Kent City Pws | Kent | 29,662 | Not detected |
| North Ridgeville City Pws | North Ridgeville | 29,465 | Not detected |
| Zanesville Pws | Zanesville | 29,381 | Not detected |
| Xenia City Pws | Xenia | 29,000 | Not detected |
| Highland County Water Company, Inc. | Hillsboro | 28,421 | Not detected |
| Perrysburg City Pws | — | 27,000 | Not detected |