Results from entry points (water leaving treatment, not household taps) of public water systems sampled under EPA's Fifth Unregulated Contaminant Monitoring Rule. Click a county to see every water system serving it, or turn on service areas and click a location to see the systems that serve that spot.
347 of the 1,695 public water systems listed for Ohio were sampled. Sorted by the highest single result relative to EPA's 2024 limits. Each name links to a page with all of that system's results. All 1,695 Ohio systems, including those not tested · Download all Ohio results (CSV, gzip)
| System | PWSID | City | Population | PFOA (ppt) | PFOS (ppt) | HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Kings Island Pws | OH8345615 | Kings Island | 31,753 | <MRL | 28.9 | 0.002 | PFOS ≥ 3 × its limit |
| Mcdonald Village Pws | OH7802003 | Mcdonald | 4,236 | <MRL | 21.2 | 1.022 | PFOS ≥ 3 × its limit |
| Girard City | OH7801103 | Girard | 13,263 | <MRL | 20.1 | 1.032 | PFOS ≥ 3 × its limit |
| Warren Comm W And S Assn 2 | OH8402703 | Marietta | 7,215 | 20 | <MRL | 0.003 | PFOA ≥ 3 × its limit |
| Youngstown City Pws | OH5002303 | Youngstown | 130,530 | <MRL | 19.3 | 0.75 | PFOS ≥ 3 × its limit |
| Putnam Community Water Association Pws | OH8400712 | Marietta | 2,744 | 16.9 | <MRL | 0.35 | PFOA ≥ 3 × its limit |
| Lordstown Village Pws | OH7804403 | Lordstown | 3,515 | <MRL | 16 | 0.64 | PFOS ≥ 3 × its limit |
| Loveland City Pws | OH1300812 | Loveland | 12,800 | <MRL | 16 | 0.002 | PFOS ≥ 3 × its limit |
| Western Water Company | OH8300512 | Morrow | 39,508 | <MRL | 14.1 | 0 | PFOS ≥ 3 × its limit |
| Wright-Patterson Afb Area B Pws | OH2903312 | Vandalia | 11,034 | 5.5 | 14 | 1.902 | PFOS ≥ 3 × its limit |
| Caldwell Village Pws | OH6100011 | Caldwell | 3,300 | 13 | <MRL | 0 | PFOA ≥ 3 × its limit |
| Trumbull Co. - Howland Twp Pws | OH7806303 | Vienna | 6,396 | 4.4 | 13 | 0.56 | PFOS ≥ 3 × its limit |
| Canfield City Pws | OH5000503 | Canfield | 7,706 | 4.2 | 12.4 | 0.53 | PFOS ≥ 3 × its limit |
| Indian Hill City Pws | OH3101112 | Cincinnati | 15,000 | <MRL | 12.4 | 0.002 | PFOS ≥ 3 × its limit |
| Dayton Va Bldg 410 | OH5750618 | Dayton | 125 | <MRL | 10.5 | 1.07 | PFOS 1–3 × its limit |
| Clermont Public Water System | OH1302212 | Batavia | 133,059 | <MRL | 10.1 | 0.002 | PFOS 1–3 × its limit |
| Dayton Public Water System | OH5703512 | Dayton | 141,407 | <MRL | 10 | 0.98 | PFOS 1–3 × its limit |
| Guernsey Co. Water Dept. | OH3000603 | Cambridge | 8,891 | 9.8 | <MRL | 0 | PFOA 1–3 × its limit |
| Montgomery County Water Services 1 Pws | OH5701315 | Kettering | 150,207 | <MRL | 9.6 | 1.071 | PFOS 1–3 × its limit |
| Yellow Springs Village Pws | OH2903012 | Yellow Springs | 3,761 | <MRL | 9.2 | 0 | PFOS 1–3 × its limit |
| Trumbull Co. - Southeast Pws | OH7803203 | Vienna | 9,931 | 4 | 9.1 | 0.42 | PFOS 1–3 × its limit |
| Niles City Pws | OH7802403 | Niles | 21,961 | <MRL | 9 | 0.36 | PFOS 1–3 × its limit |
| Jackson/Milton Metro Water District Pws | OH5054212 | Youngstown | 3,728 | 4.9 | 8.5 | 0.37 | PFOS 1–3 × its limit |
| Barnesville | OH0700011 | Barnesville | 6,500 | 8.1 | <MRL | 0 | PFOA 1–3 × its limit |
| Bethel Village Pws | OH1300116 | Bethel | 2,620 | 7.9 | <MRL | 0 | PFOA 1–3 × its limit |
| Milford City Pws | OH1301012 | Milford | 6,700 | 4.1 | 7.8 | 0.323 | PFOS 1–3 × its limit |
| Leading Creek Conservancy District | OH5300012 | Rutland | 6,663 | 7.6 | <MRL | 0 | PFOA 1–3 × its limit |
| Montgomery County Water Services 2 Pws | OH5701503 | Kettering | 83,033 | <MRL | 7.6 | 0.942 | PFOS 1–3 × its limit |
| Gallia Co Rural Water Association | OH2700012 | Gallipolis | 20,995 | 7.5 | <MRL | 0 | PFOA 1–3 × its limit |
| Tate-Monroe Water Association Pws | OH1301312 | New Richmond | 24,092 | 7.4 | <MRL | 0 | PFOA 1–3 × its limit |
| Akron City Pws | OH7700011 | Kent | 280,000 | 7.3 | <MRL | 0 | PFOA 1–3 × its limit |
| Wilmington City Pws | OH1401211 | Wilmington | 12,401 | <MRL | 7.3 | 0.7 | PFOS 1–3 × its limit |
| Gallipolis Pws | OH2700112 | Gallipolis | 7,134 | 7.2 | <MRL | 0 | PFOA 1–3 × its limit |
| Sanitary District #4 | OH2501003 | Columbus | 8,575 | 7.2 | <MRL | 0.005 | PFOA 1–3 × its limit |
| Grandview Medical Center Pws | OH5750615 | Dayton | 1,850 | <MRL | 7.1 | 1.052 | PFOS 1–3 × its limit |
| Springboro Pws | OH8301412 | Springboro | 19,263 | 6.9 | 5.7 | 0.382 | PFOA 1–3 × its limit |
| Hecla Water Association | OH4401612 | Ironton | 34,942 | 6.8 | <MRL | 0.552 | PFOA 1–3 × its limit |
| Newton Falls City | OH7802311 | Newton Falls | 6,109 | 6.7 | 5.6 | 0.11 | PFOA 1–3 × its limit |
| St. Clairsville, City Of Pws | OH0701516 | St. Clairsville | 5,097 | 6.4 | <MRL | 0 | PFOA 1–3 × its limit |
| Greenville City Pws | OH1900714 | Greenville | 13,227 | <MRL | 6.3 | 0.59 | PFOS 1–3 × its limit |
| Cincinnati Public Water System | OH3102612 | Cincinnati | 800,000 | <MRL | 6.1 | 0.002 | PFOS 1–3 × its limit |
| Martins Ferry Public Water System | OH0701212 | Martins Ferry | 6,980 | 6.1 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Shadyside Public Water System | OH0701612 | Barnesville | 3,689 | 6 | <MRL | 1.175 | PFOA 1–3 × its limit |
| Bellbrook Water Works | OH2901112 | Bellbrook | 9,475 | <MRL | 5.7 | 0.333 | PFOS 1–3 × its limit |
| Bexley City Pws | OH2500103 | Bexley | 14,250 | 5.6 | <MRL | 0.004 | PFOA 1–3 × its limit |
| Cambridge, City Of | OH3000111 | Cambridge | 10,520 | 5.6 | <MRL | 0 | PFOA 1–3 × its limit |
| Marietta City Pws | OH8400412 | Marietta | 18,707 | 5.2 | 5.6 | 0.002 | PFOS 1–3 × its limit |
| Ironton | OH4400711 | Ironton | 11,129 | 5.5 | <MRL | 0.67 | PFOA 1–3 × its limit |
| Portsmouth City | OH7300111 | Portsmouth | 40,475 | 5.4 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Columbus Public Water System | OH2504412 | Columbus | 1,309,468 | 5.3 | <MRL | 0.006 | PFOA 1–3 × its limit |
| Hamilton Public Water System | OH0904012 | Fairfield | 62,447 | 5.3 | <MRL | 0.412 | PFOA 1–3 × its limit |
| Wright-Patterson Afb Area A Pws | OH2903412 | Vandalia | 16,551 | <MRL | 5 | 1.304 | Hazard Index 1–3 × its limit |
| Union City Pws | OH5702512 | Union | 7,000 | 4.8 | <MRL | 0.01 | PFOA 1–3 × its limit |
| Wooster City Pws | OH8504512 | Wooster | 26,618 | 4.8 | <MRL | 0.337 | PFOA 1–3 × its limit |
| Georgetown Village Pws | OH0800503 | Georgetown | 4,331 | 4.7 | <MRL | 0 | PFOA 1–3 × its limit |
| Middletown City Pws | OH0901712 | Trenton | 51,229 | <MRL | 4.3 | 0 | PFOS 1–3 × its limit |
| Aqua Ohio - Lawrence County | OH4400803 | Westerville | 8,130 | 4.2 | <MRL | 0 | PFOA 1–3 × its limit |
| Del-Co Water Company, Inc. | OH2101412 | Delaware | 150,000 | 4.2 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Franklin Public Water System | OH8300412 | Franklin | 11,690 | <MRL | 4.1 | 0 | PFOS 1–3 × its limit |
| Maysville Regional Water | OH6001411 | White Cottage | 6,540 | 4 | <MRL | 0 | PFOA 1–3 × its limit |
| South Point Village | OH4401212 | South Point | 4,133 | <MRL | <MRL | 0.852 | Hazard Index below its limit |
| Cincinnati Childrens Hosp Ionization Sys | OH3139912 | Cincinnati | 1,514 | <MRL | <MRL | 0.63 | Hazard Index below its limit |
| Fairfield City Pws | OH0900715 | Hamilton | 44,907 | <MRL | <MRL | 0.57 | Hazard Index below its limit |
| Waverly City Pws | OH6600912 | Waverly | 4,433 | <MRL | <MRL | 0.53 | Hazard Index below its limit |
| Butler Co. Water District 2 Pws | OH0900303 | Hamilton | 116,572 | <MRL | <MRL | 0.472 | Hazard Index below its limit |
| Wauseon City Pws | OH2600111 | Wauseon, | 7,568 | <MRL | <MRL | 0.462 | Hazard Index below its limit |
| Scioto Water Inc.-Sugar Camp | OH7300903 | Franklin Furnace | 6,458 | <MRL | <MRL | 0.42 | Hazard Index below its limit |
| Oakwood City Pws | OH5701915 | Oakwood | 9,572 | <MRL | <MRL | 0.352 | Hazard Index below its limit |
| Jefferson Co W And S District- A | OH4100803 | Steubenville | 2,635 | <MRL | <MRL | 0.342 | Hazard Index below its limit |
| Trenton City Pws | OH0903012 | Trenton | 13,012 | <MRL | <MRL | 0.311 | Hazard Index below its limit |
| Oxford City Pws | OH0902312 | Somerville | 24,000 | <MRL | <MRL | 0.006 | Hazard Index below its limit |
| Bluffton Village | OH0200112 | Bluffton | 4,082 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| Ottawa Village | OH6900711 | Ottawa | 4,393 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| East Liverpool City | OH1500811 | East Liverpool | 12,586 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| New Carlisle City Pws | OH1203312 | New Carlisle | 5,800 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Waterford Water/Sewer Association | OH8401112 | Waterford | 770 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Bellaire Public Water System | OH0700114 | Bellaire | 4,278 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bellefontaine City Pws | OH4600112 | Bellefontaine | 13,249 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bowling Green City | OH8700311 | Bowling Green | 31,578 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Brookville Municipality Pws | OH5700203 | Brookville | 5,923 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Chillicothe City Pws | OH7100112 | Chillicothe | 21,725 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Jefferson Co W And S District - M | OH4101103 | Wintersville | 13,983 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Muskingum County Water - Se | OH6000412 | Zanesville | 21,540 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Napoleon City | OH3500811 | Napoleon | 8,858 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Oberlin Water Department | OH4700911 | Lagrange | 8,600 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Southwest Regional Water District | OH0903912 | Hamilton | 42,856 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Toronto Pws | OH4102811 | Toronto | 5,676 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Trotwood City Pws | OH5702403 | Trotwood | 9,000 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Wintersville Village Pws | OH4103003 | Wintersville | 3,924 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Zanesville Pws | OH6002712 | Zanesville | 29,381 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Alliance City Pws | OH7600011 | Alliance | 22,232 | <MRL | <MRL | 0 | Other PFAS detected |
| Aqua Ohio - Massillon Pws | OH7604512 | Massillon | 95,636 | <MRL | <MRL | 0 | Other PFAS detected |
| Aqua Ohio - Masury | OH7802711 | Struthers | 4,019 | <MRL | <MRL | 0 | Other PFAS detected |
| Aqua Ohio - Struthers | OH5001611 | Struthers | 58,551 | <MRL | <MRL | 0 | Other PFAS detected |
| Bellevue City | OH3900011 | Bellevue | 8,236 | <MRL | <MRL | 0 | Other PFAS detected |
| Belpre City Pws | OH8400012 | Belpre | 6,441 | <MRL | <MRL | 0 | Other PFAS detected |
| Blanchester Village Pws | OH1400111 | Fayetteville | 4,243 | <MRL | <MRL | 0 | Other PFAS detected |
| Celina, City Of | OH5400011 | Celina | 11,682 | <MRL | <MRL | 0 | Other PFAS detected |
| Clyde City | OH7200211 | Clyde | 6,325 | <MRL | <MRL | 0 | Other PFAS detected |
| Commercial Point Village | OH6503512 | Commercial Point | 3,497 | <MRL | <MRL | 0 | Other PFAS detected |
| Defiance City | OH2000111 | Defiance | 16,494 | <MRL | <MRL | 0 | Other PFAS detected |
| Delta Village | OH2600311 | Delta | 3,518 | <MRL | <MRL | 0 | Other PFAS detected |
| Elida Village | OH0200503 | Elida | 4,109 | <MRL | <MRL | 0 | Other PFAS detected |
| Galion City | OH1700211 | Galion | 10,453 | <MRL | <MRL | 0 | Other PFAS detected |
| Hubbard City Pws | OH7801415 | Hubbard | 8,362 | <MRL | <MRL | 0 | Other PFAS detected |
| Jackson, City Of | OH4000111 | Jackson | 9,691 | <MRL | <MRL | 0 | Other PFAS detected |
| Jefferson Regional Water Authority | OH5703012 | Miamisburg | 4,813 | <MRL | <MRL | 0 | Other PFAS detected |
| Lebanon City | OH8304112 | Lebanon | 20,700 | <MRL | <MRL | 0 | Other PFAS detected |
| Lima City | OH0200811 | Lima | 65,619 | <MRL | <MRL | 0 | Other PFAS detected |
| Louisville City Pws | OH7603012 | Louisville | 9,186 | <MRL | <MRL | 0 | Other PFAS detected |
| Medina City Pws | OH5200514 | Medina | 25,956 | <MRL | <MRL | 0 | Other PFAS detected |
| Medina Co/Northwest Pws | OH5201903 | Medina | 46,324 | <MRL | <MRL | 0 | Other PFAS detected |
| Mount Orab Village Pws | OH0801011 | Mount Orab | 6,607 | <MRL | <MRL | 0 | Other PFAS detected |
| Newark City Pws | OH4502314 | Newark | 49,934 | <MRL | <MRL | 0 | Other PFAS detected |
| North Baltimore Village | OH8701611 | North Baltimore | 3,432 | <MRL | <MRL | 0 | Other PFAS detected |
| Northern Ohio Rural Water-South District | OH3946712 | Norwalk | 5,226 | <MRL | <MRL | 0 | Other PFAS detected |
| Northwest Regional Water District | OH7300003 | Mcdermott | 11,059 | <MRL | <MRL | 0 | Other PFAS detected |
| Northwestern W And Sd - Oregon Wtln 200 | OH8704203 | Bowling Green | 9,629 | <MRL | <MRL | 0 | Other PFAS detected |
| Northwestern W And Sd - Portage | OH8704103 | Bowling Green | 4,776 | <MRL | <MRL | 0 | Other PFAS detected |
| Norwalk City Pws | OH3901111 | Norwalk | 17,466 | <MRL | <MRL | 0 | Other PFAS detected |
| Oregon City | OH4800911 | Oregon | 19,950 | <MRL | <MRL | 0 | Other PFAS detected |
| Ottawa County Regional Water District | OH6205011 | Port Clinton | 20,428 | <MRL | <MRL | 0 | Other PFAS detected |
| Paulding Village Pws | OH6300411 | Paulding | 3,605 | <MRL | <MRL | 0 | Other PFAS detected |
| Pike Water, Inc.-Plant Pws | OH6602412 | Waverly | 15,487 | <MRL | <MRL | 0 | Other PFAS detected |
| Piqua City Pws | OH5501211 | Piqua | 20,354 | <MRL | <MRL | 0 | Other PFAS detected |
| Ravenna City Pws | OH6703211 | Ravenna | 16,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Reading City Pws | OH3101812 | Reading | 9,506 | <MRL | <MRL | 0 | Other PFAS detected |
| Reynoldsburg City Pws | OH2503203 | Reynoldsburg | 37,847 | <MRL | <MRL | 0 | Other PFAS detected |
| Ross County Water Co Inc | OH7101412 | Chillicothe | 35,345 | <MRL | <MRL | 0 | Other PFAS detected |
| Rural Lorain Co. Water A | OH4701803 | Lagrange | 73,125 | <MRL | <MRL | 0 | Other PFAS detected |
| Scioto Co. Regional Water District #1 | OH7300212 | Lucasville | 13,820 | <MRL | <MRL | 0 | Other PFAS detected |
| Shelby City | OH7004511 | Shelby | 9,453 | <MRL | <MRL | 0 | Other PFAS detected |
| Toledo City Of | OH4801411 | Toledo | 360,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Trumbull Co. - Bazetta/Champion | OH7804303 | Vienna | 8,270 | <MRL | <MRL | 0 | Other PFAS detected |
| Uh - Cleveland Medical Center | OH1841113 | Cleveland | 11,395 | <MRL | <MRL | 0 | Other PFAS detected |
| Urbana City Pws | OH1101212 | Urbana | 11,428 | <MRL | <MRL | 0 | Other PFAS detected |
| Warren City Pws | OH7803811 | Warren | 49,130 | <MRL | <MRL | 0 | Other PFAS detected |
| Warren Co. Socialville Pws | OH8304203 | 13,216 | <MRL | <MRL | 0 | Other PFAS detected | |
| Waterville City | OH4801503 | Waterville | 6,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Wellston City Pws | OH4001912 | Wellston | 5,846 | <MRL | <MRL | 0 | Other PFAS detected |
| Westerville City Pws | OH2503411 | Pataskala | 39,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Whitehouse Village | OH4801612 | Whitehouse | 5,200 | <MRL | <MRL | 0 | Other PFAS detected |
| Ada Village | OH3300012 | Ada | 5,334 | <MRL | <MRL | 0 | No PFAS detected |
| Adams County Regional Water District | OH0100012 | West Union | 21,810 | <MRL | <MRL | 0 | No PFAS detected |
| Amherst City Pws | OH4700003 | Amherst | 11,797 | <MRL | <MRL | 0 | No PFAS detected |
| Andover-Camplands Water | OH0400212 | Andover | 6,009 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Ashtabula | OH0400711 | Ashtabula | 32,342 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Aurora E | OH6700512 | Massillon | 766 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Blacklick | OH2502412 | Westerville | 7,100 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Huber Ridge Pws | OH2502512 | Westerville | 5,393 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Lake Darby | OH2502612 | Westerville | 3,562 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Marion | OH5100414 | Marion | 47,102 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Mentor | OH4301511 | Mentor | 74,500 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Preble County | OH6835203 | Westerville | 1,748 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Tiffin | OH7400614 | Marion | 20,279 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Ohio - Village Of Jefferson | OH0401812 | Ashtabula | 3,226 | <MRL | <MRL | 0 | No PFAS detected |
| Archbold Village | OH2600011 | Archbold | 5,586 | <MRL | <MRL | 0 | No PFAS detected |
| Ashland City | OH0300112 | Ashland | 20,648 | <MRL | <MRL | 0 | No PFAS detected |
| Ashtabula County Water System | OH0400803 | Jefferson | 14,757 | <MRL | <MRL | 0 | No PFAS detected |
| Ashville Village Pws | OH6500012 | Ashville | 4,529 | <MRL | <MRL | 0 | No PFAS detected |
| Athens Pws | OH0500212 | Athens | 32,725 | <MRL | <MRL | 0 | No PFAS detected |
| Aurora City - Cleveland Pws | OH6789112 | Aurora | 15,852 | <MRL | <MRL | 0 | No PFAS detected |
| Avon City Pws | OH4700203 | Avon | 24,060 | <MRL | <MRL | 0 | No PFAS detected |
| Avon Lake City Pws | OH4700311 | Avon Lake | 23,659 | <MRL | <MRL | 0 | No PFAS detected |
| Barberton City | OH7700411 | Norton | 31,298 | <MRL | <MRL | 0 | No PFAS detected |
| Bedford City Pws | OH1800003 | Bedford | 13,149 | <MRL | <MRL | 0 | No PFAS detected |
| Belmont Co. Sanitary District 3 Pws | OH0700412 | Barnesville | 26,822 | <MRL | <MRL | 0 | No PFAS detected |
| Berea City Pws | OH1800111 | Berea | 18,789 | <MRL | <MRL | 0 | No PFAS detected |
| Bradford Village Pws | OH1900212 | Bradford | 2,000 | <MRL | <MRL | 0 | No PFAS detected |
| Brown County Rural Water | OH0802012 | Ripley | 32,090 | <MRL | <MRL | 0 | No PFAS detected |
| Bryan City Pws | OH8600012 | Bryan | 8,729 | <MRL | <MRL | 0 | No PFAS detected |
| Buckeye Water District - Ohio River | OH1502911 | Wellsville | 10,300 | <MRL | <MRL | 0 | No PFAS detected |
| Bucyrus City | OH1700011 | Bucyrus | 12,570 | <MRL | <MRL | 0 | No PFAS detected |
| Byesville | OH3001212 | Byesville | 5,104 | <MRL | <MRL | 0 | No PFAS detected |
| Cadiz Village Pws | OH3400214 | Cadiz | 3,353 | <MRL | <MRL | 0 | No PFAS detected |
| Canal Fulton City Pws | OH7600912 | Canal Fulton | 5,323 | <MRL | <MRL | 0 | No PFAS detected |
| Canal Winchester City Pws | OH2500312 | Canal Winchester | 9,286 | <MRL | <MRL | 0 | No PFAS detected |
| Canton Public Water System | OH7608112 | Canton | 107,113 | <MRL | <MRL | 0 | No PFAS detected |
| Carey Village Pws | OH8800012 | Carey | 3,674 | <MRL | <MRL | 0 | No PFAS detected |
| Cedarville University | OH2903612 | Cedarville | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Chagrin Falls Village Pws | OH1800212 | Chagrin Falls | 4,991 | <MRL | <MRL | 0 | No PFAS detected |
| Chardon City Pws | OH2800412 | Chardon | 5,247 | <MRL | <MRL | 0 | No PFAS detected |
| Chillicothe Correctional Institution | OH7101212 | Oak Hill | 9,000 | <MRL | <MRL | 0 | No PFAS detected |
| Circleville City Pws | OH6500412 | Circleville | 13,927 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Heath Pws | OH4500912 | Heath | 10,310 | <MRL | <MRL | 0 | No PFAS detected |
| Clark County Green Meadows 2 Pws | OH1200703 | Springfield | 3,008 | <MRL | <MRL | 0 | No PFAS detected |
| Clark County Northridge Pws | OH1201003 | Springfield | 8,874 | <MRL | <MRL | 0 | No PFAS detected |
| Clark County Park Layne Pws | OH1201112 | Springfield | 4,221 | <MRL | <MRL | 0 | No PFAS detected |
| Cleveland Public Water System | OH1801212 | Cleveland | 1,308,955 | <MRL | <MRL | 0 | No PFAS detected |
| Cleves Village Pws | OH3100512 | Cleves | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Coldwater Village | OH5400112 | Coldwater | 4,774 | <MRL | <MRL | 0 | No PFAS detected |
| Columbiana City Pws | OH1500312 | Columbiana | 6,727 | <MRL | <MRL | 0 | No PFAS detected |
| Columbus Grove Village | OH6900112 | Columbus Grove | 2,137 | <MRL | <MRL | 0 | No PFAS detected |
| Conneaut | OH0400411 | Conneaut | 12,538 | <MRL | <MRL | 0 | No PFAS detected |
| Cortland City Pws | OH7800512 | Cortland | 7,105 | <MRL | <MRL | 0 | No PFAS detected |
| Coshocton Pws | OH1600012 | Coshocton | 14,319 | <MRL | <MRL | 0 | No PFAS detected |
| Crestline Village Pws | OH1700112 | Crestline | 4,525 | <MRL | <MRL | 0 | No PFAS detected |
| Cuyahoga Falls City Pws | OH7701012 | Cuyahoga Falls | 51,114 | <MRL | <MRL | 0 | No PFAS detected |
| Delaware City Pws | OH2100311 | Delaware | 43,895 | <MRL | <MRL | 0 | No PFAS detected |
| Delphos City | OH0200412 | Delphos | 7,101 | <MRL | <MRL | 0 | No PFAS detected |
| Dover City Pws | OH7900412 | Dover | 13,253 | <MRL | <MRL | 0 | No PFAS detected |
| Earnhart Hill Water District Pws | OH6500812 | Circleville | 10,738 | <MRL | <MRL | 0 | No PFAS detected |
| East Palestine Village Pws | OH1500912 | East Palestine | 4,761 | <MRL | <MRL | 0 | No PFAS detected |
| Eaton Public Water System | OH6801612 | W. Alexandria | 8,400 | <MRL | <MRL | 0 | No PFAS detected |
| Elyria Water Department | OH4700411 | Lorain | 68,000 | <MRL | <MRL | 0 | No PFAS detected |
| Englewood City Pws | OH5700812 | Englewood | 13,463 | <MRL | <MRL | 0 | No PFAS detected |
| Erie Co Margaretta District | OH2200203 | Huron | 5,131 | <MRL | <MRL | 0 | No PFAS detected |
| Erie Co Perkins District | OH2200603 | Huron | 17,241 | <MRL | <MRL | 0 | No PFAS detected |
| Fairborn Public Water System | OH2900612 | Jamestown | 34,620 | <MRL | <MRL | 0 | No PFAS detected |
| Fairfield County Utilities Pws | OH2301912 | Lancaster | 19,113 | <MRL | <MRL | 0 | No PFAS detected |
| Felicity Village Pws | OH1300612 | Felicity | 1,573 | <MRL | <MRL | 0 | No PFAS detected |
| Findlay City Pws | OH3200111 | Findlay | 54,040 | <MRL | <MRL | 0 | No PFAS detected |
| Fostoria City | OH7400411 | Fostoria | 13,441 | <MRL | <MRL | 0 | No PFAS detected |
| Fremont City | OH7200311 | Fremont | 18,319 | <MRL | <MRL | 0 | No PFAS detected |
| Gahanna City Pws | OH2501303 | Glenford | 33,258 | <MRL | <MRL | 0 | No PFAS detected |
| Gb Fabrication | OH7049512 | Shelby | 26 | <MRL | <MRL | 0 | No PFAS detected |
| Geneva City Pws | OH0401712 | Geneva | 5,924 | <MRL | <MRL | 0 | No PFAS detected |
| Germantown City Pws | OH5701012 | Germantown | 5,547 | <MRL | <MRL | 0 | No PFAS detected |
| Gnadenhutten | OH7900512 | Gnadenhutten | 1,240 | <MRL | <MRL | 0 | No PFAS detected |
| Granville, Village Of | OH4500612 | Granville | 5,946 | <MRL | <MRL | 0 | No PFAS detected |
| Greene Co.-Northwest Reg Water | OH2903512 | Beavercreek | 41,895 | <MRL | <MRL | 0 | No PFAS detected |
| Greene County Eastern Regional Pws | OH2906103 | Beavercreek | 4,800 | <MRL | <MRL | 0 | No PFAS detected |
| Greenfield Twp Water District | OH2301812 | Lancaster | 490 | <MRL | <MRL | 0 | No PFAS detected |
| Greenfield Village Pws | OH3600312 | Greenfield | 4,600 | <MRL | <MRL | 0 | No PFAS detected |
| Groveport Pws | OH2501512 | Groveport | 3,229 | <MRL | <MRL | 0 | No PFAS detected |
| Harrison City Pws | OH3100812 | Harrison | 11,600 | <MRL | <MRL | 0 | No PFAS detected |
| Hdma - Benton Rd Pws | OH8035512 | Marysville | 11,025 | <MRL | <MRL | 0 | No PFAS detected |
| Hicksville Village | OH2000212 | Hicksville | 3,600 | <MRL | <MRL | 0 | No PFAS detected |
| Highland County Water Company, Inc. | OH3600514 | Hillsboro | 28,421 | <MRL | <MRL | 0 | No PFAS detected |
| Hillsboro City | OH3600614 | Hillsboro | 6,650 | <MRL | <MRL | 0 | No PFAS detected |
| Hollywood Gaming @ Mvrc | OH5055013 | Austintown | 7,304 | <MRL | <MRL | 0 | No PFAS detected |
| Honda Dma Anna Engine Plant | OH7537812 | Anna | 3,400 | <MRL | <MRL | 0 | No PFAS detected |
| Honda Dma East Liberty Wtp | OH4643512 | Marysville | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Huber Heights Public Water System | OH5703612 | Huber Heights | 43,439 | <MRL | <MRL | 0 | No PFAS detected |
| Hudson City Pws | OH7701612 | Hudson | 8,385 | <MRL | <MRL | 0 | No PFAS detected |
| Huron City | OH2201011 | Huron | 6,893 | <MRL | <MRL | 0 | No PFAS detected |
| Jackson Co. Water Company-Wtp | OH4002012 | Jackson | 15,984 | <MRL | <MRL | 0 | No PFAS detected |
| Jefferson Water And Sewer District Pws | OH2504012 | Blacklick | 11,294 | <MRL | <MRL | 0 | No PFAS detected |
| Johnstown City Pws | OH4501512 | Johnstown | 5,200 | <MRL | <MRL | 0 | No PFAS detected |
| Kent City Pws | OH6701812 | Kent | 29,662 | <MRL | <MRL | 0 | No PFAS detected |
| Kenton City | OH3300612 | Kenton | 8,360 | <MRL | <MRL | 0 | No PFAS detected |
| Knox County Water And Wastewater Pws | OH4202012 | Mount Vernon | 8,250 | <MRL | <MRL | 0 | No PFAS detected |
| Lake County East Water Subdistrict | OH4302911 | Painesville | 40,656 | <MRL | <MRL | 0 | No PFAS detected |
| Lake County West Water Subdistrict | OH4302411 | Painesville | 78,379 | <MRL | <MRL | 0 | No PFAS detected |
| Lakewood City Pws | OH1801003 | Lakewood | 50,942 | <MRL | <MRL | 0 | No PFAS detected |
| Lancaster City Pws | OH2301012 | Lancaster | 40,400 | <MRL | <MRL | 0 | No PFAS detected |
| Le-Ax Regional Water District Pws | OH0501111 | Athens | 19,311 | <MRL | <MRL | 0 | No PFAS detected |
| Lebanon Correctional Institution | OH8301012 | Lebanon | 3,410 | <MRL | <MRL | 0 | No PFAS detected |
| Lexington Village | OH7002212 | Lexington | 4,825 | <MRL | <MRL | 0 | No PFAS detected |
| Licking Regional Water District | OH4505412 | Baltimore | 17,818 | <MRL | <MRL | 0 | No PFAS detected |
| Little Hocking Water Association, Inc. | OH8400212 | Little Hocking | 9,892 | <MRL | <MRL | 0 | No PFAS detected |
| Lockland Village Pws | OH3101212 | Lockland | 3,486 | <MRL | <MRL | 0 | No PFAS detected |
| Logan, City Of | OH3700612 | Logan | 6,704 | <MRL | <MRL | 0 | No PFAS detected |
| Lorain City Pws | OH4700711 | Lorain | 64,152 | <MRL | <MRL | 0 | No PFAS detected |
| Malvern Village Pws | OH1000112 | Malvern | 1,200 | <MRL | <MRL | 0 | No PFAS detected |
| Mansfield City | OH7002914 | Mansfield | 51,000 | <MRL | <MRL | 0 | No PFAS detected |
| Marysville City Pws | OH8000314 | Marysville | 25,571 | <MRL | <MRL | 0 | No PFAS detected |
| Maumee City | OH4800603 | Maumee | 14,286 | <MRL | <MRL | 0 | No PFAS detected |
| Medina Co/Southern Water Dist Pws | OH5260712 | Columbia Station | 4,708 | <MRL | <MRL | 0 | No PFAS detected |
| Miami Co-Camp Troy Pws | OH5502503 | Troy | 3,813 | <MRL | <MRL | 0 | No PFAS detected |
| Miamisburg City Pws | OH5701212 | Miamisburg | 19,790 | <MRL | <MRL | 0 | No PFAS detected |
| Mid-Ohio Wsd - Chrisman Avenue Wtp | OH4900712 | Columbus | 10,256 | <MRL | <MRL | 0 | No PFAS detected |
| Mid-Ohio Wsd - Jackson Street Wtp | OH4901112 | Columbus | 4,467 | <MRL | <MRL | 0 | No PFAS detected |
| Mid-Ohio Wsd - Old Springfield Road Wtp | OH4901012 | Columbus | 5,176 | <MRL | <MRL | 0 | No PFAS detected |
| Millersburg Village Pws | OH3800912 | Millersburg | 3,151 | <MRL | <MRL | 0 | No PFAS detected |
| Minerva Village Pws | OH7603812 | Minerva | 3,684 | <MRL | <MRL | 0 | No PFAS detected |
| Monroe City Pws | OH0902012 | Monroe | 15,600 | <MRL | <MRL | 0 | No PFAS detected |
| Monroe Water Systems | OH5600812 | Laings | 4,334 | <MRL | <MRL | 0 | No PFAS detected |
| Montpelier Village | OH8600912 | Montpelier | 4,280 | <MRL | <MRL | 0 | No PFAS detected |
| Mount Vernon City Pws | OH4200812 | Mount Vernon | 16,990 | <MRL | <MRL | 0 | No PFAS detected |
| Mt Gilead Village Pws | OH5900712 | Mt Gilead | 3,503 | <MRL | <MRL | 0 | No PFAS detected |
| Munroe Falls City Pws | OH7702703 | Munroe Falls | 5,042 | <MRL | <MRL | 0 | No PFAS detected |
| Nawa | OH5553612 | Tipp City | 29,974 | <MRL | <MRL | 0 | No PFAS detected |
| Nelsonville Pws | OH0501214 | Nelsonville | 6,656 | <MRL | <MRL | 0 | No PFAS detected |
| New Bremen Village | OH0600512 | New Bremen | 3,034 | <MRL | <MRL | 0 | No PFAS detected |
| New Lebanon Village Pws | OH5701812 | New Lebanon | 3,770 | <MRL | <MRL | 0 | No PFAS detected |
| New Lexington | OH6400411 | New Lexington | 5,161 | <MRL | <MRL | 0 | No PFAS detected |
| New Miami Village Pws | OH0902112 | New Miami | 3,200 | <MRL | <MRL | 0 | No PFAS detected |
| New Philadelphia City Pws | OH7900812 | New Philadelphia | 17,410 | <MRL | <MRL | 0 | No PFAS detected |
| Newcomerstown Village Pws | OH7900912 | Newcomerstown | 3,882 | <MRL | <MRL | 0 | No PFAS detected |
| Nolley Elementary School | OH7778012 | New Franklin | 600 | <MRL | <MRL | 0 | No PFAS detected |
| North Canton City Pws | OH7604312 | N Canton | 24,747 | <MRL | <MRL | 0 | No PFAS detected |
| North Ridgeville City Pws | OH4700803 | North Ridgeville | 37,786 | <MRL | <MRL | 0 | No PFAS detected |
| Northern Ohio Rural Water | OH3902403 | Norwalk | 18,224 | <MRL | <MRL | 0 | No PFAS detected |
| Northern Ohio Rural Water - Nw District | OH2201803 | Norwalk | 6,409 | <MRL | <MRL | 0 | No PFAS detected |
| Northern Perry Co.Water #2 | OH6402703 | New Lexington | 1,802 | <MRL | <MRL | 0 | No PFAS detected |
| Northwestern W And Sd - Toledo Svc Area | OH8752812 | Bowling Green | 19,332 | <MRL | <MRL | 0 | No PFAS detected |
| Norwood City Pws | OH3101703 | Norwood | 19,870 | <MRL | <MRL | 0 | No PFAS detected |
| Oak Harbor Village | OH6202603 | Oak Harbor | 4,400 | <MRL | <MRL | 0 | No PFAS detected |
| Oakdale Water District | OH6402403 | Glouster | 250 | <MRL | <MRL | 0 | No PFAS detected |
| Odrc-Pickaway Correction Pws | OH6501712 | Fredricktown | 3,376 | <MRL | <MRL | 0 | No PFAS detected |
| Old Trail School | OH7754712 | Bath | 497 | <MRL | <MRL | 0 | No PFAS detected |
| Ontario City | OH7003512 | Ontario | 6,756 | <MRL | <MRL | 0 | No PFAS detected |
| Orrville City Pws | OH8502712 | Navarre | 8,452 | <MRL | <MRL | 0 | No PFAS detected |
| Painesville City Pws | OH4301611 | Mentor | 31,728 | <MRL | <MRL | 0 | No PFAS detected |
| Pataskala City | OH4502512 | Pataskala | 9,900 | <MRL | <MRL | 0 | No PFAS detected |
| Perrysburg City Pws | OH8701803 | Whitehouse | 27,000 | <MRL | <MRL | 0 | No PFAS detected |
| Pickerington City Pws | OH2301512 | Pickerington | 19,141 | <MRL | <MRL | 0 | No PFAS detected |
| Port Clinton City | OH6203211 | Port Clinton | 6,500 | <MRL | <MRL | 0 | No PFAS detected |
| Portage County Water Resources | OH6702812 | Ravenna | 8,606 | <MRL | <MRL | 0 | No PFAS detected |
| Rattlesnake Pws | OH2437412 | Washington Court House | 7,685 | <MRL | <MRL | 0 | No PFAS detected |
| Rittman City Pws | OH8503012 | Rittman | 6,491 | <MRL | <MRL | 0 | No PFAS detected |
| Salem City | OH1502011 | New Waterford | 16,850 | <MRL | <MRL | 0 | No PFAS detected |
| Sandusky City | OH2201411 | Sandusky | 25,793 | <MRL | <MRL | 0 | No PFAS detected |
| Scioto Water Inc.-Rose Hill | OH7300303 | Franklin Furnace | 8,861 | <MRL | <MRL | 0 | No PFAS detected |
| Scranton Woods | OH2803712 | Chardon | 114 | <MRL | <MRL | 0 | No PFAS detected |
| Sebring Village Pws | OH5001911 | Sebring | 6,058 | <MRL | <MRL | 0 | No PFAS detected |
| Sheffield Lake City Pws | OH4701103 | Sheffield Lake | 9,108 | <MRL | <MRL | 0 | No PFAS detected |
| Sheffield Village Pws | OH4701203 | Sheffield Village | 4,165 | <MRL | <MRL | 0 | No PFAS detected |
| Sidney City Pws | OH7501214 | Sidney | 20,614 | <MRL | <MRL | 0 | No PFAS detected |
| South Lebanon City Pws | OH8301312 | South Lebanon | 7,792 | <MRL | <MRL | 0 | No PFAS detected |
| Southern Perry Co-Congo | OH6401603 | Crooksville | 4,029 | <MRL | <MRL | 0 | No PFAS detected |
| Springfield City Pws | OH1204412 | Springfield | 60,680 | <MRL | <MRL | 0 | No PFAS detected |
| St Marys City | OH0600612 | St Marys | 9,356 | <MRL | <MRL | 0 | No PFAS detected |
| Stark County Water District | OH7607303 | Canton | 6,690 | <MRL | <MRL | 0 | No PFAS detected |
| Steubenville, City Of | OH4102411 | Steubenville | 17,000 | <MRL | <MRL | 0 | No PFAS detected |
| Stow Public Water System | OH7704503 | Stow | 35,437 | <MRL | <MRL | 0 | No PFAS detected |
| Streetsboro City Pws | OH6705003 | Streetsboro | 15,105 | <MRL | <MRL | 0 | No PFAS detected |
| Sunday Creek Valley Water Pws | OH0501503 | Millfield | 5,451 | <MRL | <MRL | 0 | No PFAS detected |
| Swanton Village | OH2601011 | Swanton | 3,855 | <MRL | <MRL | 0 | No PFAS detected |
| Sylvania City | OH4801303 | Sylvania | 21,618 | <MRL | <MRL | 0 | No PFAS detected |
| Tallmadge City Pws | OH7704703 | Tallmadge | 18,394 | <MRL | <MRL | 0 | No PFAS detected |
| Tcmsd-Wilkshire Hills Pws | OH7901612 | Bolivar | 6,587 | <MRL | <MRL | 0 | No PFAS detected |
| Timberlake Water System | OH2501812 | Columbus | 1,600 | <MRL | <MRL | 0 | No PFAS detected |
| Timmons Elementary School | OH2861312 | Chagrin Falls | 375 | <MRL | <MRL | 0 | No PFAS detected |
| Tri-County Block And Brick | OH2637912 | Swanton | 31 | <MRL | <MRL | 0 | No PFAS detected |
| Troy City Pws | OH5501612 | Rossburg | 26,305 | <MRL | <MRL | 0 | No PFAS detected |
| Tuppers Plains/Chester Water District | OH5300612 | Long Bottom | 16,087 | <MRL | <MRL | 0 | No PFAS detected |
| Twin City Water And Sewer District Pws | OH7901711 | Dennison | 9,224 | <MRL | <MRL | 0 | No PFAS detected |
| Upper Sandusky City | OH8800511 | Upper Sandusky | 6,698 | <MRL | <MRL | 0 | No PFAS detected |
| Van Wert City | OH8100611 | Van Wert | 10,846 | <MRL | <MRL | 0 | No PFAS detected |
| Vermilion City | OH2201511 | Vermilion | 10,594 | <MRL | <MRL | 0 | No PFAS detected |
| Wadsworth City Pws | OH5201712 | Wadsworth | 24,356 | <MRL | <MRL | 0 | No PFAS detected |
| Wapakoneta City Pws | OH0600712 | Wapakoneta | 11,000 | <MRL | <MRL | 0 | No PFAS detected |
| Warren Co. Franklin Area Pws | OH8301603 | Lebanon | 36,725 | <MRL | <MRL | 0 | No PFAS detected |
| Warren County | OH8301512 | Lebanon | 99,000 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Court House Pws | OH2400714 | Williamsport | 14,100 | <MRL | <MRL | 0 | No PFAS detected |
| Waynesville Village Pws | OH8302012 | Waynesville | 4,100 | <MRL | <MRL | 0 | No PFAS detected |
| Waynoka Regional Water And Sewer Dist | OH0800811 | Sardinia | 1,860 | <MRL | <MRL | 0 | No PFAS detected |
| Wellington Village Pws | OH4701511 | Wellington | 4,802 | <MRL | <MRL | 0 | No PFAS detected |
| West Carrollton City Pws | OH5702812 | Camden | 8,361 | <MRL | <MRL | 0 | No PFAS detected |
| West Jefferson Village Pws | OH4902012 | West Jefferson | 4,488 | <MRL | <MRL | 0 | No PFAS detected |
| West Milton Village Pws | OH5501711 | West Milton | 4,890 | <MRL | <MRL | 0 | No PFAS detected |
| Willard City | OH3901511 | Willard | 7,099 | <MRL | <MRL | 0 | No PFAS detected |
| Wright State University | OH2902012 | Dayton | 8,948 | <MRL | <MRL | 0 | No PFAS detected |
| Wyoming City Pws | OH3102212 | Cincinnati | 9,700 | <MRL | <MRL | 0 | No PFAS detected |
| Xenia City Pws | OH2902812 | Xenia | 29,000 | <MRL | <MRL | 0 | No PFAS detected |
Highest single result for each system; PFOA and PFOS in ppt (ng/L). Entry-point samples, not tap water; screening comparisons, not compliance determinations.