16,281 water systems tracked in Ohio, serving 15,864,172 people. 197 systems exceed EPA's 4 ppt limit for PFOA or PFOS and must be treating for PFAS by April 2029.
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.
EPA pulls guidance to address PFAS in wastewater permits
Reported by wastedive.com. EPA pulls guidance to address PFAS in wastewater permits Waste Dive
2026-09-18 · Read more →
BioLargo to Participate in Gabelli Funds' 4th Annual PFAS Symposium in New York
Reported by newswire.com. BioLargo to Participate in Gabelli Funds' 4th Annual PFAS Symposium in New York newswire.com
2026-08-25 · Read more →
Court Declines to Overturn EPA Designation of Two ‘Forever Chemicals’
Reported by notus.org. Court Declines to Overturn EPA Designation of Two ‘Forever Chemicals’ News of the United States - NOTUS
2026-08-18 · Read more →
Gov. Josh Stein and state leaders oppose EPA-Chemours PFAS deal in court
Reported by wwaytv3.com. Gov. Josh Stein and state leaders oppose EPA-Chemours PFAS deal in court WWAYTV3
2026-07-30 · Read more →
A key ‘forever chemicals’ lawsuit settles out of court in North Carolina
Reported by ncnewsline.com. A key ‘forever chemicals’ lawsuit settles out of court in North Carolina NC Newsline
2026-07-14 · Read more →
Free check against EPA UCMR5 data for PFOA and PFOS above the 4 ppt limit, plus weekly Ohio MCL, deadline, and funding alerts.
Firms with PFAS-related federal awards routed to Ohio (USASpending). See the national top 50 →
| Rank | Recipient | Total awarded | # awards |
|---|---|---|---|
| 1 | THE STATE OF OHIO OFFICE OF BUDGET AND MANAGEMENT | $161,657,275 | 7 |
| 2 | WESTON - ER FEDERAL SERVICES, LLC | $26,459,897 | 1 |
| 3 | LEIDOS, INC. | $12,665,408 | 2 |
| 4 | PEGASUS TECHNICAL SERVICES, INC | $7,321,851 | 13 |
| 5 | APTIM FEDERAL SERVICES, LLC | $4,349,694 | 3 |
| 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 |
| DEL-CO WATER COMPANY, INC. OH2101412 | DELAWARE | 150,000 | 4.2 | — | Exceeds |
| MONTGOMERY CO:WATER SYSTEM # 1 OH5701303 | DAYTON | 150,000 | — | — | Compliant |
| 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 PWS 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 |
| AQUA OHIO - MARION OH5100414 | MARION | 47,102 | — | — | Compliant |
| MEDINA CO/NORTHWEST PWS OH5201903 | MEDINA | 46,324 | — | — | Compliant |
| CLEVELAND HEIGHTS CITY PWS OH1800403 | CLEVELAND HEIGHTS | 46,000 | — | — | Compliant |
| FAIRFIELD CITY PWS OH0900715 | HAMILTON | 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 |
| CANTON WATER DEPT-NORTHEAST OH7601012 | CANTON | 40,000 | — | — | Compliant |
| FINDLAY WATER DEPARTMENT OH3200114 | FINDLAY | 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 |
| WARREN CO. FRANKLIN AREA PWS OH8301603 | LEBANON | 36,725 | — | — | 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 | 32,342 | — | — | 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 |
| NAWA OH5553612 | TIPP CITY | 29,974 | — | — | 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 PWS 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 |
| 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 | 20,279 | — | — | 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 AREA 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 |
| TALLMADGE CITY PWS OH7704703 | TALLMADGE | 18,394 | — | — | Compliant |
| FREMONT CITY OH7200311 | FREMONT | 18,319 | — | — | Compliant |
| NORTHERN OHIO RURAL WATER OH3902403 | NORWALK | 18,224 | — | — | Compliant |
| LICKING REGIONAL WATER DISTRICT OH4505412 | BALTIMORE | 17,818 | — | — | Compliant |
| SUPT,BELMONT CO.SAN.DIST.NO.3 OH0700411 | SAINT CLAIRSVILLE | 17,800 | — | — | Compliant |
| NORWALK CITY PWS OH3901111 | NORWALK | 17,466 | — | — | Compliant |
| NEW PHILADELPHIA CITY PWS OH7900812 | NEW PHILADELPHIA | 17,410 | — | — | Compliant |
| ERIE CO PERKINS DISTRICT OH2200603 | HURON | 17,241 | — | — | 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 |
| SUPT,RAVENNA WATER DEPARTMENT OH6703214 | RAVENNA | 16,000 | — | — | Compliant |
| DUBLIN, CITY OF OH2504112 | DUBLIN | 16,000 | — | — | Compliant |
| RAVENNA CITY PWS OH6703211 | 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 |
| VANDALIA CITY PWS OH5702603 | VANDALIA | 15,000 | — | — | Compliant |
| INDIAN HILL CITY PWS OH3101112 | CINCINNATI | 15,000 | — | 12.4 | Exceeds |
| ASHTABULA COUNTY WATER SYSTEM OH0400803 | JEFFERSON | 14,757 | — | — | 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 |
| 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 |
| 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 |
| FRANKLIN PUBLIC WATER SYSTEM OH8300412 | FRANKLIN | 11,690 | — | 4.1 | Exceeds |
| CELINA, CITY OF 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 |
| HDMA - BENTON RD PWS OH8035512 | MARYSVILLE | 11,025 | — | — | Compliant |
| WAPAKONETA CITY PWS OH0600712 | WAPAKONETA | 11,000 | — | — | Compliant |
| MASON, CITY OF OH8300812 | MASON | 11,000 | — | — | Compliant |
| MASON, CITY OF - SOUTH OH8304312 | MASON | 11,000 | — | — | Compliant |
| VAN WERT CITY OH8100611 | VAN WERT | 10,846 | — | — | Compliant |
| VERMILION CITY OH2201511 | VERMILION | 10,594 | — | — | 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 |
| MID-OHIO WSD - CHRISMAN AVENUE WTP 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, MGS OH1300422 | BATAVIA | 10,000 | — | — | Compliant |
| CLERMONT COUNTY WATER, PUB OH1300412 | 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 |
| CHILLICOTHE CORRECTIONAL INSTITUTION OH7101212 | OAK HILL | 9,000 | — | — | Compliant |
| HUBBARD WATER DEPARTMENT OH7801412 | HUBBARD | 9,000 | — | — | Compliant |
| TROTWOOD CITY PWS OH5702403 | TROTWOOD | 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 PWS 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 |
| HUBBARD CITY PWS OH7801415 | HUBBARD | 8,518 | — | — | Compliant |
| 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 |
| WEST CARROLLTON CITY PWS OH5702812 | CAMDEN | 8,361 | — | — | Compliant |
| KENTON CITY OH3300612 | KENTON | 8,360 | — | — | 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 |
| KNOX COUNTY WATER AND WASTEWATER PWS OH4202012 | MOUNT VERNON | 7,710 | — | — | Compliant |
| CANFIELD CITY PWS OH5000503 | CANFIELD | 7,706 | 4.2 | 12.4 | Exceeds |
| RATTLESNAKE PWS OH2437412 | WASHINGTON COURT HOUSE | 7,685 | — | — | Compliant |
| HOLLYWOOD GAMING @ MVRC OH5055013 | AUSTINTOWN | 7,625 | — | — | Compliant |
| WAUSEON CITY PWS 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 |
| UNION CITY PWS OH5702512 | UNION | 7,000 | 4.8 | — | Exceeds |
| MARTINS FERRY PUBLIC WATER SYSTEM OH0701212 | MARTINS FERRY | 6,980 | 6.1 | — | Exceeds |
| HURON CITY OH2201011 | HURON | 6,893 | — | — | Compliant |
| ONTARIO CITY OH7003512 | ONTARIO | 6,756 | — | — | 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 |
| LEADING CREEK CONSERVANCY DISTRICT OH5300012 | RUTLAND | 6,663 | 7.6 | — | Exceeds |
| NELSONVILLE PWS OH0501214 | NELSONVILLE | 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 |
| MAYSVILLE REGIONAL WATER OH6001411 | WHITE COTTAGE | 6,540 | 4 | — | At risk |
| WATERVILLE CITY OH4801503 | WATERVILLE | 6,500 | — | — | Compliant |
| PORT CLINTON CITY OH6203211 | PORT CLINTON | 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 |
| 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 |
| WELLSTON CITY PWS OH4001912 | WELLSTON | 5,846 | — | — | Compliant |
| JEFFERSON CO,SD 1,EMPIRE OH4100712 | STEUBENVILLE | 5,800 | — | — | Compliant |
| NEW CARLISLE CITY PWS OH1203312 | NEW CARLISLE | 5,800 | — | — | 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 |
| GERMANTOWN CITY PWS OH5701012 | GERMANTOWN | 5,547 | — | — | Compliant |
| SUNDAY CREEK VALLEY WATER PWS OH0501503 | MILLFIELD | 5,451 | — | — | Compliant |
| AQUA OHIO - HUBER RIDGE PWS OH2502512 | WESTERVILLE | 5,393 | — | — | 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. OH1800214 | CHAGRIN FALLS | 5,200 | — | — | Compliant |
| WHITEHOUSE VILLAGE OH4801612 | WHITEHOUSE | 5,200 | — | — | Compliant |
| JOHNSTOWN CITY PWS OH4501512 | JOHNSTOWN | 5,200 | — | — | Compliant |
| SUPT,CHAGRIN FALLS WATER DEPT. OH1801412 | CHAGRIN FALLS | 5,200 | — | — | Compliant |
| MID-OHIO WSD - OLD SPRINGFIELD ROAD WTP 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 |
| PUT-IN-BAY VILLAGE OH6203311 | PUT-IN-BAY | 5,000 | — | — | Compliant |
| CHAGRIN FALLS VILLAGE PWS OH1800212 | CHAGRIN FALLS | 4,991 | — | — | Compliant |
| WEST MILTON VILLAGE PWS OH5501711 | WEST MILTON | 4,890 | — | — | Compliant |
| LEXINGTON VILLAGE OH7002212 | LEXINGTON | 4,825 | — | — | Compliant |
| JEFFERSON REGIONAL WATER AUTHORITY OH5703012 | MIAMISBURG | 4,813 | — | — | 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 |
| MEDINA CO/SOUTHERN WATER DIST PWS OH5260712 | COLUMBIA STATION | 4,708 | — | — | Compliant |
| GUERNSEY CO.SAN.DISTRICT NO.6 OH3000612 | CAMBRIDGE | 4,640 | — | — | Compliant |
| GREENFIELD VILLAGE PWS OH3600312 | GREENFIELD | 4,600 | — | — | Compliant |
| ASHVILLE VILLAGE PWS OH6500012 | ASHVILLE | 4,529 | — | — | Compliant |
| CRESTLINE VILLAGE PWS OH1700112 | CRESTLINE | 4,525 | — | — | Compliant |
| WEST JEFFERSON VILLAGE PWS OH4902012 | WEST JEFFERSON | 4,488 | — | — | Compliant |
| MID-OHIO WSD - JACKSON STREET WTP OH4901112 | COLUMBUS | 4,467 | — | — | Compliant |
| WAVERLY CITY PWS OH6600912 | WAVERLY | 4,433 | — | — | Compliant |
| OAK HARBOR VILLAGE OH6202603 | OAK HARBOR | 4,400 | — | — | Compliant |
| OTTAWA VILLAGE OH6900711 | OTTAWA | 4,393 | — | — | Compliant |
| TRUMBULL CO-FOUR TWP.WAT.DIST. OH7803403 | WARREN | 4,384 | — | — | Compliant |
| MONROE WATER SYSTEMS OH5600812 | LAINGS | 4,334 | — | — | Compliant |
| GEORGETOWN VILLAGE PWS OH0800503 | GEORGETOWN | 4,331 | 4.7 | — | Exceeds |
| WATERVILLE WATER DEPARTMENT OH4801511 | WATERVILLE | 4,300 | — | — | Compliant |
| MONTPELIER VILLAGE OH8600912 | MONTPELIER | 4,280 | — | — | Compliant |
| BELLAIRE PUBLIC WATER SYSTEM OH0700114 | BELLAIRE | 4,278 | — | — | Compliant |
| BLANCHESTER VILLAGE PWS OH1400111 | FAYETTEVILLE | 4,243 | — | — | Compliant |
| MCDONALD VILLAGE PWS OH7802003 | MCDONALD | 4,236 | — | 21.2 | Exceeds |
| 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 |
| ELIDA VILLAGE OH0200503 | ELIDA | 4,109 | — | — | Compliant |
| WAYNESVILLE VILLAGE PWS OH8302012 | WAYNESVILLE | 4,100 | — | — | Compliant |
| SOUTHERN PERRY CO-CONGO OH6401603 | CROOKSVILLE | 4,029 | — | — | Compliant |
| AQUA OHIO - MASURY OH7802711 | STRUTHERS | 4,016 | — | — | Compliant |
| CLINTON COUNTY RURAL WATER CO. OH1401303 | WILMINGTON | 4,000 | — | — | Compliant |
| SUPT-WALBRIDGE WATER DEPT. OH8702803 | WALBRIDGE | 4,000 | — | — | Compliant |
| OAK HARBOR WATER DEPARTMENT OH6202615 | OAK HARBOR | 4,000 | — | — | Compliant |
| CEDARVILLE UNIVERSITY OH2903612 | CEDARVILLE | 4,000 | — | — | Compliant |
| EATON, CITY OF-BLACK PLT. OH6800422 | EATON | 3,975 | — | — | Compliant |
| WINTERSVILLE VILLAGE PWS OH4103003 | WINTERSVILLE | 3,924 | — | — | Compliant |
| SOUTH LEBANON CITY PWS OH8301312 | SOUTH LEBANON | 3,891 | — | — | Compliant |
| NEWCOMERSTOWN VILLAGE PWS OH7900912 | NEWCOMERSTOWN | 3,882 | — | — | Compliant |
| SWANTON VILLAGE OH2601011 | SWANTON | 3,855 | — | — | Compliant |
| NEW LEBANON VILLAGE PWS OH5701812 | NEW LEBANON | 3,770 | — | — | 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 |
| MINERVA VILLAGE PWS OH7603812 | MINERVA | 3,684 | — | — | Compliant |
| CAREY VILLAGE PWS OH8800012 | CAREY | 3,674 | — | — | 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 PWS 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 |
| NEW MIAMI VILLAGE PWS OH0902112 | NEW MIAMI | 3,200 | — | — | Compliant |
| MILLERSPORT VILLAGE PWS OH2301212 | MILLERSPORT | 3,200 | — | — | Compliant |
| FAIRPORT HARBOR VILLAGE PWS OH4300411 | FAIRPORT HARBOR | 3,180 | — | — | Compliant |
| WEST UNION PUBLIC WATER SYSTEM OH0100503 | WEST UNION | 3,170 | — | — | Compliant |
| 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 |
| 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 |
| TRI-COUNTY RURAL W AND S DISTRICT OH8403112 | WATERFORD | 3,000 | — | — | Compliant |
| MGR,J.W.SMITH WATER SERVICE OH1301603 | GOSHEN | 3,000 | — | — | Compliant |
| GEAUGA COUNTY-BAINBRIDGE OH2804003 | CHARDON | 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 |
| COLUMBIA PARK WATER SYSTEM OH1841012 | OLMSTED TWP | 2,716 | — | — | Compliant |
| REMINDERVILLE, VILLAGE O OH6705012 | AURORA | 2,700 | — | — | Compliant |
| SUPT,ELIDA WATER DEPARTMENT OH0200512 | ELIDA | 2,700 | — | — | Compliant |
| OH/CR STATE REFORMATORY OH7003412 | MANSFIELD | 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 |
| JEFFERSON CO W AND S DISTRICT- A OH4100803 | STEUBENVILLE | 2,635 | — | — | Compliant |
| BETHEL VILLAGE PWS OH1300116 | BETHEL | 2,620 | 7.9 | — | Exceeds |
| 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 |
| SABINA VILLAGE PWS OH1400912 | SABINA | 2,564 | — | — | 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 PWS OH7200412 | GIBSONBURG | 2,506 | — | — | Compliant |
| HARRISON TWP WATER CORP. OH3100903 | HARRISON | 2,500 | — | — | Compliant |
| GLENDALE VILLAGE PWS OH3100712 | GLENDALE | 2,500 | — | — | Compliant |
| AQUA OHIO - WORTHINGTON HILLS PWS OH2502812 | WESTERVILLE | 2,500 | — | — | Compliant |
| MADISON WATER DEPARTMENT OH4300914 | MADISON | 2,500 | — | — | Compliant |
| SWITZERLAND OF OHIO WATER OH5600503 | JERUSALEM | 2,500 | — | — | 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 PWS OH0600212 | CRIDERVILLE | 2,410 | — | — | Compliant |
| LAGRANGE VILLAGE PWS OH4700603 | LAGRANGE | 2,400 | — | — | Compliant |
| AQUA OHIO - MOHAWK PWS OH1000812 | MASSILLON | 2,376 | — | — | Compliant |
| AYERSVILLE WATER AND SEWER DISTRICT OH2000903 | DEFIANCE | 2,372 | — | — | Compliant |
| TRI-COUNTY WATER AUTHORITY OH3401403 | HARRISVILLE | 2,370 | — | — | Compliant |
| HEBRON VILLAGE PWS OH4501012 | HEBRON | 2,368 | — | — | Compliant |
| NOBLE COUNTY WATER AUTHORITY PWS OH6100503 | BELLE VALLEY | 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 |
| MGR.BROWN CO RURAL WATER ASSN OH0800103 | GEORGETOWN | 2,310 | — | — | Compliant |
| LAKESIDE ASSOCIATION PWS OH6202011 | LAKESIDE | 2,300 | — | — | Compliant |
| GAMBIER VILLAGE PWS OH4200403 | GAMBIER | 2,300 | — | — | Compliant |
| SEVILLE VILLAGE PWS OH5201412 | SEVILLE | 2,296 | — | — | Compliant |
| CARROLL WATER AND SEWER OH6205111 | OAK HARBOR | 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 |
| RICHWOOD VILLAGE PWS OH8000412 | RICHWOOD | 2,200 | — | — | Compliant |
| CHOCTAW UTILITIES, INC. OH4900212 | LONDON | 2,200 | — | — | 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 |
| SWITZERLAND OF OHIO WATER DIST OH5600511 | JERUSALEM | 2,100 | — | — | Compliant |
| CENTRAL STATE UNIVERSITY OH2901912 | XENIA | 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 |
| DALTON VILLAGE PWS OH8500412 | DALTON | 2,000 | — | — | Compliant |
| BRILLIANT WATER AND SEWER OH4100412 | BRILLIANT | 2,000 | — | — | Compliant |
| BYESVILLE, VLG. OF-PLT 2 OH3000022 | BYESVILLE | 2,000 | — | — | Compliant |
| BRADFORD VILLAGE PWS OH1900212 | BRADFORD | 2,000 | — | — | Compliant |
| GEM BEACH UTILITY CO OH6200811 | PORT CLINTON | 2,000 | — | — | Compliant |
| MGR,KENYON COLLEGE WATER SUPLY OH4200412 | GAMBIER | 2,000 | — | — | Compliant |
| SUPT,PLYMOUTH WATER DEPARTMENT OH7004012 | PLYMOUTH | 2,000 | — | — | Compliant |
| DRESDEN PWS OH6000212 | DRESDEN | 2,000 | — | — | Compliant |
| BYESVILLE, VLG. OF-PLT 1 OH3000012 | BYESVILLE | 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 |
| MCARTHUR, VILLAGE OF OH8200212 | MCARTHUR | 1,920 | — | — | Compliant |
| BELLVILLE VILLAGE OH7000012 | BELLVILLE | 1,918 | — | — | Compliant |
| MAHONING CO.-CRAIG BEACH OH5001112 | Youngstown | 1,900 | — | — | Compliant |
| BEVERLY VILLAGE PWS OH8400112 | WATERFORD | 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 |
| SWITZER WATER ASSOCIATION OH5600603 | POWHATTAN POINT | 1,860 | — | — | 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 |
| LEWISBURG VILLAGE PWS OH6800812 | LEWISBURG | 1,800 | — | — | Compliant |
| TANGLEWOOD LAKE WATER CO OH2802512 | CHAGRIN FALLS | 1,800 | — | — | Compliant |
| WEST LIBERTY VILLAGE PWS OH4602412 | WEST LIBERTY | 1,800 | — | — | Compliant |
| POMEROY VILLAGE PWS OH5300212 | POMEROY | 1,800 | — | — | Compliant |
| MORCO WATER COMPANY,INC OH5901103 | MARENGO | 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 PWS 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 |
| CARLISLE CITY PWS OH8303803 | CARLISLE | 1,675 | — | — | 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 |
| RUSSELLS POINT VILLAGE PWS OH4602212 | RUSSELLS POINT | 1,651 | — | — | Compliant |
| MECHANICSBURG VILLAGE PWS OH1100712 | MECHANICSBURG | 1,644 | — | — | Compliant |
| ABERDEEN VILLAGE OH0800012 | ABERDEEN | 1,638 | — | — | Compliant |
| OHIO AND LEE TWP WATER AUTHORITY OH5600412 | SARDIS | 1,620 | — | — | Compliant |
| EAST CANTON VILLAGE PWS OH7601503 | LOUISVILLE | 1,606 | — | — | Compliant |
| TIMBERLAKE WATER SYSTEM OH2501812 | COLUMBUS | 1,600 | — | — | Compliant |
| POWHATAN POINT PUBLIC WATER SYSTEM OH0701412 | POWHATAN POINT | 1,592 | — | — | Compliant |
| GREEN SPRINGS VILLAGE PWS 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 |
| LITHOPOLIS VILLAGE PWS OH2301112 | LITHOPOLIS | 1,573 | — | — | Compliant |
| FELICITY VILLAGE PWS OH1300612 | FELICITY | 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 |
| PAYNE VILLAGE PWS OH6300712 | PAYNE | 1,550 | — | — | Compliant |
| KALIDA VILLAGE PWS OH6900512 | KALIDA | 1,542 | — | — | Compliant |
| OTTERBEIN-LEBANON RETREAT CENTER OH8301112 | LEBANON | 1,541 | — | — | Compliant |
| NORTHWESTERN W AND SD - MCCOMB OH3200411 | BOWLING GREEN | 1,527 | — | — | 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 |
| SHREVE VILLAGE PWS OH8503412 | SHREVE | 1,514 | — | — | Compliant |
| CINCINNATI CHILDRENS HOSP IONIZATION SYS OH3139912 | CINCINNATI | 1,514 | — | — | Compliant |
| BATAVIA VILLAGE PWS OH1300011 | BATAVIA | 1,509 | — | — | Compliant |
| FT RECOVERY VILLAGE OH5400212 | FORT RECOVERY | 1,501 | — | — | Compliant |
| VINTON COUNTY WATER COMP OH8200603 | JACKSON | 1,500 | — | — | Compliant |
| WELLSTON, CITY OF-SOUTH OH4000522 | WELLSTON | 1,500 | — | — | Compliant |
| NEW WATERFORD WATER DEPT. OH1501712 | NEW WATERFORD | 1,500 | — | — | Compliant |
| TIPP CITY-WOODLAWN VILLAGE OH5502112 | TIPP CITY | 1,500 | — | — | Compliant |
| RICKENBACKER VICINITY WATER OH2503512 | COLUMBUS | 1,500 | — | — | Compliant |
| V.A. MEDICAL CENTER OH7101912 | CHILLICOTHE | 1,500 | — | — | Compliant |
| GRAND RAPIDS VILLAGE OH8700711 | GRAND RAPIDS | 1,500 | — | — | Compliant |
| SUPT,MADISON WATER DEPARTMENT OH4300912 | MADISON | 1,500 | — | — | Compliant |
| AQUA OHIO - BEECHCREST OH6705212 | MASSILLON | 1,496 | — | — | Compliant |
| SOMERSET VILLAGE OF OH6401111 | SOMERSET | 1,490 | — | — | Compliant |
| GREENWICH VILLAGE PWS OH3900312 | GRAFTON | 1,476 | — | — | Compliant |
| ARLINGTON VILLAGE PWS OH3200012 | ARLINGTON | 1,474 | — | — | 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 |
| PIONEER VILLAGE OH8601312 | PIONEER | 1,449 | — | — | 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 |
| PORTAGE-CATAWBA IS WATER OH6204603 | PORT CLINTON | 1,375 | — | — | Compliant |
| TILTONSVILLE PWS OH4102712 | TILTONSVILLE | 1,372 | — | — | Compliant |
| MILAN VILLAGE PWS OH2201212 | MILAN | 1,371 | — | — | Compliant |
| JEFFERSONVILLE VILLAGE PWS OH2400612 | JEFFERSONVILLE | 1,356 | — | — | Compliant |
| FOREST VILLAGE OH3300312 | FOREST | 1,354 | — | — | Compliant |
| LIBERTY CENTER VILLAGE OH3500603 | LIBERTY CENTER | 1,350 | — | — | 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 |
| PEMBERVILLE VILLAGE PWS 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 |
| 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 |
| STRYKER VILLAGE OH8601712 | ARCHBOLD | 1,259 | — | — | Compliant |
| GREENE COUNTY - WILBERFORCE PWS OH2903803 | BEAVERCREEK | 1,258 | — | — | Compliant |
| NORTHEAST WATER SYSTEM OH2637812 | WAUSEON | 1,250 | — | — | Compliant |
| BOTKINS VILLAGE PWS OH7500212 | BOTKINS | 1,250 | — | — | Compliant |
| GNADENHUTTEN OH7900512 | GNADENHUTTEN | 1,240 | — | — | Compliant |
| NEW VIENNA VILLAGE OH1400815 | NEW VIENNA | 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 PWS OH6900912 | PANDORA | 1,204 | — | — | 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 |
| MOHAWK UTILITIES INC,PLANT # 2 OH1000322 | MALVERN | 1,200 | — | — | Compliant |
| GREEN COVE CONDOMINIUMS OH6204811 | OAK HARBOR | 1,200 | — | — | Compliant |
| COPLEY SQUARE WATER CO. OH7705812 | WARRENSVILLE HEIGHTS | 1,200 | — | — | Compliant |
| GREENE CO.WOODSIDE PARK SAN D. OH2901312 | XENIA | 1,200 | — | — | Compliant |
| SUPT,LYNCHBURG WATER DEPT. OH3600916 | LYNCHBURG | 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 |
| ANSONIA VILLAGE PWS OH1900012 | ANSONIA | 1,174 | — | — | Compliant |
| CONTINENTAL VILLAGE PWS 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 |
| FRANKFORT VILLAGE PWS OH7100712 | FRANKFORT | 1,100 | — | — | 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 |
| 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 |
| ERIE CO-E.ERIE/BERLIN HTS SD. OH2200511 | HURON | 1,052 | — | — | Compliant |
| WINCHESTER PUBLIC WATER SYSTEM OH0100603 | SEAMAN | 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 |
| YORKVILLE VILLAGE PWS OH4103112 | YORKVILLE | 1,019 | — | — | Compliant |
| ANDOVER VILLAGE PWS OH0400012 | ANDOVER | 1,019 | — | — | Compliant |
| FAIRBORN NORTH WELL FIELD OH2900632 | FAIRBORN | 1,001 | — | — | Compliant |
| OHIO WATER SERVICE,LEE,MADISON OH4301311 | GENEVA | 1,001 | — | — | Compliant |
| GLANDORF VILLAGE OH6901303 | GLANDORF | 1,001 | — | — | Compliant |
| FAIRBORN-CITY/CENTRAL PARK OH2900622 | FAIRBORN | 1,001 | — | — | Compliant |
| SUPT-SPRINGBORO MILL ST.WTP OH8301422 | SPRINGBORO | 1,001 | — | — | Compliant |
| SUPT,MINGO ESTATES WATER SYS. OH2301612 | PICKERINGTON | 1,000 | — | — | Compliant |
| SEVEN MILE VILLAGE PWS OH0902612 | SEVEN MILE | 1,000 | — | — | Compliant |
| WARREN CO,SOCIALVILLE WAT.AREA OH8302103 | LEBANON | 1,000 | — | — | Compliant |
| BOLIVAR VILLAGE PWS OH7900212 | BOLIVAR | 998 | — | — | Compliant |
| GREENE COUNTY - CLYO PWS OH2904203 | BEAVERCREEK | 996 | — | — | Compliant |
| DANVILLE VILLAGE PWS OH4200112 | DANVILLE | 994 | — | — | 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 PWS OH8700412 | BRADNER | 985 | — | — | Compliant |
| HOPEDALE VILLAGE PWS OH3400811 | HOPEDALE | 984 | — | — | Compliant |
| LAKE LUCERNE CLUB CO. OH2801512 | CHAGRIN FALLS | 980 | — | — | Compliant |
| OTTOVILLE VILLAGE PWS OH6900812 | OTTOVILLE | 976 | — | — | Compliant |
| FARMERSVILLE VILLAGE PWS OH5700912 | BROOKVILLE | 975 | — | — | Compliant |
| PHILO OH6001912 | PHILO | 974 | — | — | Compliant |
| HAMDEN VILLAGE PWS OH8200003 | HAMDEN | 970 | — | — | Compliant |
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