PFAS contamination data for 16,269 water systems in Ohio, serving 15,820,503 people.
Ohio follows federal EPA MCLs (PFOA/PFOS: 4 ppt).
OH follows EPA federal MCLs. Action levels for PFOA 70 ppt, PFOS 70 ppt (pre-2024 EPA MCL). Updating to match federal standards.
Ohio follows federal EPA MCLs. The state has significant contamination around Wright-Patterson AFB and industrial facilities.
Serious SDWA violator: CARROLLTON VILLAGE, Carroll, OH
PWS ID: OH1000012. County: Carroll
2026-05-11 · Read more →
Serious SDWA violator: CRESTON VILLAGE, Wayne, OH
PWS ID: OH8500312. County: Wayne
2026-05-11 · Read more →
Serious SDWA violator: BRIDGEPORT PUBLIC WATER SYSTEM, Belmont, OH
PWS ID: OH0700612. County: Belmont
2026-05-11 · Read more →
Serious SDWA violator: CALVARY UNITED BAPTIST CHURCH PWS, Shelby, OH
PWS ID: OH7541012. County: Shelby
2026-05-11 · Read more →
Serious SDWA violator: COLUMBUS GROVE VILLAGE, Putnam, OH
PWS ID: OH6900112. County: Putnam
2026-05-11 · Read more →
Free eligibility check — plus weekly MCL, deadline, and funding alerts for Ohio.
| System | City | Population | PFOA (ppt) | PFOS (ppt) | Status |
|---|---|---|---|---|---|
| CLEVELAND PUBLIC WATER SYSTEM OH1801212 | CLEVELAND | 1,308,955 | — | — | Compliant |
| COLUMBUS PUBLIC WATER SYSTEM OH2504412 | COLUMBUS | 1,305,946 | 5.3 | — | Exceeds |
| CINCINNATI PUBLIC WATER SYSTEM OH3102612 | CINCINNATI | 750,200 | — | 6.1 | Exceeds |
| COLUMBUS-HAP CREMEAN WTP OH2500421 | COLUMBUS | 446,812 | — | — | Compliant |
| CLEVELAND,CITY OF-BALDWIN PLT. OH1800311 | CLEVELAND | 424,027 | — | — | Compliant |
| TOLEDO CITY OF OH4801411 | TOLEDO | 360,000 | — | — | Compliant |
| CLEVELAND,CITY OF-MORGAN PLANT OH1800331 | CLEVELAND | 352,888 | — | — | Compliant |
| COLUMBUS-DUBLIN ROAD WTP |
| COLUMBUS |
| 331,072 |
| — |
| — |
| Compliant |
| CLEVELAND,CITY OF-NOTTINGHAM P OH1800341 | CLEVELAND | 326,846 | — | — | Compliant |
| AKRON CITY PWS OH7700011 | KENT | 280,000 | 7.3 | — | Exceeds |
| DAYTON, CITY OF-OTTAWA PLANT OH5700722 | DAYTON | 236,000 | — | — | Compliant |
| CLEVELAND,CITY OF-CROWN PLANT OH1800321 | WESTLAKE | 198,665 | — | — | Compliant |
| DAYTON, CITY OF-MIAMI PLANT OH5700712 | DAYTON | 184,000 | — | — | Compliant |
| MONTGOMERY COUNTY WATER SERVICES 1 PWS OH5701315 | KETTERING | 150,207 | — | 9.6 | Exceeds |
| MONTGOMERY CO:WATER SYSTEM # 1 OH5701303 | DAYTON | 150,000 | — | — | Compliant |
| DEL-CO WATER COMPANY, INC. OH2101412 | DELAWARE | 150,000 | 4.2 | — | Exceeds |
| DAYTON PUBLIC WATER SYSTEM OH5703512 | DAYTON | 141,407 | — | 10 | Exceeds |
| MONTGOMERY CO,GR.MORAINE-BV.CR OH5701312 | DAYTON | 141,000 | — | — | Compliant |
| CLERMONT PUBLIC WATER SYSTEM OH1302212 | BATAVIA | 133,059 | — | 10.1 | Exceeds |
| YOUNGSTOWN CITY PWS OH5002303 | YOUNGSTOWN | 130,530 | — | 19.3 | Exceeds |
| COLUMBUS-PARSONS AVENUE WTP OH2500442 | LOCKBOURNE | 119,329 | — | — | Compliant |
| BUTLER CO. WATER DISTRICT 2 PWS OH0900303 | HAMILTON | 116,572 | — | — | Compliant |
| CANTON PUBLIC WATER SYSTEM OH7608112 | CANTON | 107,113 | — | — | Compliant |
| AQUA OHIO - MASSILLON PWS OH7604512 | MASSILLON | 95,636 | — | — | Compliant |
| MONTGOMERY COUNTY WATER SERVICES 2 PWS OH5701503 | KETTERING | 83,033 | — | 7.6 | Exceeds |
| LAKE COUNTY WEST WATER SUBDISTRICT OH4302411 | PAINESVILLE | 78,379 | — | — | Compliant |
| WARREN COUNTY OH8301512 | LEBANON | 78,299 | — | — | Compliant |
| AQUA OHIO - MENTOR OH4301511 | MENTOR | 74,500 | — | — | Compliant |
| RURAL LORAIN CO. WATER A OH4701803 | LAGRANGE | 73,125 | — | — | Compliant |
| CANTON WATER DEPT-SUGARCREEK OH7601032 | CANTON | 70,000 | — | — | Compliant |
| ELYRIA WATER DEPARTMENT OH4700411 | LORAIN | 68,000 | — | — | Compliant |
| LIMA CITY OH0200811 | LIMA | 65,619 | — | — | Compliant |
| LORAIN CITY PWS OH4700711 | LORAIN | 64,152 | — | — | Compliant |
| CLERMONT COUNTY WATER, BMWTP OH1300431 | AMELIA | 63,191 | — | — | Compliant |
| HAMILTON PUBLIC WATER SYSTEM OH0904012 | FAIRFIELD | 62,447 | 5.3 | — | Exceeds |
| SPRINGFIELD CITY PWS OH1204412 | SPRINGFIELD | 60,680 | — | — | Compliant |
| AQUA OHIO - STRUTHERS OH5001611 | STRUTHERS | 58,551 | — | — | Compliant |
| SAN.ENGR,EASTLAKE WATER SUBDIS OH4302503 | PAINESVILLE | 58,500 | — | — | Compliant |
| FINDLAY CITY OH3200111 | FINDLAY | 54,040 | — | — | Compliant |
| HAMILTON/SOUTH WATER PLANT OH0901022 | HAMILTON | 52,920 | — | — | Compliant |
| MIDDLETOWN CITY PWS OH0901712 | TRENTON | 51,229 | — | 4.3 | Exceeds |
| CUYAHOGA FALLS CITY PWS OH7701012 | CUYAHOGA FALLS | 51,114 | — | — | Compliant |
| MANSFIELD CITY OH7002914 | MANSFIELD | 51,000 | — | — | Compliant |
| LAKEWOOD CITY PWS OH1801003 | LAKEWOOD | 50,942 | — | — | Compliant |
| NEWARK CITY PWS OH4502314 | NEWARK | 49,934 | — | — | Compliant |
| WARREN CITY PWS OH7803811 | WARREN | 49,130 | — | — | Compliant |
| MEDINA CO/NORTHWEST PWS OH5201903 | MEDINA | 46,324 | — | — | Compliant |
| AQUA OHIO - MARION OH5100414 | MARION | 46,317 | — | — | Compliant |
| CLEVELAND HEIGHTS CITY PWS OH1800403 | CLEVELAND HEIGHTS | 46,000 | — | — | Compliant |
| FAIRFIELD CITY PWS OH0900715 | FAIRFIELD | 44,907 | — | — | Compliant |
| DELAWARE CITY PWS OH2100311 | DELAWARE | 43,895 | — | — | Compliant |
| HUBER HEIGHTS PUBLIC WATER SYSTEM OH5703612 | HUBER HEIGHTS | 43,439 | — | — | Compliant |
| SOUTHWEST REGIONAL WATER DISTRICT OH0903912 | HAMILTON | 42,856 | — | — | Compliant |
| GREENE CO.-NORTHWEST REG WATER OH2903512 | BEAVERCREEK | 41,000 | — | — | Compliant |
| LAKE COUNTY EAST WATER SUBDISTRICT OH4302911 | PAINESVILLE | 40,656 | — | — | Compliant |
| PORTSMOUTH CITY OH7300111 | PORTSMOUTH | 40,475 | 5.4 | — | Exceeds |
| LANCASTER CITY PWS OH2301012 | LANCASTER | 40,400 | — | — | Compliant |
| FINDLAY WATER DEPARTMENT OH3200114 | FINDLAY | 40,000 | — | — | Compliant |
| CANTON WATER DEPT-NORTHEAST OH7601012 | CANTON | 40,000 | — | — | Compliant |
| WESTERN WATER COMPANY OH8300512 | MORROW | 39,508 | — | 14.1 | Exceeds |
| WESTERVILLE CITY PWS OH2503411 | PATASKALA | 39,000 | — | — | Compliant |
| REYNOLDSBURG CITY PWS OH2503203 | REYNOLDSBURG | 37,847 | — | — | Compliant |
| STOW PUBLIC WATER SYSTEM OH7704503 | STOW | 35,437 | — | — | Compliant |
| ROSS COUNTY WATER CO INC OH7101412 | CHILLICOTHE | 35,345 | — | — | Compliant |
| HECLA WATER ASSOCIATION OH4401612 | IRONTON | 34,942 | 6.8 | — | Exceeds |
| FAIRBORN PUBLIC WATER SYSTEM OH2900612 | JAMESTOWN | 34,620 | — | — | Compliant |
| GAHANNA CITY PWS OH2501303 | GLENFORD | 33,258 | — | — | Compliant |
| ATHENS PWS OH0500212 | ATHENS | 32,725 | — | — | Compliant |
| AQUA OHIO - ASHTABULA OH0400711 | ASHTABULA | 32,408 | — | — | Compliant |
| BROWN COUNTY RURAL WATER OH0802012 | RIPLEY | 32,090 | — | — | Compliant |
| KINGS ISLAND PWS OH8345615 | KINGS ISLAND | 31,753 | — | 28.9 | Exceeds |
| PAINESVILLE CITY PWS OH4301611 | MENTOR | 31,728 | — | — | Compliant |
| BOWLING GREEN CITY OH8700311 | BOWLING GREEN | 31,578 | — | — | Compliant |
| BARBERTON CITY OH7700411 | NORTON | 31,298 | — | — | Compliant |
| BARBERTON WATER DEPARTMENT OH7700414 | BARBERTON | 30,000 | — | — | Compliant |
| CANTON WATER DEPT-NORTHWEST OH7601022 | CANTON | 30,000 | — | — | Compliant |
| DEL-CO WATER CO/ALUM CR.PLANT OH2100221 | DELAWARE | 29,928 | — | — | Compliant |
| DEL-CO WATER/OLENTANGY PLANT OH2100211 | DELAWARE | 29,928 | — | — | Compliant |
| KENT CITY PWS OH6701812 | KENT | 29,662 | — | — | Compliant |
| NORTH RIDGEVILLE CITY PWS OH4700803 | NORTH RIDGEVILLE | 29,465 | — | — | Compliant |
| ZANESVILLE PWS OH6002712 | ZANESVILLE | 29,381 | — | — | Compliant |
| HUBER HEIGHTS-PLANT #1 OH5702012 | HUBER HEIGHTS | 29,250 | — | — | Compliant |
| XENIA CITY PWS OH2902812 | XENIA | 29,000 | — | — | Compliant |
| CLERMONT CO/ MGS SUB-DISTRICT OH1300312 | BATAVIA | 28,600 | — | — | Compliant |
| EAST CLEVELAND CITY PWS OH1800503 | EAST CLEVELAND | 28,500 | — | — | Compliant |
| HIGHLAND COUNTY WATER COMPANY, INC. OH3600514 | HILLSBORO | 28,421 | — | — | Compliant |
| SAN.ENGR,WEST WATER SUBDIST. OH4302416 | PAINESVILLE | 27,312 | — | — | Compliant |
| PERRYSBURG CITY OH8701803 | WHITEHOUSE | 27,000 | — | — | Compliant |
| BELMONT CO. SANITARY DISTRICT 3 PWS OH0700412 | BARNESVILLE | 26,822 | — | — | Compliant |
| WOOSTER CITY PWS OH8504512 | WOOSTER | 26,618 | 4.8 | — | Exceeds |
| TROY CITY PWS OH5501612 | ROSSBURG | 26,305 | — | — | Compliant |
| MEDINA CITY PWS OH5200514 | MEDINA | 25,956 | — | — | Compliant |
| SANDUSKY CITY OH2201411 | SANDUSKY | 25,793 | — | — | Compliant |
| MARYSVILLE CITY PWS OH8000314 | MARYSVILLE | 25,571 | — | — | Compliant |
| NAWA OH5553612 | TIPP CITY | 24,766 | — | — | Compliant |
| NORTH CANTON CITY PWS OH7604312 | N CANTON | 24,747 | — | — | Compliant |
| WADSWORTH CITY PWS OH5201712 | WADSWORTH | 24,356 | — | — | Compliant |
| TATE-MONROE WATER ASSOCIATION PWS OH1301312 | NEW RICHMOND | 24,092 | 7.4 | — | Exceeds |
| OXFORD CITY PWS OH0902312 | SOMERVILLE | 24,000 | — | — | Compliant |
| AVON CITY PWS OH4700203 | AVON | 23,800 | — | — | Compliant |
| AVON LAKE CITY PWS OH4700311 | AVON LAKE | 23,659 | — | — | Compliant |
| ALLIANCE CITY PWS OH7600011 | ALLIANCE | 22,232 | — | — | Compliant |
| NILES CITY PWS OH7802403 | NILES | 21,961 | — | 9 | Exceeds |
| ADAMS COUNTY REGIONAL WD PWS OH0100012 | WEST UNION | 21,810 | — | — | Compliant |
| CHILLICOTHE CITY PWS OH7100112 | CHILLICOTHE | 21,725 | — | — | Compliant |
| SYLVANIA CITY OH4801303 | SYLVANIA | 21,618 | — | — | Compliant |
| MUSKINGUM COUNTY WATER - SE OH6000412 | ZANESVILLE | 21,540 | — | — | Compliant |
| OHIO-AMER.WATER CO,TIFFIN DIST OH7400611 | TIFFIN | 21,000 | — | — | Compliant |
| GALLIA CO RURAL WATER ASSOCIATION OH2700012 | GALLIPOLIS | 20,995 | 7.5 | — | Exceeds |
| LEBANON CITY OH8304112 | LEBANON | 20,700 | — | — | Compliant |
| ASHLAND CITY OH0300112 | ASHLAND | 20,648 | — | — | Compliant |
| SIDNEY CITY PWS OH7501214 | SIDNEY | 20,614 | — | — | Compliant |
| OTTAWA COUNTY REGIONAL WATER DISTRICT OH6205011 | PORT CLINTON | 20,428 | — | — | Compliant |
| PIQUA CITY PWS OH5501211 | PIQUA | 20,354 | — | — | Compliant |
| AQUA OHIO - TIFFIN OH7400614 | MARION | 20,035 | — | — | Compliant |
| OHIO WATER SERVICE,LEE/GENEVA OH0400811 | GENEVA | 20,000 | — | — | Compliant |
| OREGON CITY OH4800911 | OREGON | 19,950 | — | — | Compliant |
| NORWOOD CITY PWS OH3101703 | NORWOOD | 19,870 | — | — | Compliant |
| MIAMISBURG CITY PWS OH5701212 | MIAMISBURG | 19,790 | — | — | Compliant |
| NORTHWESTERN W AND SD - TOLEDO SVC OH8752812 | BOWLING GREEN | 19,758 | — | — | Compliant |
| LE-AX REGIONAL WATER DISTRICT PWS OH0501111 | ATHENS | 19,311 | — | — | Compliant |
| SPRINGBORO PWS OH8301412 | SPRINGBORO | 19,263 | 6.9 | 5.7 | Exceeds |
| PICKERINGTON CITY PWS OH2301512 | PICKERINGTON | 19,141 | — | — | Compliant |
| SWR WATER DISTRICT SOUTH PLANT PWS OH0904112 | FAIRFIELD | 19,098 | — | — | Compliant |
| BEREA CITY PWS OH1800111 | BEREA | 18,789 | — | — | Compliant |
| MARIETTA CITY PWS OH8400412 | MARIETTA | 18,707 | 5.2 | 5.6 | Exceeds |
| MONTGOMERY CO.RIVERSIDE SUBDIS OH5701603 | DAYTON | 18,700 | — | — | Compliant |
| FREMONT CITY OH7200311 | FREMONT | 18,319 | — | — | Compliant |
| NORTHERN OHIO RURAL WATER OH3902403 | NORWALK | 18,224 | — | — | Compliant |
| TALLMADGE CITY PWS OH7704703 | TALLMADGE | 18,000 | — | — | Compliant |
| LICKING REGIONAL WATER DISTRICT OH4505412 | BALTIMORE | 17,818 | — | — | Compliant |
| SUPT,BELMONT CO.SAN.DIST.NO.3 OH0700411 | SAINT CLAIRSVILLE | 17,800 | — | — | Compliant |
| NEW PHILADELPHIA CITY PWS OH7900812 | NEW PHILADELPHIA | 17,410 | — | — | Compliant |
| ERIE CO PERKINS DISTRICT OH2200603 | HURON | 17,241 | — | — | Compliant |
| FRANKLIN PUBLIC WATER SYSTEM OH8300412 | FRANKLIN | 17,175 | — | 4.1 | Exceeds |
| NORWALK CITY PWS OH3901111 | NORWALK | 17,068 | — | — | Compliant |
| STEUBENVILLE, CITY OF OH4102411 | STEUBENVILLE | 17,000 | — | — | Compliant |
| MOUNT VERNON CITY PWS OH4200812 | MOUNT VERNON | 16,990 | — | — | Compliant |
| SALEM CITY OH1502011 | SALEM | 16,850 | — | — | Compliant |
| WRIGHT-PATTERSON AFB AREA A PWS OH2903412 | VANDALIA | 16,551 | — | 5 | Exceeds |
| DEFIANCE CITY OH2000111 | DEFIANCE | 16,494 | — | — | Compliant |
| TUPPERS PLAINS/CHESTER WATER DISTRICT OH5300612 | LONG BOTTOM | 16,087 | — | — | Compliant |
| DUBLIN, CITY OF OH2504112 | DUBLIN | 16,000 | — | — | Compliant |
| RAVENNA CITY PWS OH6703211 | RAVENNA | 16,000 | — | — | Compliant |
| SUPT,RAVENNA WATER DEPARTMENT OH6703214 | RAVENNA | 16,000 | — | — | Compliant |
| JACKSON CO. WATER COMPANY-WTP OH4002012 | JACKSON | 15,984 | — | — | Compliant |
| SWR DIST SOUTH PLANT OH0902812 | HAMILTON | 15,977 | — | — | Compliant |
| AURORA CITY - CLEVELAND PWS OH6789112 | AURORA | 15,852 | — | — | Compliant |
| MONROE CITY PWS OH0902012 | MONROE | 15,600 | — | — | Compliant |
| PIKE WATER, INC.-PLANT PWS OH6602412 | WAVERLY | 15,487 | — | — | Compliant |
| FAIRFIELD COUNTY UTILITIES PWS OH2301912 | LANCASTER | 15,486 | — | — | Compliant |
| MGR;HIGHLAND COUNTY WATER CO. OH3600512 | HILLSBORO | 15,127 | — | — | Compliant |
| STREETSBORO CITY PWS OH6705003 | STREETSBORO | 15,105 | — | — | Compliant |
| INDIAN HILL CITY PWS OH3101112 | CINCINNATI | 15,000 | — | 12.4 | Exceeds |
| VANDALIA CITY PWS OH5702603 | VANDALIA | 15,000 | — | — | Compliant |
| MAUMEE CITY OH4800603 | MAUMEE | 14,286 | — | — | Compliant |
| BEXLEY CITY PWS OH2500103 | BEXLEY | 14,250 | 5.6 | — | Exceeds |
| GIRARD CITY OH7801103 | GIRARD | 14,122 | — | 20.1 | Exceeds |
| WASHINGTON COURT HOUSE PWS OH2400714 | WILLIAMSPORT | 14,100 | — | — | Compliant |
| JEFFERSON CO W AND S DISTRICT - M OH4101103 | STEUBENVILLE | 13,983 | — | — | Compliant |
| ASHTABULA COUNTY WATER SYSTEM OH0400803 | JEFFERSON | 13,972 | — | — | Compliant |
| CIRCLEVILLE CITY PWS OH6500412 | CIRCLEVILLE | 13,927 | — | — | Compliant |
| SCIOTO CO. REGIONAL WATER DISTRICT #1 OH7300212 | LUCASVILLE | 13,820 | — | — | Compliant |
| COSHOCTON PWS OH1600012 | COSHOCTON | 13,537 | — | — | Compliant |
| ENGLEWOOD CITY PWS OH5700812 | ENGLEWOOD | 13,463 | — | — | Compliant |
| FOSTORIA CITY OH7400411 | FOSTORIA | 13,441 | — | — | Compliant |
| DOVER CITY PWS OH7900412 | DOVER | 13,253 | — | — | Compliant |
| BELLEFONTAINE CITY PWS OH4600112 | BELLEFONTAINE | 13,249 | — | — | Compliant |
| GREENVILLE CITY PWS OH1900714 | GREENVILLE | 13,227 | — | 6.3 | Exceeds |
| WARREN CO. SOCIALVILLE PWS OH8304203 | LEBANON | 13,216 | — | — | Compliant |
| BEDFORD CITY PWS OH1800003 | BEDFORD | 13,149 | — | — | Compliant |
| TRENTON CITY PWS OH0903012 | TRENTON | 13,012 | — | — | Compliant |
| WEST CARROLLTON CITY PWS OH5702812 | CAMDEN | 12,910 | — | — | Compliant |
| WATER SUPT,THIMBLE CREEK SD OH5701703 | DAYTON | 12,856 | — | — | Compliant |
| LOVELAND CITY PWS OH1300812 | LOVELAND | 12,800 | — | 16 | Exceeds |
| EAST LIVERPOOL CITY OH1500811 | EAST LIVERPOOL | 12,586 | — | — | Compliant |
| BUCYRUS CITY OH1700011 | BUCYRUS | 12,570 | — | — | Compliant |
| CONNEAUT OH0400411 | CONNEAUT | 12,538 | — | — | Compliant |
| WILMINGTON CITY PWS OH1401211 | WILMINGTON | 12,401 | — | 7.3 | Exceeds |
| AMHERST CITY PWS OH4700003 | AMHERST | 11,797 | — | — | Compliant |
| WATER SUPT,MEADOWDALE SWD. OH5701403 | DAYTON | 11,704 | — | — | Compliant |
| CELINA CITY OH5400011 | CELINA | 11,682 | — | — | Compliant |
| SUPT,CIRCLEVILLE WATER DEPT. OH6500414 | CIRCLEVILLE | 11,682 | — | — | Compliant |
| HARRISON CITY PWS OH3100812 | HARRISON | 11,600 | — | — | Compliant |
| URBANA CITY PWS OH1101212 | URBANA | 11,428 | — | — | Compliant |
| UH - CLEVELAND MEDICAL CENTER OH1841113 | CLEVELAND | 11,395 | — | — | Compliant |
| JEFFERSON WATER AND SEWER DISTRICT PWS OH2504012 | BLACKLICK | 11,294 | — | — | Compliant |
| SAN.ENGR,EAST WATER SUBDIST. OH4302916 | PAINESVILLE | 11,200 | — | — | Compliant |
| IRONTON OH4400711 | IRONTON | 11,129 | 5.5 | — | Exceeds |
| NORTHWEST REGIONAL WATER DISTRICT OH7300003 | MCDERMOTT | 11,059 | — | — | Compliant |
| WRIGHT-PATTERSON AFB AREA B PWS OH2903312 | VANDALIA | 11,034 | 5.5 | 14 | Exceeds |
| MASON, CITY OF - SOUTH OH8304312 | MASON | 11,000 | — | — | Compliant |
| WAPAKONETA CITY OH0600712 | WAPAKONETA | 11,000 | — | — | Compliant |
| MASON, CITY OF OH8300812 | MASON | 11,000 | — | — | Compliant |
| VAN WERT CITY OH8100611 | VAN WERT | 10,846 | — | — | Compliant |
| VERMILION CITY OH2201511 | VERMILION | 10,569 | — | — | Compliant |
| CAMBRIDGE, CITY OF OH3000111 | CAMBRIDGE | 10,520 | 5.6 | — | Exceeds |
| GALION CITY OH1700211 | GALION | 10,453 | — | — | Compliant |
| CITY OF HEATH PWS OH4500912 | HEATH | 10,310 | — | — | Compliant |
| BUCKEYE WATER DISTRICT - OHIO RIVER OH1502911 | WELLSVILLE | 10,300 | — | — | Compliant |
| LONDON CITY PWS OH4900712 | COLUMBUS | 10,256 | — | — | Compliant |
| HAMILTON/NORTH WATER PLANT OH0901012 | HAMILTON | 10,080 | — | — | Compliant |
| EARNHART HILL WATER DISTRICT PWS OH6500812 | CIRCLEVILLE | 10,057 | — | — | Compliant |
| CLERMONT COUNTY WATER, PUB OH1300412 | BATAVIA | 10,000 | — | — | Compliant |
| CLERMONT COUNTY WATER, MGS OH1300422 | BATAVIA | 10,000 | — | — | Compliant |
| TRUMBULL CO. - SOUTHEAST PWS OH7803203 | VIENNA | 9,931 | 4 | 9.1 | Exceeds |
| PATASKALA CITY OH4502512 | PATASKALA | 9,900 | — | — | Compliant |
| LITTLE HOCKING WATER ASSOCIATION, INC. OH8400212 | LITTLE HOCKING | 9,892 | — | — | Compliant |
| SHELBY WATER DEPARTMENT OH7004514 | SHELBY | 9,800 | — | — | Compliant |
| HUBER HEIGHTS-PLANT #2 OH5702022 | HUBER HEIGHTS | 9,750 | — | — | Compliant |
| WYOMING CITY PWS OH3102212 | CINCINNATI | 9,700 | — | — | Compliant |
| JACKSON, CITY OF OH4000111 | JACKSON | 9,691 | — | — | Compliant |
| NORTHWESTERN W AND SD - OREGON WTLN 200 OH8704203 | BOWLING GREEN | 9,629 | — | — | Compliant |
| OAKWOOD CITY PWS OH5701915 | OAKWOOD | 9,572 | — | — | Compliant |
| READING CITY PWS OH3101812 | READING | 9,506 | — | — | Compliant |
| BELLBROOK WATER WORKS OH2901112 | BELLBROOK | 9,475 | — | 4.2 | Exceeds |
| SHELBY CITY OH7004511 | SHELBY | 9,453 | — | — | Compliant |
| ST MARYS CITY OH0600612 | ST MARYS | 9,356 | — | — | Compliant |
| CANAL WINCHESTER CITY PWS OH2500312 | CANAL WINCHESTER | 9,286 | — | — | Compliant |
| TWIN CITY WATER AND SEWER DISTRICT PWS OH7901711 | DENNISON | 9,224 | — | — | Compliant |
| TIPP CITY CITY PWS OH5501512 | TIPP CITY | 9,221 | — | — | Compliant |
| LOUISVILLE CITY PWS OH7603012 | LOUISVILLE | 9,186 | — | — | Compliant |
| SHEFFIELD LAKE CITY PWS OH4701103 | SHEFFIELD LAKE | 9,108 | — | — | Compliant |
| TROTWOOD CITY PWS OH5702403 | TROTWOOD | 9,000 | — | — | Compliant |
| HUBBARD WATER DEPARTMENT OH7801412 | HUBBARD | 9,000 | — | — | Compliant |
| CHILLICOTHE CORRECTIONAL INSTITUTION OH7101212 | OAK HILL | 9,000 | — | — | Compliant |
| WRIGHT STATE UNIVERSITY OH2902012 | DAYTON | 8,948 | — | — | Compliant |
| GUERNSEY CO. WATER DEPT. OH3000603 | CAMBRIDGE | 8,891 | 9.8 | — | Exceeds |
| CLARK COUNTY NORTHRIDGE PWS OH1201003 | SPRINGFIELD | 8,874 | — | — | Compliant |
| SCIOTO WATER INC.-ROSE HILL OH7300303 | FRANKLIN FURNACE | 8,861 | — | — | Compliant |
| NAPOLEON CITY OH3500811 | NAPOLEON | 8,858 | — | — | Compliant |
| BRYAN CITY OH8600012 | BRYAN | 8,729 | — | — | Compliant |
| PORTAGE COUNTY WATER RESOURCES OH6702812 | RAVENNA | 8,606 | — | — | Compliant |
| SUPT,KENTON WATER DEPARTMENT OH3300614 | KENTON | 8,605 | — | — | Compliant |
| OBERLIN WATER DEPARTMENT OH4700911 | LAGRANGE | 8,600 | — | — | Compliant |
| SANITARY DISTRICT #4 OH2501003 | COLUMBUS | 8,575 | 7.2 | — | Exceeds |
| LEBANON, CITY OF-PLANT 1 OH8300712 | LEBANON | 8,500 | — | — | Compliant |
| ORRVILLE CITY PWS OH8502712 | NAVARRE | 8,452 | — | — | Compliant |
| EATON PUBLIC WATER SYSTEM OH6801612 | W. ALEXANDRIA | 8,400 | — | — | Compliant |
| HUDSON CITY PWS OH7701612 | HUDSON | 8,385 | — | — | Compliant |
| KENTON CITY OH3300612 | KENTON | 8,360 | — | — | Compliant |
| HUBBARD CITY PWS OH7801415 | HUBBARD | 8,339 | — | — | Compliant |
| AQUA OHIO - CAMPBELL PWS OH5000411 | STRUTHERS | 8,300 | — | — | Compliant |
| TRUMBULL CO. - BAZETTA/CHAMPION OH7804303 | VIENNA | 8,270 | — | — | Compliant |
| BELLEVUE CITY OH3900011 | BELLEVUE | 8,236 | — | — | Compliant |
| AQUA OHIO - LAWRENCE COUNTY OH4400803 | WESTERVILLE | 8,130 | 4.2 | — | Exceeds |
| GREENE COUNTY S. BEAVERCREEK OH2902112 | BEAVERCREEK | 8,024 | — | — | Compliant |
| JACKSON CO. WATER COMPANY-E PWS OH4001203 | JACKSON | 7,846 | — | — | Compliant |
| BUCKEYE WATER DISTRICT OH1565812 | WELLSVILLE | 7,775 | — | — | Compliant |
| CANFIELD CITY PWS OH5000503 | CANFIELD | 7,767 | 4.2 | 12.4 | Exceeds |
| KNOX COUNTY WATER AND WASTEWATER PWS OH4202012 | MOUNT VERNON | 7,710 | — | — | Compliant |
| HDMA - BENTON RD PWS OH8035512 | MARYSVILLE | 7,600 | — | — | Compliant |
| WAUSEON CITY OH2600111 | WAUSEON | 7,568 | — | — | Compliant |
| WELLSTON, CITY OF-NORTH OH4000511 | WELLSTON | 7,542 | — | — | Compliant |
| EATON, CITY OF OH6800412 | EATON | 7,500 | — | — | Compliant |
| WARREN COMM W AND S ASSN 2 OH8402703 | MARIETTA | 7,215 | 20 | — | Exceeds |
| GALLIPOLIS PWS OH2700112 | GALLIPOLIS | 7,134 | 7.2 | — | Exceeds |
| CORTLAND CITY PWS OH7800512 | CORTLAND | 7,105 | — | — | Compliant |
| DELPHOS CITY OH0200412 | DELPHOS | 7,101 | — | — | Compliant |
| AQUA OHIO - BLACKLICK OH2502412 | WESTERVILLE | 7,100 | — | — | Compliant |
| WILLARD CITY OH3901511 | WILLARD | 7,099 | — | — | Compliant |
| THE DISTILLATA COMPANY PA9996128 | CLEVELAND | 7,000 | — | — | Compliant |
| WELLSTON CITY PWS OH4001912 | WELLSTON | 7,000 | — | — | Compliant |
| UNION CITY PWS OH5702512 | UNION | 7,000 | 4.8 | — | Exceeds |
| MARTINS FERRY PUBLIC WATER SYSTEM OH0701212 | MARTINS FERRY | 6,980 | 6.1 | — | Exceeds |
| AQUA OHIO - HUBER RIDGE PWS OH2502512 | WESTERVILLE | 6,950 | — | — | Compliant |
| HURON CITY OH2201011 | HURON | 6,893 | — | — | Compliant |
| COLUMBIANA CITY PWS OH1500312 | COLUMBIANA | 6,727 | — | — | Compliant |
| LOGAN, CITY OF OH3700612 | LOGAN | 6,704 | — | — | Compliant |
| MILFORD CITY PWS OH1301012 | MILFORD | 6,700 | 4.1 | 7.8 | Exceeds |
| UPPER SANDUSKY CITY OH8800511 | UPPER SANDUSKY | 6,698 | — | — | Compliant |
| STARK COUNTY WATER DISTRICT OH7607303 | CANTON | 6,690 | — | — | Compliant |
| I-71 AND SR-35 PWS OH2437412 | WASHINGTON COURT HOUSE | 6,685 | — | — | Compliant |
| LEADING CREEK CONSERVANCY DISTRICT OH5300012 | RUTLAND | 6,663 | 7.6 | — | Exceeds |
| NELSONVILLE PWS OH0501214 | NELSONVILLE | 6,656 | — | — | Compliant |
| ONTARIO CITY OH7003512 | ONTARIO | 6,656 | — | — | Compliant |
| HILLSBORO CITY OH3600614 | HILLSBORO | 6,650 | — | — | Compliant |
| MOUNT ORAB VILLAGE PWS OH0801011 | MOUNT ORAB | 6,607 | — | — | Compliant |
| TCMSD-WILKSHIRE HILLS PWS OH7901612 | BOLIVAR | 6,587 | — | — | Compliant |
| SOUTH LEBANON CITY PWS OH8301312 | SOUTH LEBANON | 6,541 | — | — | Compliant |
| MAYSVILLE REGIONAL WATER OH6001411 | WHITE COTTAGE | 6,540 | 4 | — | At risk |
| WATERVILLE CITY OH4801503 | WATERVILLE | 6,500 | — | — | Compliant |
| BARNESVILLE OH0700011 | BARNESVILLE | 6,500 | 8.1 | — | Exceeds |
| RITTMAN CITY PWS OH8503012 | RITTMAN | 6,491 | — | — | Compliant |
| SCIOTO WATER INC.-SUGAR CAMP OH7300903 | FRANKLIN FURNACE | 6,458 | — | — | Compliant |
| BELPRE CITY PWS OH8400012 | BELPRE | 6,441 | — | — | Compliant |
| NORTHERN OHIO RURAL WATER - NW DISTRICT OH2201803 | NORWALK | 6,409 | — | — | Compliant |
| TRUMBULL CO. - HOWLAND TWP PWS OH7806303 | VIENNA | 6,396 | 4.4 | 13 | Exceeds |
| ROOTSTOWN WATER COMPANY OH6703503 | RAVENNA | 6,378 | — | — | Compliant |
| CLYDE CITY OH7200211 | CLYDE | 6,325 | — | — | Compliant |
| TRUMBULL CO.-CHAMPION OH7803303 | WARREN | 6,237 | — | — | Compliant |
| NEWTON FALLS CITY OH7802311 | NEWTON FALLS | 6,109 | 6.7 | 5.6 | Exceeds |
| SEBRING VILLAGE PWS OH5001911 | SEBRING | 6,058 | — | — | Compliant |
| PORT CLINTON CITY OH6203211 | PORT CLINTON | 6,056 | — | — | Compliant |
| ANDOVER-CAMPLANDS WATER OH0400212 | ANDOVER | 6,009 | — | — | Compliant |
| CLEVES VILLAGE PWS OH3100512 | CLEVES | 6,000 | — | — | Compliant |
| GRANVILLE, VILLAGE OF OH4500612 | GRANVILLE | 5,946 | — | — | Compliant |
| GENEVA CITY PWS OH0401712 | GENEVA | 5,924 | — | — | Compliant |
| BROOKVILLE MUNICIPALITY PWS OH5700203 | BROOKVILLE | 5,923 | — | — | Compliant |
| JEFFERSON CO,SD 1,EMPIRE OH4100712 | STEUBENVILLE | 5,800 | — | — | Compliant |
| NEW CARLISLE CITY PWS OH1203312 | NEW CARLISLE | 5,800 | — | — | Compliant |
| GERMANTOWN CITY PWS OH5701012 | GERMANTOWN | 5,796 | — | — | Compliant |
| TORONTO PWS OH4102811 | TORONTO | 5,676 | — | — | Compliant |
| LAWRENCE WATER CORP. OH4402003 | SCOTTOWN | 5,600 | — | — | Compliant |
| ARCHBOLD VILLAGE OH2600011 | ARCHBOLD | 5,586 | — | — | Compliant |
| SUMMIT CO,HUDSON SERVICE OH7706203 | CUYAHOGA FALLS | 5,563 | — | — | Compliant |
| SUNDAY CREEK VALLEY WATER PWS OH0501503 | MILLFIELD | 5,451 | — | — | Compliant |
| PORTAGE COUNTY WATER RESOURC - BRIMFIELD OH6706012 | RAVENNA | 5,346 | — | — | Compliant |
| ADA VILLAGE OH3300012 | ADA | 5,334 | — | — | Compliant |
| CANAL FULTON CITY PWS OH7600912 | CANAL FULTON | 5,323 | — | — | Compliant |
| CHARDON CITY PWS OH2800412 | CHARDON | 5,247 | — | — | Compliant |
| NORTHERN OHIO RURAL WATER-SOUTH DISTRICT OH3946712 | NORWALK | 5,226 | — | — | Compliant |
| SUPT,CHAGRIN FALLS WATER DEPT. OH1801412 | CHAGRIN FALLS | 5,200 | — | — | Compliant |
| JOHNSTOWN CITY PWS OH4501512 | JOHNSTOWN | 5,200 | — | — | Compliant |
| WHITEHOUSE VILLAGE OH4801612 | WHITEHOUSE | 5,200 | — | — | Compliant |
| SUPT,CHAGRIN FALLS WATER DEPT. OH1800214 | CHAGRIN FALLS | 5,200 | — | — | Compliant |
| MID-OHIO WSD WATER DISTRICT 1 OH4901012 | COLUMBUS | 5,176 | — | — | Compliant |
| NEW LEXINGTON OH6400411 | NEW LEXINGTON | 5,161 | — | — | Compliant |
| ERIE CO MARGARETTA DISTRICT OH2200203 | HURON | 5,131 | — | — | Compliant |
| BYESVILLE OH3001212 | BYESVILLE | 5,104 | — | — | Compliant |
| ST. CLAIRSVILLE, CITY OF PWS OH0701516 | ST. CLAIRSVILLE | 5,097 | 6.4 | — | Exceeds |
| MUNROE FALLS CITY PWS OH7702703 | MUNROE FALLS | 5,042 | — | — | Compliant |
| CHAGRIN FALLS VILLAGE PWS OH1800212 | CHAGRIN FALLS | 4,991 | — | — | Compliant |
| WEST MILTON VILLAGE PWS OH5501711 | WEST MILTON | 4,890 | — | — | Compliant |
| OTTAWA VILLAGE OH6900711 | OTTAWA | 4,863 | — | — | Compliant |
| WELLINGTON VILLAGE PWS OH4701511 | WELLINGTON | 4,802 | — | — | Compliant |
| GREENE COUNTY EASTERN REGIONAL PWS OH2906103 | BEAVERCREEK | 4,800 | — | — | Compliant |
| NORTHWESTERN W AND SD - PORTAGE OH8704103 | BOWLING GREEN | 4,776 | — | — | Compliant |
| COLDWATER VILLAGE OH5400112 | COLDWATER | 4,774 | — | — | Compliant |
| EAST PALESTINE VILLAGE PWS OH1500912 | EAST PALESTINE | 4,761 | — | — | Compliant |
| JEFFERSON REGIONAL WATER AUTHORITY OH5703012 | MIAMISBURG | 4,750 | — | — | Compliant |
| MEDINA CO/SOUTHERN WATER DIST PWS OH5260712 | COLUMBIA STATION | 4,708 | — | — | Compliant |
| GUERNSEY CO.SAN.DISTRICT NO.6 OH3000612 | CAMBRIDGE | 4,640 | — | — | Compliant |
| CRESTLINE VILLAGE OH1700112 | CRESTLINE | 4,630 | — | — | Compliant |
| OAK HARBOR VILLAGE OH6202603 | OAK HARBOR | 4,615 | — | — | Compliant |
| GREENFIELD VILLAGE PWS OH3600312 | GREENFIELD | 4,600 | — | — | Compliant |
| WEST JEFFERSON VILLAGE PWS OH4902012 | WEST JEFFERSON | 4,488 | — | — | Compliant |
| MID-OHIO WSD PLAIN CITY WTP OH4901112 | COLUMBUS | 4,467 | — | — | Compliant |
| WAVERLY CITY PWS OH6600912 | WAVERLY | 4,433 | — | — | Compliant |
| TRUMBULL CO-FOUR TWP.WAT.DIST. OH7803403 | WARREN | 4,384 | — | — | Compliant |
| MONROE WATER SYSTEMS OH5600812 | LAINGS | 4,334 | — | — | Compliant |
| LEXINGTON VILLAGE OH7002212 | LEXINGTON | 4,320 | — | — | Compliant |
| WATERVILLE WATER DEPARTMENT OH4801511 | WATERVILLE | 4,300 | — | — | Compliant |
| ASHVILLE VILLAGE PWS OH6500012 | ASHVILLE | 4,298 | — | — | Compliant |
| MONTPELIER VILLAGE OH8600912 | MONTPELIER | 4,280 | — | — | Compliant |
| BELLAIRE PUBLIC WATER SYSTEM OH0700114 | BELLAIRE | 4,278 | — | — | Compliant |
| GEORGETOWN VILLAGE PWS OH0800503 | GEORGETOWN | 4,243 | 4.7 | — | Exceeds |
| BLANCHESTER VILLAGE PWS OH1400111 | FAYETTEVILLE | 4,243 | — | — | Compliant |
| BROWN CO.RURAL WATER ASSN-WEST OH0800303 | GEORGETOWN | 4,235 | — | — | Compliant |
| CLARK COUNTY PARK LAYNE PWS OH1201112 | SPRINGFIELD | 4,221 | — | — | Compliant |
| SHEFFIELD VILLAGE PWS OH4701203 | SHEFFIELD VILLAGE | 4,165 | — | — | Compliant |
| SOUTH POINT VILLAGE OH4401212 | SOUTH POINT | 4,133 | — | — | Compliant |
| BLUFFTON VILLAGE OH0200112 | BLUFFTON | 4,125 | — | — | Compliant |
| WARREN CO. FRANKLIN/LEBANON PWS OH8301712 | LEBANON | 4,125 | — | — | Compliant |
| WAYNESVILLE VILLAGE PWS OH8302012 | WAYNESVILLE | 4,100 | — | — | Compliant |
| SOUTHERN PERRY CO-CONGO OH6401603 | CORNING | 4,029 | — | — | Compliant |
| AQUA OHIO - MASURY OH7802711 | STRUTHERS | 4,016 | — | — | Compliant |
| SUPT-WALBRIDGE WATER DEPT. OH8702803 | WALBRIDGE | 4,000 | — | — | Compliant |
| MINERVA VILLAGE PWS OH7603812 | MINERVA | 4,000 | — | — | Compliant |
| CLINTON COUNTY RURAL WATER CO. OH1401303 | WILMINGTON | 4,000 | — | — | Compliant |
| OAK HARBOR WATER DEPARTMENT OH6202615 | OAK HARBOR | 4,000 | — | — | Compliant |
| CEDARVILLE UNIVERSITY OH2903612 | CEDARVILLE | 4,000 | — | — | Compliant |
| NEW LEBANON VILLAGE PWS OH5701812 | NEW LEBANON | 3,995 | — | — | Compliant |
| EATON, CITY OF-BLACK PLT. OH6800422 | EATON | 3,975 | — | — | Compliant |
| WINTERSVILLE VILLAGE PWS OH4103003 | WINTERSVILLE | 3,924 | — | — | Compliant |
| BETHEL VILLAGE PWS OH1300116 | BETHEL | 3,900 | 7.9 | — | Exceeds |
| NEWCOMERSTOWN VILLAGE PWS OH7900912 | NEWCOMERSTOWN | 3,882 | — | — | Compliant |
| SWANTON VILLAGE OH2601011 | SWANTON | 3,855 | — | — | Compliant |
| ELIDA VILLAGE OH0200503 | ELIDA | 3,848 | — | — | Compliant |
| YELLOW SPRINGS VILLAGE PWS OH2903012 | YELLOW SPRINGS | 3,761 | — | 9.2 | Exceeds |
| MIAMI CO-CAMP TROY PWS OH5502503 | TROY | 3,742 | — | — | Compliant |
| JACKSON/MILTON METRO WATER DISTRICT PWS OH5054212 | YOUNGSTOWN | 3,728 | — | 7.9 | Exceeds |
| SHADYSIDE PUBLIC WATER SYSTEM OH0701612 | BARNESVILLE | 3,689 | 6 | — | Exceeds |
| CAREY VILLAGE PWS OH8800012 | CAREY | 3,674 | — | — | Compliant |
| WEST UNION PUBLIC WATER SYSTEM OH0100503 | WEST UNION | 3,670 | — | — | Compliant |
| NORTHWESTERN W AND SD - WESTON OH8703211 | BOWLING GREEN | 3,648 | — | — | Compliant |
| NORTHWESTERN W AND SD - MIDDLETON TWP OH8752212 | BOWLING GREEN | 3,615 | — | — | Compliant |
| PAULDING VILLAGE OH6300411 | PAULDING | 3,605 | — | — | Compliant |
| HICKSVILLE VILLAGE OH2000212 | HICKSVILLE | 3,600 | — | — | Compliant |
| AQUA OHIO - LAKE DARBY OH2502612 | WESTERVILLE | 3,562 | — | — | Compliant |
| DELTA VILLAGE OH2600311 | DELTA | 3,518 | — | — | Compliant |
| LORDSTOWN VILLAGE PWS OH7804403 | LORDSTOWN | 3,515 | — | 16 | Exceeds |
| MT GILEAD VILLAGE PWS OH5900712 | MT GILEAD | 3,503 | — | — | Compliant |
| HONDA DMA EAST LIBERTY WTP OH4643512 | MARYSVILLE | 3,500 | — | — | Compliant |
| COMMERCIAL POINT VILLAGE OH6503512 | COMMERCIAL POINT | 3,497 | — | — | Compliant |
| LOCKLAND VILLAGE PWS OH3101212 | LOCKLAND | 3,486 | — | — | Compliant |
| MGR,OHIO WATER SER.CO,JEFFERSN OH0400911 | GENEVA | 3,477 | — | — | Compliant |
| GEORGETOWN WATER DEPARTMENT PWS OH0800511 | GEORGETOWN | 3,467 | — | — | Compliant |
| NORTH BALTIMORE VILLAGE OH8701611 | NORTH BALTIMORE | 3,432 | — | — | Compliant |
| LICKING COUNTY HARBOR HILLS PWS OH4500812 | BUCKEYE LAKE | 3,415 | — | — | Compliant |
| LEBANON CORRECTIONAL INSTITUTION OH8301012 | LEBANON | 3,410 | — | — | Compliant |
| HONDA DMA ANNA ENGINE PLANT OH7537812 | ANNA | 3,400 | — | — | Compliant |
| ODRC-PICKAWAY CORRECTION PWS OH6501712 | FREDRICKTOWN | 3,376 | — | — | Compliant |
| MORROW VILLAGE PWS OH8300912 | MORROW | 3,360 | — | — | Compliant |
| CADIZ VILLAGE PWS OH3400214 | CADIZ | 3,353 | — | — | Compliant |
| MINGO JUNCTION PWS OH4101612 | MINGO JUNCTION | 3,350 | — | — | Compliant |
| CALDWELL VILLAGE PWS OH6100011 | CALDWELL | 3,300 | 13 | — | Exceeds |
| ATHENS CO., THE PLAINS S.D. 1 PWS OH0500303 | MILLFIELD | 3,276 | — | — | Compliant |
| NEW LONDON VILLAGE PWS OH3902611 | NEW LONDON | 3,250 | — | — | Compliant |
| NEW LONDON VILLAGE PLANT 1 OH3900911 | NEW LONDON | 3,250 | — | — | Compliant |
| GROVEPORT PWS OH2501512 | GROVEPORT | 3,229 | — | — | Compliant |
| AQUA OHIO - VILLAGE OF JEFFERSON OH0401812 | ASHTABULA | 3,226 | — | — | Compliant |
| WESTERN GUERNSEY REGIONAL WATER DISTRICT OH3001103 | CAMBRIDGE | 3,225 | — | — | Compliant |
| GREENE COUNTY - CEDARVILLE OH2900311 | BEAVERCREEK | 3,210 | — | — | Compliant |
| MADISON VILLAGE PWS OH4300903 | MADISON | 3,200 | — | — | Compliant |
| MILLERSPORT VILLAGE PWS OH2301212 | MILLERSPORT | 3,200 | — | — | Compliant |
| NEW MIAMI VILLAGE PWS OH0902112 | NEW MIAMI | 3,200 | — | — | Compliant |
| FAIRPORT HARBOR VILLAGE PWS OH4300411 | FAIRPORT HARBOR | 3,180 | — | — | Compliant |
| MCDONALD VILLAGE PWS OH7802003 | MCDONALD | 3,172 | — | 21.2 | Exceeds |
| JACKSON CO. WATER - K PWS OH4001403 | JACKSON | 3,167 | — | — | Compliant |
| OBETZ VILLAGE PWS OH2502212 | OBETZ | 3,167 | — | — | Compliant |
| MILLERSBURG VILLAGE PWS OH3800912 | MILLERSBURG | 3,151 | — | — | Compliant |
| BUTLER COUNTY PORT UNION PWS OH0903403 | HAMILTON | 3,136 | — | — | Compliant |
| KELLEYS ISLAND VILLAGE OH2201111 | KELLEYS ISLAND | 3,125 | — | — | Compliant |
| GENOA VILLAGE OH6201003 | GENOA | 3,110 | — | — | Compliant |
| LAKEMORE VILLAGE PWS OH7701812 | LAKEMORE | 3,068 | — | — | Compliant |
| OAK HILL, VILLAGE OF OH4000411 | OAK HILL | 3,067 | — | — | Compliant |
| Sunbury Village PWS OH2101111 | SUNBURY | 3,060 | — | — | Compliant |
| CARROLLTON VILLAGE OH1000012 | CARROLLTON | 3,055 | — | — | Compliant |
| DOYLESTOWN VILLAGE PWS OH8500612 | DOYLESTOWN | 3,051 | — | — | Compliant |
| NEW BREMEN VILLAGE OH0600512 | NEW BREMEN | 3,034 | — | — | Compliant |
| JEFFERSON CO W AND S DISTRICT- A OH4100803 | STEUBENVILLE | 3,028 | — | — | Compliant |
| MINSTER VILLAGE OH0600412 | MINSTER | 3,025 | — | — | Compliant |
| HIGHLAND RIDGE W AND S ASSOCIATION INC OH8403203 | LOWELL | 3,022 | — | — | Compliant |
| CLARK COUNTY GREEN MEADOWS 2 PWS OH1200703 | SPRINGFIELD | 3,008 | — | — | Compliant |
| GEAUGA COUNTY-BAINBRIDGE OH2804003 | CHARDON | 3,000 | — | — | Compliant |
| TRI-COUNTY RURAL W AND S DISTRICT OH8403112 | WATERFORD | 3,000 | — | — | Compliant |
| MGR,J.W.SMITH WATER SERVICE OH1301603 | GOSHEN | 3,000 | — | — | Compliant |
| FRANKLIN CO,HAMILTON MEADOWS OH2500912 | COLUMBUS | 3,000 | — | — | Compliant |
| BALTIMORE VILLAGE PWS OH2300112 | BALTIMORE | 2,995 | — | — | Compliant |
| LAKENGREN WATER AUTHORITY OH6800712 | EATON | 2,950 | — | — | Compliant |
| OLD STRAITSVILLE WATER ASSOCIATION OH6401403 | LOGAN | 2,950 | — | — | Compliant |
| LODI VILLAGE PWS OH5200412 | LODI | 2,884 | — | — | Compliant |
| TRUMBULL CO. - MINERAL RIDGE PWS OH7803503 | VIENNA | 2,858 | — | — | Compliant |
| BRIDGEPORT PUBLIC WATER SYSTEM OH0700612 | BRIDGEPORT | 2,830 | — | — | Compliant |
| LISBON VILLAGE OH1501512 | WARREN | 2,821 | — | — | Compliant |
| TRUMBULL CO-MOSQUITO CREEK SD OH7803603 | WARREN | 2,808 | — | — | Compliant |
| SOUTH ZANESVILLE PWS OH6002212 | ZANESVILLE | 2,800 | — | — | Compliant |
| GRAFTON VILLAGE PWS OH4700511 | GRAFTON | 2,769 | — | — | Compliant |
| WARREN COMM.WATER&SEWER ASS.#1 OH8401003 | MARIETTA | 2,750 | — | — | Compliant |
| MIDDLEFIELD VILLAGE PWS OH2802012 | MIDDLEFIELD | 2,748 | — | — | Compliant |
| BUCKEYE LAKE, VILLAGE OF PWS OH4564712 | BUCKEYE LAKE | 2,746 | — | — | Compliant |
| PUTNAM COMMUNITY WATER ASSOCIATION PWS OH8400712 | MARIETTA | 2,744 | 16.9 | — | Exceeds |
| COVINGTON VILLAGE PWS OH5500112 | COVINGTON | 2,718 | — | — | Compliant |
| REMINDERVILLE, VILLAGE O OH6705012 | AURORA | 2,700 | — | — | Compliant |
| OH/CR STATE REFORMATORY OH7003412 | MANSFIELD | 2,700 | — | — | Compliant |
| SUPT,ELIDA WATER DEPARTMENT OH0200512 | ELIDA | 2,700 | — | — | Compliant |
| SUPT.SHAKER ESTATES SAN.DIST. OH2900903 | XENIA | 2,700 | — | — | Compliant |
| NEW RICHMOND VILLAGE PWS OH1301212 | NEW RICHMOND | 2,698 | — | — | Compliant |
| VERSAILLES VILLAGE PWS OH1901312 | VERSAILLES | 2,687 | — | — | Compliant |
| SUMMIT CO-COUNTRY CLUB Y OH7704412 | AKRON | 2,680 | — | — | Compliant |
| CLEAR WATER CORPORATION OH6100103 | SARAHSVILLE | 2,670 | — | — | Compliant |
| FREDERICKTOWN VILLAGE OH4200212 | FREDERICKTOWN | 2,648 | — | — | Compliant |
| LOUDONVILLE VILLAGE OH0301012 | LOUDONVILLE | 2,641 | — | — | Compliant |
| STRASBURG VILLAGE PWS OH7901212 | STRASBURG | 2,610 | — | — | Compliant |
| WOODSFIELD VILLAGE PWS OH5600711 | WOODSFIELD | 2,598 | — | — | Compliant |
| ST HENRY VILLAGE OH5401312 | ST HENRY | 2,596 | — | — | Compliant |
| GREENE COUNTY SHAWNEE HILLS OH2902312 | BEAVERCREEK | 2,547 | — | — | Compliant |
| CROOKSVILLE OH6400111 | CROOKSVILLE | 2,534 | — | — | Compliant |
| SILVER LAKE VILLAGE PWS OH7704303 | SILVER LAKE | 2,519 | — | — | Compliant |
| GIBSONBURG VILLAGE OH7200412 | GIBSONBURG | 2,506 | — | — | Compliant |
| GAMBIER VILLAGE PWS OH4200403 | GAMBIER | 2,502 | — | — | Compliant |
| MADISON WATER DEPARTMENT OH4300914 | MADISON | 2,500 | — | — | Compliant |
| AQUA OHIO - WORTHINGTON HILLS PWS OH2502812 | WESTERVILLE | 2,500 | — | — | Compliant |
| HARRISON TWP WATER CORP. OH3100903 | HARRISON | 2,500 | — | — | Compliant |
| GLENDALE VILLAGE PWS OH3100712 | GLENDALE | 2,500 | — | — | Compliant |
| SWITZERLAND OF OHIO WATER OH5600503 | JERUSALEM | 2,500 | — | — | Compliant |
| SABINA VILLAGE PWS OH1400912 | SABINA | 2,493 | — | — | Compliant |
| NEW CONCORD PWS OH6001711 | NEW CONCORD | 2,491 | — | — | Compliant |
| WILLIAMSBURG VILLAGE PWS OH1301411 | WILLIAMSBURG | 2,490 | — | — | Compliant |
| MIDDLEPORT VILLAGE PWS OH5300112 | MIDDLEPORT | 2,446 | — | — | Compliant |
| WAYNOKA REGIONAL WATER AND SEWER DIST OH0800811 | SARDINIA | 2,428 | — | — | Compliant |
| ENON VILLAGE PWS OH1201812 | ENON | 2,415 | — | — | Compliant |
| CRIDERSVILLE VILLAGE OH0600212 | CRIDERVILLE | 2,410 | — | — | Compliant |
| LAGRANGE VILLAGE PWS OH4700603 | LAGRANGE | 2,400 | — | — | Compliant |
| MCARTHUR VILLAGE PWS OH8200212 | MCARTHUR | 2,400 | — | — | Compliant |
| AQUA OHIO - MOHAWK PWS OH1000812 | MASSILLON | 2,376 | — | — | Compliant |
| TRI-COUNTY WATER AUTHORITY OH3401403 | HARRISVILLE | 2,370 | — | — | Compliant |
| NOBLE COUNTY WATER AUTHORITY PWS OH6100503 | BELLE VALLEY | 2,368 | — | — | Compliant |
| HEBRON VILLAGE PWS OH4501012 | HEBRON | 2,368 | — | — | Compliant |
| MIAMI CO-N25A EXTENSION OH5502303 | TROY | 2,367 | — | — | Compliant |
| LEIPSIC VILLAGE OH6900612 | LEIPSIC | 2,348 | — | — | Compliant |
| PORTERSVILLE EAST BRANCH WATER CO. OH6402303 | MALTA | 2,340 | — | — | Compliant |
| CLARK COUNTY GREEN MEADOWS 1 PWS OH1200603 | SPRINGFIELD | 2,327 | — | — | Compliant |
| GARRETTSVILLE VILLAGE PWS OH6701412 | GARRETTSVILLE | 2,325 | — | — | Compliant |
| WEST LAFAYETTE PWS OH1600712 | WEST LAFAYETTE | 2,321 | — | — | Compliant |
| RICHWOOD VILLAGE PWS OH8000412 | RICHWOOD | 2,316 | — | — | Compliant |
| MGR.BROWN CO RURAL WATER ASSN OH0800103 | GEORGETOWN | 2,310 | — | — | Compliant |
| LAKESIDE ASSOCIATION PWS OH6202011 | LAKESIDE | 2,300 | — | — | Compliant |
| SEVILLE VILLAGE PWS OH5201412 | SEVILLE | 2,296 | — | — | Compliant |
| CARROLL WATER AND SEWER OH6205111 | OAK HARBER | 2,288 | — | — | Compliant |
| SPENCERVILLE VILLAGE OH0201312 | SPENCERVILLE | 2,261 | — | — | Compliant |
| UTICA VILLAGE PWS OH4503012 | UTICA | 2,235 | — | — | Compliant |
| SUGARCREEK VILLAGE PWS OH7901312 | SUGARCREEK | 2,220 | — | — | Compliant |
| SUPT,LEETONIA WATER DEPARTMENT OH1501414 | LEETONIA | 2,200 | — | — | Compliant |
| SUPT,GENOA WATER DEPARTMENT OH6201012 | GENOA | 2,200 | — | — | Compliant |
| CHOCTAW UTILITIES, INC. OH4900212 | LONDON | 2,200 | — | — | Compliant |
| COLUMBIA PARK WATER SYSTEM OH1841012 | OLMSTED TWP | 2,199 | — | — | Compliant |
| RENO WATER AND SEWER 1 OH8402503 | MARIETTA | 2,189 | — | — | Compliant |
| PIKETON VILLAGE PWS OH6600712 | PIKETON | 2,181 | — | — | Compliant |
| SCIOTO WATER INC.-MORRIS LANE OH7302603 | FRANKLIN FURNACE | 2,178 | — | — | Compliant |
| CRESTON VILLAGE OH8500312 | CRESTON | 2,171 | — | — | Compliant |
| COAL GROVE OH4400012 | SOUTHPOINT | 2,167 | — | — | Compliant |
| AQUA OHIO - MIDVALE OH7900612 | MASSILLON | 2,147 | — | — | Compliant |
| COLUMBUS GROVE VILLAGE OH6900112 | COLUMBUS GROVE | 2,137 | — | — | Compliant |
| BREWSTER VILLAGE PWS OH7600512 | BREWSTER | 2,113 | — | — | Compliant |
| ARCANUM VILLAGE PWS OH1900112 | ARCANUM | 2,100 | — | — | Compliant |
| CENTRAL STATE UNIVERSITY OH2901912 | XENIA | 2,100 | — | — | Compliant |
| SWITZERLAND OF OHIO WATER DIST OH5600511 | JERUSALEM | 2,100 | — | — | Compliant |
| SAINT PARIS VILLAGE PWS OH1100912 | PIQUA | 2,089 | — | — | Compliant |
| CARDINGTON VILLAGE PWS OH5900112 | CARDINGTON | 2,079 | — | — | Compliant |
| MOUNT STERLING VILLAGE PWS OH4900812 | MOUNT STERLING | 2,059 | — | — | Compliant |
| MADISON WATER DISTRICT OH7006712 | MANSFIELD | 2,050 | — | — | Compliant |
| CAMDEN, VILLAGE OF OH6800112 | CAMDEN | 2,050 | — | — | Compliant |
| MANCHESTER VILLAGE OH0100112 | MANCHESTER | 2,043 | — | — | Compliant |
| WOODVILLE VILLAGE OH7200912 | WOODVILLE | 2,006 | — | — | Compliant |
| DRESDEN PWS OH6000212 | DRESDEN | 2,000 | — | — | Compliant |
| SUPT,PLYMOUTH WATER DEPARTMENT OH7004012 | PLYMOUTH | 2,000 | — | — | Compliant |
| GEM BEACH UTILITY CO OH6200811 | PORT CLINTON | 2,000 | — | — | Compliant |
| BRADFORD VILLAGE PWS OH1900212 | BRADFORD | 2,000 | — | — | Compliant |
| MGR,KENYON COLLEGE WATER SUPLY OH4200412 | GAMBIER | 2,000 | — | — | Compliant |
| BYESVILLE, VLG. OF-PLT 1 OH3000012 | BYESVILLE | 2,000 | — | — | Compliant |
| BYESVILLE, VLG. OF-PLT 2 OH3000022 | BYESVILLE | 2,000 | — | — | Compliant |
| DALTON VILLAGE PWS OH8500412 | DALTON | 2,000 | — | — | Compliant |
| BRILLIANT WATER AND SEWER OH4100412 | BRILLIANT | 2,000 | — | — | Compliant |
| SOUTH BLOOMFIELD VILLAGE PWS OH6502112 | SOUTH BLOOMFIELD | 1,999 | — | — | Compliant |
| JAMESTOWN VILLAGE PWS OH2901712 | JAMESTOWN | 1,997 | — | — | Compliant |
| BURR OAK REGIONAL WATER DISTRICT OH0501311 | MILLFIELD | 1,994 | — | — | Compliant |
| PURE WATER CORPORATION OH6100303 | CALDWELL | 1,989 | — | — | Compliant |
| NEW MIDDLETOWN, VLG. OF OH5002412 | NEW MIDDLETOWN | 1,980 | — | — | Compliant |
| PEEBLES PUBLIC WATER SYSTEM OH0100203 | PEEBLES | 1,978 | — | — | Compliant |
| SCIOTO WATER, INC.-FRANKLIN FURNACE OH7301103 | WHEELERSBURG | 1,974 | — | — | Compliant |
| NAVARRE VILLAGE PWS OH7604112 | NAVARRE | 1,957 | — | — | Compliant |
| OHIO CR,SO.OHIO CORR.FACILITY OH7300712 | LUCASVILLE | 1,950 | — | — | Compliant |
| FRANKLIN CO,RIDGEWOOD ESTATES OH2501112 | COLUMBUS | 1,925 | — | — | Compliant |
| BELLVILLE VILLAGE OH7000012 | BELLVILLE | 1,918 | — | — | Compliant |
| BEVERLY VILLAGE PWS OH8400112 | WATERFORD | 1,900 | — | — | Compliant |
| MAHONING CO.-CRAIG BEACH OH5001112 | Youngstown | 1,900 | — | — | Compliant |
| BERLIN WATER COMPANY OH3800012 | BERLIN | 1,896 | — | — | Compliant |
| EDGERTON VILLAGE OH8600312 | EDGERTON | 1,881 | — | — | Compliant |
| PLYMOUTH VILLAGE OH7004003 | PLYMOUTH | 1,874 | — | — | Compliant |
| ROSEVILLE PWS OH6002112 | ROSEVILLE | 1,852 | — | — | Compliant |
| GRANDVIEW MEDICAL CENTER PWS OH5750615 | DAYTON | 1,850 | — | 7.1 | Exceeds |
| NORTH LEWISBURG VILLAGE PWS OH1100812 | NORTH LEWISBURG | 1,850 | — | — | Compliant |
| LEETONIA VILLAGE PWS OH1501412 | NEW WATERFORD | 1,833 | — | — | Compliant |
| NORTHERN PERRY CO.WATER #2 OH6402703 | NEW LEXINGTON | 1,802 | — | — | Compliant |
| MORCO WATER COMPANY,INC OH5901103 | MARENGO | 1,800 | — | — | Compliant |
| WEST LIBERTY VILLAGE PWS OH4602412 | WEST LIBERTY | 1,800 | — | — | Compliant |
| LEWISBURG VILLAGE PWS OH6800812 | LEWISBURG | 1,800 | — | — | Compliant |
| POMEROY VILLAGE PWS OH5300212 | POMEROY | 1,800 | — | — | Compliant |
| TANGLEWOOD LAKE WATER CO OH2802512 | CHAGRIN FALLS | 1,800 | — | — | Compliant |
| RIPLEY VILLAGE PWS OH0801112 | RIPLEY | 1,780 | — | — | Compliant |
| MCCONNELSVILLE VILLAGE OH5800512 | MCONNELSVILLE | 1,780 | — | — | Compliant |
| WINDHAM VILLAGE PWS OH6704812 | WINDHAM | 1,777 | — | — | Compliant |
| CENTERBURG VILLAGE PWS OH4200012 | CENTERBURG | 1,776 | — | — | Compliant |
| ROAMING SHORES VILLAGE PWS OH0400611 | ROAMING SHORES | 1,764 | — | — | Compliant |
| WEST UNITY VILLAGE OH8601812 | WEST UNITY | 1,760 | — | — | Compliant |
| AQUA OHIO - PREBLE COUNTY OH6835203 | WESTERVILLE | 1,748 | — | — | Compliant |
| ANTWERP VILLAGE OH6300012 | ANTWERP | 1,741 | — | — | Compliant |
| CANAL POINTE INDUSTRIAL PARK PWS OH2346603 | CANAL WINCHESTER | 1,721 | — | — | Compliant |
| ERIE CO HURON EAST DISTRICT OH2200403 | HURON | 1,713 | — | — | Compliant |
| CANDLEWOOD LAKE ASSOCIATION INC OH5901012 | MOUNT GILLEAD | 1,710 | — | — | Compliant |
| TRUMBULL CO. - MOSQUITO CREEK PWS OH7806403 | VIENNA | 1,708 | — | — | Compliant |
| NORTHERN PERRY CO.WATER #1 OH6400912 | NEW LEXINGTON | 1,706 | — | — | Compliant |
| MCCOMB WATER DEPARTMENT OH3200414 | MCCOMB | 1,700 | — | — | Compliant |
| SOUTH AMHERST VILLAGE PWS OH4701411 | SOUTH AMHERST | 1,688 | — | — | Compliant |
| NEW PARIS VILLAGE PWS OH6800912 | NEW PARIS | 1,681 | — | — | Compliant |
| AYERSVILLE WATER AND SEWER DISTRICT OH2000903 | DEFIANCE | 1,660 | — | — | Compliant |
| SOUTH CHARLESTON VILLAGE PWS OH1204212 | LEBANON | 1,660 | — | — | Compliant |
| ORWELL VILLAGE PWS OH0401012 | ORWELL | 1,660 | — | — | Compliant |
| GLOUSTER PUBLIC WATER SYSTEM OH0500703 | GLOUSTER | 1,659 | — | — | Compliant |
| LEBANON, CITY OF-PLANT 2 OH8300722 | LEBANON | 1,657 | — | — | Compliant |
| FOREST VILLAGE OH3300312 | FOREST | 1,652 | — | — | Compliant |
| RUSSELLS POINT VILLAGE PWS OH4602212 | RUSSELLS POINT | 1,651 | — | — | Compliant |
| NORTHWESTERN W AND SD - MCCOMB OH3200411 | BOWLING GREEN | 1,650 | — | — | Compliant |
| MECHANICSBURG VILLAGE PWS OH1100712 | MECHANICSBURG | 1,644 | — | — | Compliant |
| ABERDEEN VILLAGE OH0800012 | ABERDEEN | 1,638 | — | — | Compliant |
| EAST CANTON VILLAGE PWS OH7601503 | LOUISVILLE | 1,606 | — | — | Compliant |
| TIMBERLAKE WATER SYSTEM OH2501812 | COLUMBUS | 1,600 | — | — | Compliant |
| PAYNE VILLAGE OH6300712 | PAYNE | 1,594 | — | — | Compliant |
| POWHATAN POINT PUBLIC WATER SYSTEM OH0701412 | POWHATAN POINT | 1,592 | — | — | Compliant |
| GREEN SPRINGS VILLAGE OH7400512 | GREEN SPRINGS | 1,592 | — | — | Compliant |
| NEWPORT WATER/SEWER DISTRICT PWS OH8400612 | NEWPORT | 1,582 | — | — | Compliant |
| DESHLER VILLAGE OH3500112 | DESHLER | 1,578 | — | — | Compliant |
| WARREN CO. MASSIE WAYNE PWS OH8345912 | LEBANON | 1,576 | — | — | Compliant |
| WINESBURG AREA DEVELOPMENT CORPORATION OH3801412 | WINESBURG | 1,575 | — | — | Compliant |
| FELICITY VILLAGE PWS OH1300612 | FELICITY | 1,573 | — | — | Compliant |
| LITHOPOLIS VILLAGE PWS OH2301112 | LITHOPOLIS | 1,573 | — | — | Compliant |
| CRAWFORD CO SWR DIST NO 2 PWS OH1700703 | BUCYRUS | 1,564 | — | — | Compliant |
| ANNA VILLAGE PWS OH7500012 | ANNA | 1,558 | — | — | Compliant |
| PHEASANT RUN ASSOCIATION PWS OH4701912 | LAGRANGE | 1,550 | — | — | Compliant |
| KALIDA VILLAGE OH6900512 | KALIDA | 1,542 | — | — | Compliant |
| OTTERBEIN-LEBANON RETREAT CENTER OH8301112 | LEBANON | 1,541 | — | — | Compliant |
| FORT LORAMIE VILLAGE PWS OH7500312 | FORT LORAMIE | 1,524 | — | — | Compliant |
| CINNAMON LAKE UTILITIES ASSOC INC OH0300411 | WEST SALEM | 1,522 | — | — | Compliant |
| BURTON VILLAGE PWS OH2800312 | BURTON | 1,520 | — | — | Compliant |
| RENO WATER AND SEWER 2 OH8402803 | MARIETTA | 1,520 | — | — | Compliant |
| LYNCHBURG VILLAGE PWS OH3600915 | LYNCHBURG | 1,515 | — | — | Compliant |
| CINCINNATI CHILDRENS HOSP IONIZATION SYS OH3139912 | CINCINNATI | 1,514 | — | — | Compliant |
| SHREVE VILLAGE PWS OH8503412 | SHREVE | 1,514 | — | — | Compliant |
| BATAVIA VILLAGE PWS OH1300011 | BATAVIA | 1,509 | — | — | Compliant |
| FT RECOVERY VILLAGE OH5400212 | FORT RECOVERY | 1,501 | — | — | Compliant |
| SUPT,MADISON WATER DEPARTMENT OH4300912 | MADISON | 1,500 | — | — | Compliant |
| GRAND RAPIDS VILLAGE OH8700711 | GRAND RAPIDS | 1,500 | — | — | Compliant |
| VINTON COUNTY WATER COMP OH8200603 | JACKSON | 1,500 | — | — | Compliant |
| V.A. MEDICAL CENTER OH7101912 | CHILLICOTHE | 1,500 | — | — | Compliant |
| NEW WATERFORD WATER DEPT. OH1501712 | NEW WATERFORD | 1,500 | — | — | Compliant |
| RICKENBACKER VICINITY WATER OH2503512 | COLUMBUS | 1,500 | — | — | Compliant |
| WELLSTON, CITY OF-SOUTH OH4000522 | WELLSTON | 1,500 | — | — | Compliant |
| TIPP CITY-WOODLAWN VILLAGE OH5502112 | TIPP CITY | 1,500 | — | — | Compliant |
| AQUA OHIO - BEECHCREST OH6705212 | MASSILLON | 1,496 | — | — | Compliant |
| SWITZER WATER ASSOCIATION OH5600603 | POWHATTAN POINT | 1,493 | — | — | Compliant |
| SOMERSET VILLAGE OF OH6401111 | SOMERSET | 1,490 | — | — | Compliant |
| GREENWICH VILLAGE PWS OH3900312 | GREENWICH | 1,476 | — | — | Compliant |
| CARLISLE CITY PWS OH8303803 | CARLISLE | 1,475 | — | — | Compliant |
| JACKSON CO. WATER - H OH4001303 | JACKSON | 1,464 | — | — | Compliant |
| JACKSON CENTER VILLAGE PWS OH7500512 | JACKSON CENTER | 1,462 | — | — | Compliant |
| ODRC-SOUTHEASTERN CORRECTIONAL INSTITUTE OH2301412 | LANCASTER | 1,461 | — | — | Compliant |
| ARLINGTON VILLAGE OH3200012 | ARLINGTON | 1,451 | — | — | Compliant |
| CHAUNCEY OH0500512 | CHAUNCEY | 1,428 | — | — | Compliant |
| LITTLE WALNUT WATER TREATMENT FACILITY OH2303212 | LANCASTER | 1,428 | — | — | Compliant |
| BREMEN VILLAGE OH2300212 | BREMEN | 1,425 | — | — | Compliant |
| ELMORE VILLAGE OH6200712 | WOODVILLE | 1,421 | — | — | Compliant |
| TIMBERBROOK MOBILE HOME PARK IN5220027 | CINCINNATI | 1,418 | — | — | Compliant |
| SALINEVILLE VILLAGE OH1502111 | WELLSVILLE | 1,414 | — | — | Compliant |
| WEST SALEM VILLAGE PWS OH8504311 | W SALEM | 1,410 | — | — | Compliant |
| BELLBROOK, CITY OF/DIST. OH2900012 | BELLBROOK | 1,407 | — | — | Compliant |
| HIRAM VILLAGE PWS OH6701612 | HIRAM | 1,406 | — | — | Compliant |
| MONROEVILLE VILLAGE OH3900811 | MONROEVILLE | 1,400 | — | — | Compliant |
| SCIOTO WATER, INC.-WHEELERSBURG OH7301003 | WHEELERSBURG | 1,397 | — | — | Compliant |
| LAKE LORELEI REGIONAL WATER PWS OH0800911 | FAYETTEVILLE | 1,392 | — | — | Compliant |
| NORTHERN OHIO RURAL WATER-HOLIDAY LKS PW OH3900412 | COLLINS | 1,388 | — | — | Compliant |
| LAGRANGE WATER DEPARTMENT OH4700611 | LAGRANGE | 1,385 | — | — | Compliant |
| WEST ALEXANDRIA, VILLAGE OF OH6801312 | WEST ALEXANDRIA | 1,385 | — | — | Compliant |
| PIKE WATER, INC.-ROSS #1 PWS OH6601703 | JASPER | 1,383 | — | — | Compliant |
| BETHESDA PUBLIC WATER SYSTEM OH0700511 | BETHESDA | 1,382 | — | — | Compliant |
| PIONEER VILLAGE OH8601312 | PIONEER | 1,380 | — | — | Compliant |
| PORTAGE-CATAWBA IS WATER OH6204603 | PORT CLINTON | 1,375 | — | — | Compliant |
| TILTONSVILLE PWS OH4102712 | TILTONSVILLE | 1,372 | — | — | Compliant |
| MILAN VILLAGE OH2201212 | MILAN | 1,371 | — | — | Compliant |
| JEFFERSONVILLE VILLAGE PWS OH2400612 | JEFFERSONVILLE | 1,356 | — | — | Compliant |
| WEST SALEM WATER DEPARTMENT OH8504314 | WEST SALEM | 1,350 | — | — | Compliant |
| FAYETTE VILLAGE OH2600412 | FAYETTE | 1,340 | — | — | Compliant |
| FRAZEYSBURG PWS OH6000612 | FRAZEYSBURG | 1,340 | — | — | Compliant |
| STRYKER VILLAGE OH8601712 | ARCHBOLD | 1,335 | — | — | Compliant |
| PEMBERVILLE VILLAGE OH8701712 | PEMBERVILLE | 1,326 | — | — | Compliant |
| OBETZ SATELLITE 6 PWS OH2566512 | OBETZ | 1,317 | — | — | Compliant |
| LEESBURG VILLAGE OH3600712 | LEBANON | 1,315 | — | — | Compliant |
| BISHOPVILLE WATER AND SEWER DISTRICT OH0500403 | MILLFIELD | 1,308 | — | — | Compliant |
| OHIO AND LEE TWP WATER AUTHORITY OH5600412 | SARDIS | 1,301 | — | — | Compliant |
| RIPLEY-UNION RURAL WATER PWS OH0801203 | RIPLEY | 1,300 | — | — | Compliant |
| NEW WATERFORD WATER DEPT. OH1501732 | NEW WATERFORD | 1,300 | — | — | Compliant |
| CATALINA MOBILE HOME PARK OH0900512 | MIDDLETOWN | 1,280 | — | — | Compliant |
| WALNUT CREEK WATER CO. OH3801512 | WALNUT CREEK | 1,270 | — | — | Compliant |
| OBETZ SATELLITE 2 PWS OH2554603 | OBETZ | 1,267 | — | — | Compliant |
| JACKSON CO. WATER - A OH4000203 | JACKSON | 1,263 | — | — | Compliant |
| GREENE COUNTY - WILBERFORCE PWS OH2903803 | BEAVERCREEK | 1,258 | — | — | Compliant |
| BOTKINS VILLAGE PWS OH7500212 | BOTKINS | 1,250 | — | — | Compliant |
| NORTHEAST WATER SYSTEM OH2637812 | WAUSEON | 1,250 | — | — | Compliant |
| NEW VIENNA VILLAGE OH1400815 | NEW VIENNA | 1,240 | — | — | Compliant |
| GNADENHUTTEN OH7900512 | GNADENHUTTEN | 1,240 | — | — | Compliant |
| NEW WATERFORD VILLAGE PWS OH1501722 | NEW WATERFORD | 1,238 | — | — | Compliant |
| SMITHVILLE VILLAGE PWS OH8503512 | LAKEVILLE | 1,232 | — | — | Compliant |
| AQUA OHIO - LAKE WHITE PWS OH6600312 | WESTERVILLE | 1,229 | — | — | Compliant |
| PLEASANT HILL VILLAGE PWS OH5501312 | PLEASANT HILL | 1,226 | — | — | Compliant |
| NEW WASHINGTON WATER DEPT OH1700414 | NEW WASHINGTON | 1,225 | — | — | Compliant |
| DEGRAFF VILLAGE PWS OH4600512 | DEGRAFF | 1,215 | — | — | Compliant |
| PORTAGE COUNTY WR - MANTUA VILLAGE PWS OH6702212 | RAVENNA | 1,207 | — | — | Compliant |
| PANDORA VILLAGE OH6900912 | PANDORA | 1,204 | — | — | Compliant |
| GREENE CO.WOODSIDE PARK SAN D. OH2901312 | XENIA | 1,200 | — | — | Compliant |
| MALVERN VILLAGE PWS OH1000112 | MALVERN | 1,200 | — | — | Compliant |
| MOHAWK UTILITIES INC, PLANT #1 OH1000312 | MALVERN | 1,200 | — | — | Compliant |
| ROLLING ACRES MOBILE PK. OH3101912 | HARRISON | 1,200 | — | — | Compliant |
| COPLEY SQUARE WATER CO. OH7705812 | WARRENSVILLE HEIGHTS | 1,200 | — | — | Compliant |
| MOHAWK UTILITIES INC,PLANT # 2 OH1000322 | MALVERN | 1,200 | — | — | Compliant |
| SUPT,LYNCHBURG WATER DEPT. OH3600916 | LYNCHBURG | 1,200 | — | — | Compliant |
| GREEN COVE CONDOMINIUMS OH6204811 | OAK HARBOR | 1,200 | — | — | Compliant |
| BELOIT PUBLIC WATER SYSTEM OH5002903 | SEBRING | 1,200 | — | — | Compliant |
| ASHLEY VILLAGE PWS OH2100011 | ASHLEY | 1,198 | — | — | Compliant |
| APPLE CREEK VILLAGE PWS OH8500112 | LAKEVILLE | 1,190 | — | — | Compliant |
| LIBERTY CENTER VILLAGE OH3500603 | LIBERTY CENTER | 1,180 | — | — | Compliant |
| ANSONIA VILLAGE PWS OH1900012 | ANSONIA | 1,174 | — | — | Compliant |
| CONTINENTAL VILLAGE OH6900212 | DELPHOS | 1,153 | — | — | Compliant |
| HOLGATE VILLAGE OH3500512 | HOLGATE | 1,150 | — | — | Compliant |
| ATTICA VILLAGE OH7400011 | ATTICA | 1,148 | — | — | Compliant |
| CRAINS RUN WATER AND SEWER DISTRICT PWS OH5703312 | MIAMISBURG | 1,125 | — | — | Compliant |
| ROCKFORD VILLAGE OH5401112 | ROCKFORD | 1,120 | — | — | Compliant |
| XENIA/AMLIN WATER SYSTEM OH2902912 | XENIA | 1,120 | — | — | Compliant |
| JACKSON CO. WATER-WELL D PWS OH4000303 | JACKSON | 1,112 | — | — | Compliant |
| SUPT,LIBERTY CENTER WATER DEPT OH3500612 | LIBERTY CENTER | 1,111 | — | — | Compliant |
| CONVOY VILLAGE OH8100112 | CONVOY | 1,100 | — | — | Compliant |
| SAHARA MOBILE HOME PARK OH4301912 | MADISION | 1,100 | — | — | Compliant |
| ARLINGTON HEIGHTS WATER DEPT. OH3100203 | ARLINGTON HEIGHTS | 1,100 | — | — | Compliant |
| EASTVIEW COMMUNITY WATER ASSOCIATION OH7000912 | BELLVILLE | 1,100 | — | — | Compliant |
| FRANKFORT VILLAGE PWS OH7100712 | FRANKFORT | 1,100 | — | — | Compliant |
| ERIE CO HURON SOUTH DISTRICT OH2200703 | HURON | 1,086 | — | — | Compliant |
| MAGNOLIA VILLAGE PWS OH7603112 | MAGNOLIA | 1,085 | — | — | Compliant |
| JACKSON CO. WATER-L OH4001503 | JACKSON | 1,084 | — | — | Compliant |
| LAKEVIEW VILLAGE PWS OH4601512 | LAKEVIEW | 1,083 | — | — | Compliant |
| TUSCARAWAS VILLAGE OH7901512 | TUSCARAWAS | 1,056 | — | — | Compliant |
| WINCHESTER PUBLIC WATER SYSTEM OH0100603 | SEAMAN | 1,052 | — | — | Compliant |
| ERIE CO-E.ERIE/BERLIN HTS SD. OH2200511 | HURON | 1,052 | — | — | Compliant |
| METAMORA VILLAGE OH2600711 | METAMORA | 1,050 | — | — | Compliant |
| WAKEMAN VILLAGE PWS OH3901411 | WAKEMAN | 1,047 | — | — | Compliant |
| WILLIAMSPORT VILLAGE PWS OH6503012 | WILLIAMSPORT | 1,038 | — | — | Compliant |
| KINGSTON VILLAGE PWS OH7100912 | KINGSTON | 1,032 | — | — | Compliant |
| BEACH CITY VILLAGE PWS OH7600212 | BEACH CITY | 1,031 | — | — | Compliant |
| ERIE CO/BERLIN HEIGHTS SEW DIS OH2200503 | SANDUSKY | 1,028 | — | — | Compliant |
| ANDOVER VILLAGE PWS OH0400012 | ANDOVER | 1,019 | — | — | Compliant |
| YORKVILLE VILLAGE PWS OH4103112 | YORKVILLE | 1,019 | — | — | Compliant |
| DANVILLE VILLAGE PWS OH4200112 | DANVILLE | 1,014 | — | — | Compliant |
| FARMERSVILLE VILLAGE PWS OH5700912 | FARMERSVILLE | 1,009 | — | — | Compliant |
| FAIRBORN NORTH WELL FIELD OH2900632 | FAIRBORN | 1,001 | — | — | Compliant |
| GLANDORF VILLAGE OH6901303 | GLANDORF | 1,001 | — | — | Compliant |
| OHIO WATER SERVICE,LEE,MADISON OH4301311 | GENEVA | 1,001 | — | — | Compliant |
| FAIRBORN-CITY/CENTRAL PARK OH2900622 | FAIRBORN | 1,001 | — | — | Compliant |
| SUPT-SPRINGBORO MILL ST.WTP OH8301422 | SPRINGBORO | 1,001 | — | — | Compliant |
| SEVEN MILE VILLAGE PWS OH0902612 | SEVEN MILE | 1,000 | — | — | Compliant |
| WARREN CO,SOCIALVILLE WAT.AREA OH8302103 | LEBANON | 1,000 | — | — | Compliant |
| SUPT,MINGO ESTATES WATER SYS. OH2301612 | PICKERINGTON | 1,000 | — | — | Compliant |
| BOLIVAR VILLAGE PWS OH7900212 | BOLIVAR | 998 | — | — | Compliant |
| GREENE COUNTY - CLYO PWS OH2904203 | BEAVERCREEK | 996 | — | — | Compliant |
| THORNVILLE, VILLAGE OF OH6401212 | THORNVILLE | 991 | — | — | Compliant |
| JEFFERSON CO.SAN.DIST.-G PWS OH4100903 | WINTERSVILLE | 990 | — | — | Compliant |
| GRATIS VILLAGE PWS OH6800612 | GRATIS | 990 | — | — | Compliant |
| NEW WASHINGTON VILLAGE OH1700411 | NEW WASHINGTON | 987 | — | — | Compliant |
| BRADNER VILLAGE OH8700412 | BRADNER | 985 | — | — | Compliant |
| HOPEDALE VILLAGE PWS OH3400811 | HOPEDALE | 984 | — | — | Compliant |
| LAKE LUCERNE CLUB CO. OH2801512 | CHAGRIN FALLS | 980 | — | — | Compliant |
| OTTOVILLE VILLAGE OH6900812 | OTTOVILLE | 976 | — | — | Compliant |
| PHILO OH6001912 | PHILO | 974 | — | — | Compliant |
| HAMDEN VILLAGE PWS OH8200003 | HAMDEN | 970 | — | — | Compliant |
| PLEASANTVILLE VILLAGE PWS OH2301712 | PLEASANTVILLE | 960 | — | — | Compliant |