States / Ohio / Drinking Water
Drinking Water Systems in Ohio
1,125 community water systems serving about 10,455,183 people. 314 have a health-based violation on record since 2015, 36 of them unresolved.
SystemHealth-based violations (2015+)
SHERWOOD FOREST MHP PWS · Darke County · 578 served · groundwater8 (8 unresolved)
BIG PRAIRIE COMMUNITY WATER COMPANY · Holmes County · 200 served · groundwater10 (6 unresolved)
MALVERN VILLAGE PWS · Carroll County · 1,200 served · groundwater6 (6 unresolved)
ROCK CREEK VILLAGE · Ashtabula County · 667 served · purchased surface water44 (4 unresolved)
CLEARFORK MHP · Richland County · 318 served · groundwater28 (4 unresolved)
MIDDLEPORT VILLAGE PWS · Meigs County · 2,446 served · groundwater4 (4 unresolved)
WAYNE MHP LP · Warren County · 175 served · groundwater4 (4 unresolved)
GREEN VALLEY MOBILE HOME PARK · Ottawa County · 82 served · groundwater4 (4 unresolved)
WASHINGTONVILLE VILLAGE PWS · Columbiana County · 801 served · purchased surface water19 (3 unresolved)
LAURA VILLAGE PWS · Miami County · 487 served · groundwater10 (3 unresolved)
NASHVILLE VILLAGE PWS · Holmes County · 197 served · groundwater8 (3 unresolved)
WAYNESBURG VILLAGE PWS · Stark County · 928 served · groundwater7 (3 unresolved)
CONCORD CARE CENTER OF HARTFORD · Trumbull County · 99 served · groundwater6 (3 unresolved)
MORROW VILLAGE PWS · Warren County · 3,360 served · groundwater3 (3 unresolved)
CARROLLTON VILLAGE · Carroll County · 3,055 served · groundwater3 (3 unresolved)
NORTHERN PERRY CO.WATER #2 · Perry County · 1,802 served · purchased groundwater3 (3 unresolved)
POMEROY VILLAGE PWS · Meigs County · 1,800 served · groundwater3 (3 unresolved)
HIRAM VILLAGE PWS · Portage County · 1,406 served · groundwater3 (3 unresolved)
NEW MADISON VILLAGE PWS · Darke County · 892 served · groundwater3 (3 unresolved)
COALTON · Jackson County · 663 served · purchased groundwater3 (3 unresolved)
BUCKEYE TRAILS - L · Pickaway County · 400 served · groundwater3 (3 unresolved)
FAYETTEVILLE VILLAGE PWS · Brown County · 309 served · purchased groundwater3 (3 unresolved)
MOUNTAINVIEW MOBILE VILLAGE · Logan County · 300 served · groundwater3 (3 unresolved)
GLENMONT VILLAGE PWS · Holmes County · 280 served · groundwater3 (3 unresolved)
BIRCHWOOD MANOR MHC NEW · Portage County · 150 served · groundwater3 (3 unresolved)
BRIGHTSTAR FREMONT MHP PWS · Sandusky County · 100 served · groundwater3 (3 unresolved)
PRIDE VALLEY MHP · Carroll County · 100 served · groundwater3 (3 unresolved)
TAMMIS MOBILE VILLAGE LTD. PWS · Logan County · 98 served · groundwater3 (3 unresolved)
COMMUNITY GARDENS MHP · Franklin County · 74 served · groundwater3 (3 unresolved)
HOLIDAY SHORES MHP PWS · Logan County · 67 served · groundwater3 (3 unresolved)
TWIN MAPLES MHP · Wood County · 45 served · groundwater3 (3 unresolved)
SCENIC HILLS ESTATES · Hocking County · 32 served · groundwater3 (3 unresolved)
CHARDON ESTATES · Geauga County · 217 served · groundwater6 (2 unresolved)
CRESTON VILLAGE · Wayne County · 2,171 served · groundwater2 (2 unresolved)
BUCKEYE TRAILS - M · Pickaway County · 330 served · purchased groundwater2 (2 unresolved)
CARVEL MANOR MHP · Pickaway County · 148 served · groundwater2 (2 unresolved)
MAYSVILLE REGIONAL WATER · Muskingum County · 6,540 served · purchased groundwater185
BRUNERSBURG WD - EVANSPORT PWS · Defiance County · 268 served · purchased surface water177
DEFIANCE CITY · Defiance County · 16,494 served · surface water126
BYESVILLE · Guernsey County · 5,104 served · groundwater under surface influence118
BRUNERSBURG WD - AIRPORT PWS · Defiance County · 40 served · purchased surface water114
AYERSVILLE WATER AND SEWER DISTRICT · Defiance County · 2,372 served · purchased surface water106
WEST FARMINGTON VILLAGE PWS · Trumbull County · 908 served · purchased surface water106
HAMLER VILLAGE · Henry County · 580 served · groundwater105
HAMDEN VILLAGE PWS · Vinton County · 970 served · purchased groundwater104
GREEN SPRINGS VILLAGE PWS · Seneca County · 1,592 served · purchased surface water76
HOLGATE VILLAGE · Henry County · 1,150 served · groundwater76
ARCHBOLD VILLAGE · Fulton County · 5,586 served · surface water74
NORTHWESTERN W AND SD - CO RD P PWS · Henry County · 440 served · purchased surface water71
NELSONVILLE PWS · Athens County · 6,656 served · groundwater62
ARCADIA VILLAGE PWS · Hancock County · 564 served · purchased surface water62
WAUSEON CITY PWS · Fulton County · 7,568 served · surface water48
NORTHWESTERN W AND SD - MCCOMB · Hancock County · 1,527 served · purchased surface water39
SOUTH VIENNA VILLAGE PWS · Clark County · 393 served · groundwater39
VAN WERT CITY · Van Wert County · 10,846 served · surface water36
NEW LEXINGTON · Perry County · 5,161 served · surface water36
CADIZ VILLAGE PWS · Harrison County · 3,353 served · surface water33
SEBRING VILLAGE PWS · Mahoning County · 6,058 served · surface water31
CONTINENTAL VILLAGE PWS · Putnam County · 1,153 served · groundwater30
MANSFIELD CITY · Richland County · 51,000 served · surface water28
DELTA VILLAGE · Fulton County · 3,518 served · surface water28
GREENLAWN CONDOS · Clark County · 203 served · groundwater28
GALION CITY · Crawford County · 10,453 served · surface water25
OAK HILLS MOBILE HOME PARK · Franklin County · 505 served · groundwater25
NORTHWESTERN W AND SD - SR 108 PWS · Henry County · 267 served · purchased surface water25
BLUFFTON VILLAGE · Allen County · 4,125 served · purchased surface water23
OLD STRAITSVILLE WATER ASSOCIATION · Perry County · 2,950 served · purchased groundwater20
HCWSD-UNIONVALE-KENWOOD · Harrison County · 257 served · purchased surface water20
PAULDING VILLAGE PWS · Paulding County · 3,605 served · surface water19
ATTICA VILLAGE · Seneca County · 1,148 served · surface water19
STEUBENVILLE, CITY OF · Jefferson County · 17,000 served · surface water18
NORTHWESTERN W AND SD - OREGON WTLN 200 · Wood County · 9,629 served · purchased surface water18
CHOCTAW UTILITIES, INC. · Madison County · 2,200 served · groundwater18
GUERNSEY CO. WATER DEPT. · Guernsey County · 8,891 served · purchased surface water17
NORTHWOODS MHC · Miami County · 70 served · groundwater17
WHITEHOUSE VILLAGE · Lucas County · 5,200 served · purchased surface water16
LAGRANGE VILLAGE PWS · Lorain County · 2,400 served · purchased surface water16
CHRISTI WATER SYSTEM INC · Defiance County · 483 served · purchased surface water16
GREEN MEADOWS HEALTH AND WELLNESS CENTER · Stark County · 182 served · groundwater16
ST. LUKE LUTHERAN COMMUNITY - PORTAGE LA · Summit County · 143 served · groundwater16
ALLIANCE CITY PWS · Stark County · 22,232 served · surface water15
BELLEVUE CITY · Huron County · 8,236 served · surface water15
ST. CLAIRSVILLE, CITY OF PWS · Belmont County · 5,097 served · surface water15
WESTVIEW MHP · Wayne County · 450 served · groundwater15
HICKORY GROVE MOBILE HOME COMMUNITY · Champaign County · 70 served · groundwater15
NORTHERN PERRY CO.WATER #1 · Perry County · 1,706 served · purchased groundwater14
EAST CANTON VILLAGE PWS · Stark County · 1,606 served · purchased groundwater14
BUCYRUS CITY · Crawford County · 12,570 served · surface water13
PUT-IN-BAY VILLAGE · Ottawa County · 5,000 served · surface water13
WOODSFIELD VILLAGE PWS · Monroe County · 2,598 served · surface water13
HILLSIDE MHP · Richland County · 69 served · groundwater13
LIMA CITY · Allen County · 65,619 served · surface water12
WESTERVILLE CITY PWS · Franklin County · 39,000 served · surface water12
NORTHWESTERN W AND SD - TOLEDO SVC AREA · Wood County · 19,758 served · purchased surface water12
CAMBRIDGE, CITY OF · Guernsey County · 10,520 served · surface water12
NEWTON FALLS CITY · Trumbull County · 6,109 served · surface water12
MINGO JUNCTION PWS · Jefferson County · 3,350 served · groundwater12
PUTNAM COMMUNITY WATER ASSOCIATION PWS · Washington County · 2,744 served · groundwater12
COLUMBUS GROVE VILLAGE · Putnam County · 2,137 served · groundwater12
NORTHEAST WATER SYSTEM · Fulton County · 1,250 served · purchased surface water12
GLANDORF VILLAGE · Putnam County · 1,001 served · purchased surface water12
OAKWOOD VILLAGE PWS · Paulding County · 727 served · groundwater12
CHARDON WOODS OF JOURNEY · Geauga County · 650 served · groundwater12
BRUNERSBURG WD - BRUNERSBURG PWS · Defiance County · 500 served · purchased surface water12
AQUA OHIO - MANSFIELD SYSTEM #08 · Richland County · 170 served · groundwater12
SPRING VALLEY MOBILE HOME PARK · Crawford County · 160 served · groundwater12
OTTAWA VILLAGE · Putnam County · 4,393 served · surface water11
DALTON VILLAGE PWS · Wayne County · 2,000 served · groundwater10
APPLE CREEK VILLAGE PWS · Wayne County · 1,190 served · groundwater10
ALGER VILLAGE PWS · Hardin County · 943 served · groundwater10
SHAWNEE, VILLAGE OF · Perry County · 605 served · purchased groundwater10
WILLSHIRE VILLAGE PWS · Van Wert County · 405 served · groundwater10
ROCKWOOD PARK · Carroll County · 200 served · groundwater10
BROOK PARK ESTATES MHP PWS · Seneca County · 75 served · groundwater10
PORTAGE COUNTY WATER RESOURCES · Portage County · 8,606 served · groundwater9
LYONS VILLAGE · Fulton County · 562 served · purchased surface water9
WARREN WATER AUTHORITY · Jefferson County · 481 served · purchased groundwater9
WILMOT VILLAGE PWS · Stark County · 325 served · groundwater9
DAYTON VA BLDG 320 POD A · Montgomery County · 95 served · purchased surface water9
COLUMBUS PUBLIC WATER SYSTEM · Franklin County · 1,305,946 served · surface water8
TOLEDO CITY OF · Lucas County · 360,000 served · surface water8
MONTGOMERY COUNTY WATER SERVICES 1 PWS · Montgomery County · 150,207 served · purchased surface water8
MONTGOMERY COUNTY WATER SERVICES 2 PWS · Montgomery County · 83,033 served · purchased surface water8
MID-OHIO WSD - CHRISMAN AVENUE WTP · Madison County · 10,256 served · groundwater8
WRIGHT STATE UNIVERSITY · Greene County · 8,948 served · groundwater8
OBERLIN WATER DEPARTMENT · Lorain County · 8,600 served · surface water8
WELLSTON CITY PWS · Jackson County · 5,846 served · surface water8
NEW LONDON VILLAGE PWS · Huron County · 3,226 served · surface water8
WAYNOKA REGIONAL WATER AND SEWER DIST · Brown County · 2,428 served · surface water8
LEIPSIC VILLAGE · Putnam County · 2,348 served · groundwater8
PURE WATER CORPORATION · Noble County · 1,989 served · purchased surface water8
LEETONIA VILLAGE PWS · Columbiana County · 1,833 served · purchased surface water8
JEFFERSON CO W&S DISTRICT- J · Jefferson County · 896 served · purchased groundwater8
ECHO LAKE COMMUNITY ASSOCIATION · Medina County · 58 served · groundwater8
AKRON CITY PWS · Summit County · 280,000 served · surface water7
CELINA, CITY OF · Mercer County · 11,682 served · surface water7
SWANTON VILLAGE · Fulton County · 3,855 served · surface water7
FRESH MEADOWS PWS · Stark County · 100 served · groundwater7
HIDDEN VALLEY MHP PWS · Shelby County · 85 served · groundwater7
CHRISTIAN CHILDRENS HOME · Wayne County · 55 served · groundwater7
STOW PUBLIC WATER SYSTEM · Summit County · 35,437 served · purchased surface water6
IRONTON · Lawrence County · 11,129 served · surface water6
BUCKEYE WATER DISTRICT - OHIO RIVER · Columbiana County · 10,300 served · surface water6
JACKSON, CITY OF · Jackson County · 9,691 served · surface water6
WEST JEFFERSON VILLAGE PWS · Madison County · 4,488 served · groundwater6
BETHEL VILLAGE PWS · Clermont County · 2,620 served · purchased groundwater6
MANCHESTER VILLAGE · Adams County · 2,043 served · groundwater6
GLOUSTER PUBLIC WATER SYSTEM · Athens County · 1,659 served · purchased groundwater6
NEWPORT WATER/SEWER DISTRICT PWS · Washington County · 1,582 served · groundwater6
SCIO PWS · Harrison County · 690 served · groundwater6
HOLLOWAY PUBLIC WATER SYSTEM · Belmont County · 360 served · groundwater6
SKYLAND HILLS MHP · Stark County · 273 served · groundwater6
LEONARD PARK PWS · Franklin County · 266 served · purchased surface water6
EVERGREEN POPLAR VILLAGE MHP PWS · Seneca County · 128 served · groundwater6
GRAND LAKE ESTATES · Mercer County · 103 served · groundwater6
COTTONWOOD ENTERPRISES · Logan County · 30 served · groundwater6
ELYRIA WATER DEPARTMENT · Lorain County · 68,000 served · surface water5
CUYAHOGA FALLS CITY PWS · Summit County · 51,114 served · groundwater5
XENIA CITY PWS · Greene County · 29,000 served · groundwater5
BELMONT CO. SANITARY DISTRICT 3 PWS · Belmont County · 26,822 served · groundwater5
URBANA CITY PWS · Champaign County · 11,428 served · groundwater5
ST MARYS CITY · Auglaize County · 9,356 served · groundwater5
CHILLICOTHE CORRECTIONAL INSTITUTION · Ross County · 9,000 served · groundwater5
SANITARY DISTRICT #4 · Franklin County · 8,575 served · purchased surface water5
HUDSON CITY PWS · Summit County · 8,385 served · groundwater5
WEST CARROLLTON CITY PWS · Montgomery County · 8,361 served · groundwater5
WILLARD CITY · Huron County · 7,099 served · surface water5
LEADING CREEK CONSERVANCY DISTRICT · Meigs County · 6,663 served · groundwater5
BELPRE CITY PWS · Washington County · 6,441 served · groundwater5
GRANVILLE, VILLAGE OF · Licking County · 5,946 served · groundwater5
TORONTO PWS · Jefferson County · 5,676 served · surface water5
MONROE WATER SYSTEMS · Monroe County · 4,334 served · groundwater5
MONTPELIER VILLAGE · Williams County · 4,280 served · groundwater5
WEST UNION PUBLIC WATER SYSTEM · Adams County · 3,170 served · purchased groundwater5
OBETZ VILLAGE PWS · Franklin County · 3,167 served · groundwater5
LOUDONVILLE VILLAGE · Ashland County · 2,641 served · groundwater5
SABINA VILLAGE PWS · Clinton County · 2,564 served · groundwater5
SEVILLE VILLAGE PWS · Medina County · 2,296 served · groundwater5
UTICA VILLAGE PWS · Licking County · 2,235 served · groundwater5
RICHWOOD VILLAGE PWS · Union County · 2,200 served · groundwater5
ARCANUM VILLAGE PWS · Darke County · 2,100 served · groundwater5
BRILLIANT WATER AND SEWER · Jefferson County · 2,000 served · groundwater5
SOUTH BLOOMFIELD VILLAGE PWS · Pickaway County · 1,999 served · groundwater5
LITHOPOLIS VILLAGE PWS · Fairfield County · 1,573 served · groundwater5
OTTERBEIN-LEBANON RETREAT CENTER · Warren County · 1,541 served · groundwater5
WEST ALEXANDRIA, VILLAGE OF · Preble County · 1,385 served · groundwater5
JEFFERSONVILLE VILLAGE PWS · Fayette County · 1,356 served · groundwater5
FOREST VILLAGE · Hardin County · 1,354 served · groundwater5
WALNUT CREEK WATER CO. · Holmes County · 1,270 served · groundwater5
WILLIAMSPORT VILLAGE PWS · Pickaway County · 1,038 served · groundwater5
HOPEDALE VILLAGE PWS · Harrison County · 984 served · purchased surface water5
KILLBUCK VILLAGE PWS · Holmes County · 950 served · groundwater5
ALBANY VILLAGE PWS · Athens County · 901 served · purchased groundwater5
WAYNESFIELD VILLAGE PWS · Auglaize County · 831 served · groundwater5
SYRACUSE VILLAGE PWS · Meigs County · 826 served · groundwater5
WATERFORD WATER/SEWER ASSOCIATION · Washington County · 770 served · groundwater5
MCGUFFEY VILLAGE PWS · Hardin County · 710 served · groundwater5
LAKE SHERMAN VILLAGE PWS · Stark County · 563 served · groundwater5
STOCKPORT VILLAGE PWS · Morgan County · 503 served · groundwater5
BROOKSIDE VILLAGE MHP PWS · Clark County · 475 served · groundwater5
FOHL VILLAGE MHP · Stark County · 440 served · groundwater5
MOUNT EATON VILLAGE PWS · Wayne County · 425 served · groundwater5
RAYLAND VILLAGE PWS · Jefferson County · 417 served · purchased groundwater5
COLLEGE CORNER WATER · Preble County · 387 served · purchased groundwater5
OLD STRAITSVILLE-ROCKBRIDGE · Hocking County · 361 served · purchased groundwater5
ZALESKI VILLAGE PWS · Vinton County · 360 served · groundwater5
RUSHVILLE VILLAGE PWS · Fairfield County · 357 served · purchased groundwater5
STRATTON PWS · Jefferson County · 320 served · groundwater5
DARBYVILLE VILLAGE PWS · Pickaway County · 293 served · groundwater5
LOCKBOURNE VILLAGE PWS · Franklin County · 275 served · purchased surface water5
DUNFALLS ASSOCIATION, INC. · Muskingum County · 266 served · purchased groundwater5
HOLLY HILL HEALTH CARE RESIDENCE · Geauga County · 202 served · groundwater5
INTERVAL BROTHERHOOD HOME · Summit County · 136 served · groundwater5
DAYTON VA BLDG 410 · Montgomery County · 125 served · purchased surface water5
GLENRIDGE MOBILE HOME PARK · Wayne County · 120 served · groundwater5
PAW PAW LAKE · Geauga County · 120 served · groundwater5
WESTERN RESERVE VILLAGE · Summit County · 120 served · groundwater5
GREEN ACRES MOBILE ESTATES · Carroll County · 51 served · groundwater5
ISLAND CREEK HOMEOWNERS · Mahoning County · 50 served · groundwater5
TOP O HILL MHP PWS · Stark County · 50 served · groundwater5
LAFFERTY LEISURE VILLAGE · Wood County · 40 served · groundwater5
COMET MOBILE HOME PARK · Summit County · 25 served · groundwater5
CLERMONT PUBLIC WATER SYSTEM · Clermont County · 133,059 served · surface water4
YOUNGSTOWN CITY PWS · Mahoning County · 130,530 served · purchased surface water4
BARBERTON CITY · Summit County · 31,298 served · surface water4
MUSKINGUM COUNTY WATER - SE · Muskingum County · 21,540 served · groundwater4
SIDNEY CITY PWS · Shelby County · 20,614 served · surface water4
PIQUA CITY PWS · Miami County · 20,354 served · surface water4
BEREA CITY PWS · Cuyahoga County · 18,789 served · surface water4
ASHTABULA COUNTY WATER SYSTEM · Ashtabula County · 14,757 served · purchased surface water4
CIRCLEVILLE CITY PWS · Pickaway County · 13,927 served · groundwater4
GREENVILLE CITY PWS · Darke County · 13,227 served · surface water4
VERMILION CITY · Erie County · 10,594 served · surface water4
BELLBROOK WATER WORKS · Greene County · 9,475 served · groundwater4
NAPOLEON CITY · Henry County · 8,858 served · surface water4
HUBBARD CITY PWS · Trumbull County · 8,518 served · purchased surface water4
KENTON CITY · Hardin County · 8,360 served · groundwater4
AQUA OHIO - LAWRENCE COUNTY · Lawrence County · 8,130 served · purchased surface water4
CORTLAND CITY PWS · Trumbull County · 7,105 served · groundwater4
MID-OHIO WSD - OLD SPRINGFIELD ROAD WTP · Madison County · 5,176 served · groundwater4
WELLINGTON VILLAGE PWS · Lorain County · 4,802 served · surface water4
BLANCHESTER VILLAGE PWS · Clinton County · 4,243 served · surface water4
WAYNESVILLE VILLAGE PWS · Warren County · 4,100 served · groundwater4
AQUA OHIO - MASURY · Trumbull County · 4,019 served · purchased surface water4
LORDSTOWN VILLAGE PWS · Trumbull County · 3,515 served · purchased surface water4
LOCKLAND VILLAGE PWS · Hamilton County · 3,486 served · groundwater4
ODRC-PICKAWAY CORRECTION PWS · Pickaway County · 3,376 served · groundwater4
GENOA VILLAGE · Ottawa County · 3,110 served · purchased surface water4
BUCKEYE LAKE, VILLAGE OF PWS · Licking County · 2,746 served · purchased groundwater4
CROOKSVILLE · Perry County · 2,534 served · purchased groundwater4
WILLIAMSBURG VILLAGE PWS · Clermont County · 2,490 served · purchased surface water4
CARROLL WATER AND SEWER · Ottawa County · 2,288 served · surface water4
SUGARCREEK VILLAGE PWS · Tuscarawas County · 2,220 served · groundwater4
AQUA OHIO - MIDVALE · Tuscarawas County · 2,147 served · groundwater4
WEST LIBERTY VILLAGE PWS · Logan County · 1,800 served · groundwater4
NEW PARIS VILLAGE PWS · Preble County · 1,681 served · groundwater4
TIMBERLAKE WATER SYSTEM · Franklin County · 1,600 served · groundwater4
OAKWOOD VILLAGE MHP · Montgomery County · 1,500 served · purchased surface water4
GREENWICH VILLAGE PWS · Huron County · 1,476 served · groundwater4
BETHESDA PUBLIC WATER SYSTEM · Belmont County · 1,382 served · purchased groundwater4
MILAN VILLAGE PWS · Erie County · 1,371 served · purchased surface water4
PEMBERVILLE VILLAGE PWS · Wood County · 1,326 served · groundwater4
ROCKFORD VILLAGE · Mercer County · 1,120 served · groundwater4
KINGSTON VILLAGE PWS · Ross County · 1,032 served · purchased groundwater4
YORKVILLE VILLAGE PWS · Jefferson County · 1,019 served · purchased groundwater4
ADDYSTON VILLAGE PWS · Hamilton County · 900 served · groundwater4
MARBLEHEAD VILLAGE · Ottawa County · 865 served · purchased surface water4
COOLVILLE VILLAGE PWS · Athens County · 859 served · purchased groundwater4
TRUMBULL CO. - BRACEVILLE TWP PWS · Trumbull County · 835 served · purchased surface water4
AQUA OHIO - LA RUE VILLAGE PWS · Marion County · 800 served · groundwater4
BETTSVILLE VILLAGE · Seneca County · 692 served · groundwater4
SUBURBANS COMMUNITY MHP · Madison County · 655 served · groundwater4
JEWETT VILLAGE · Harrison County · 650 served · groundwater4
LAURELVILLE, VLG OF · Hocking County · 586 served · groundwater4
RUSHSYLVANIA VILLAGE PWS · Logan County · 551 served · groundwater4
FOX RUN ESTATES PWS · Portage County · 495 served · groundwater4
MOUNT PLEASANT PWS · Jefferson County · 450 served · groundwater4
MIDDLEFIELD MOBILE HOME PARK · Geauga County · 400 served · groundwater4
SOUTH SOLON VILLAGE PWS · Madison County · 395 served · groundwater4
SHOREWOOD VILLAGE SUBDIVISION · Sandusky County · 359 served · groundwater4
AQUA OHIO - NORLICK · Williams County · 345 served · groundwater4
PURE WATER SYSTEM 2 PWS · Noble County · 279 served · purchased surface water4
NELSON LEDGES ESTATES MHP · Portage County · 231 served · groundwater4
SWANTON MEADOWS · Fulton County · 180 served · groundwater4
BLACKBROOK VALLEY ESTATES · Portage County · 180 served · groundwater4
SOUTHERN PERRY CO-IRISH RIDGE · Perry County · 98 served · purchased groundwater4
DFC MOBILE HOME PARK · Ashtabula County · 85 served · groundwater4
GREEN ACRES MHP · Ashland County · 80 served · groundwater4
WOODLAND HILLS ESTATES II · Morgan County · 70 served · groundwater4
PREMIER PARK ESTATES LLC · Columbiana County · 60 served · groundwater4
SUBURBAN MOBILE HOME PARK · Licking County · 53 served · groundwater4
AUBURN SKILLED NURSING & REHABILITATION · Columbiana County · 50 served · groundwater4
NORTHLAND SENIOR COMMUNITY · Williams County · 50 served · groundwater4
BRUNSWICK HILLS MHP · Medina County · 50 served · groundwater4
BOMAC MOBILE HOME PARK · Coshocton County · 45 served · groundwater4
SPRINGWATER GARDENS CONDOMINIUMS PWS · Stark County · 41 served · groundwater4
BEAVER CREEK ESTATES · Geauga County · 39 served · groundwater4
MCCARTNEY MOBILE ESTATES MHP 2 · Mahoning County · 31 served · groundwater4
ECHOING HILLS VILLAGE · Coshocton County · 25 served · groundwater4
MCCARTNEY MOBILE ESTATES MHP 1 · Mahoning County · 25 served · groundwater4
CONNEAUT · Ashtabula County · 12,538 served · surface water3
WAVERLY CITY PWS · Pike County · 4,433 served · groundwater3
MCDONALD VILLAGE PWS · Trumbull County · 4,236 served · purchased surface water3
FAIRPORT HARBOR VILLAGE PWS · Lake County · 3,180 served · purchased surface water3
NEY VILLAGE · Defiance County · 854 served · groundwater3
ADENA VILLAGE PWS · Jefferson County · 820 served · purchased groundwater3
FOSTORIA MOBILE ESTATES · Seneca County · 281 served · groundwater3
BELLEFONTAINE CITY PWS · Logan County · 13,249 served · groundwater2
RACINE VILLAGE PWS · Meigs County · 675 served · groundwater2
CHATEAU ESTATES MHP PWS · Clark County · 430 served · groundwater2
HONEY CREEK VILLAGE MHP PWS · Clark County · 225 served · groundwater2
QUARRY LAKES MHP LLC · Montgomery County · 141 served · groundwater2
BEECHWOOD ISLAND ESTATES · Portage County · 122 served · groundwater2
DEERSVILLE VILLAGE PWS · Harrison County · 82 served · groundwater2
CLEVELAND PUBLIC WATER SYSTEM · Cuyahoga County · 1,308,955 served · surface waternone on record
CINCINNATI PUBLIC WATER SYSTEM · Hamilton County · 750,200 served · surface waternone on record
DEL-CO WATER COMPANY, INC. · Delaware County · 150,000 served · surface waternone on record
DAYTON PUBLIC WATER SYSTEM · Montgomery County · 141,407 served · surface waternone on record
BUTLER CO. WATER DISTRICT 2 PWS · Butler County · 116,572 served · purchased surface waternone on record
CANTON PUBLIC WATER SYSTEM · Stark County · 107,113 served · groundwaternone on record
AQUA OHIO - MASSILLON PWS · Stark County · 95,636 served · groundwaternone on record
WARREN COUNTY · Warren County · 81,975 served · groundwaternone on record
LAKE COUNTY WEST WATER SUBDISTRICT · Lake County · 78,379 served · surface waternone on record
AQUA OHIO - MENTOR · Lake County · 74,500 served · surface waternone on record
RURAL LORAIN CO. WATER A · Lorain County · 73,125 served · purchased surface waternone on record
LORAIN CITY PWS · Lorain County · 64,152 served · surface waternone on record
HAMILTON PUBLIC WATER SYSTEM · Butler County · 62,447 served · groundwaternone on record
SPRINGFIELD CITY PWS · Clark County · 60,680 served · groundwaternone on record
AQUA OHIO - STRUTHERS · Mahoning County · 58,551 served · surface waternone on record
FINDLAY CITY PWS · Hancock County · 54,040 served · surface waternone on record
MIDDLETOWN CITY PWS · Butler County · 51,229 served · groundwaternone on record
LAKEWOOD CITY PWS · Cuyahoga County · 50,942 served · purchased surface waternone on record
NEWARK CITY PWS · Licking County · 49,934 served · surface waternone on record
WARREN CITY PWS · Trumbull County · 49,130 served · surface waternone on record
AQUA OHIO - MARION · Marion County · 47,102 served · surface waternone on record
MEDINA CO/NORTHWEST PWS · Medina County · 46,324 served · purchased surface waternone on record
FAIRFIELD CITY PWS · Butler County · 44,907 served · groundwaternone on record
DELAWARE CITY PWS · Delaware County · 43,895 served · surface waternone on record
HUBER HEIGHTS PUBLIC WATER SYSTEM · Montgomery County · 43,439 served · groundwaternone on record
SOUTHWEST REGIONAL WATER DISTRICT · Butler County · 42,856 served · groundwaternone on record
GREENE CO.-NORTHWEST REG WATER · Greene County · 41,895 served · groundwaternone on record
LAKE COUNTY EAST WATER SUBDISTRICT · Lake County · 40,656 served · surface waternone on record
PORTSMOUTH CITY · Scioto County · 40,475 served · surface waternone on record
LANCASTER CITY PWS · Fairfield County · 40,400 served · groundwaternone on record
WESTERN WATER COMPANY · Warren County · 39,508 served · purchased surface waternone on record
REYNOLDSBURG CITY PWS · Franklin County · 37,847 served · purchased surface waternone on record
ROSS COUNTY WATER CO INC · Ross County · 35,345 served · groundwaternone on record
HECLA WATER ASSOCIATION · Lawrence County · 34,942 served · purchased surface waternone on record
FAIRBORN PUBLIC WATER SYSTEM · Greene County · 34,620 served · groundwaternone on record
GAHANNA CITY PWS · Franklin County · 33,258 served · purchased surface waternone on record
ATHENS PWS · Athens County · 32,725 served · groundwaternone on record
AQUA OHIO - ASHTABULA · Ashtabula County · 32,342 served · surface waternone on record
BROWN COUNTY RURAL WATER · Brown County · 32,090 served · groundwaternone on record
PAINESVILLE CITY PWS · Lake County · 31,728 served · surface waternone on record
BOWLING GREEN CITY · Wood County · 31,578 served · surface waternone on record
NAWA · Miami County · 29,974 served · groundwaternone on record
KENT CITY PWS · Portage County · 29,662 served · groundwaternone on record
NORTH RIDGEVILLE CITY PWS · Lorain County · 29,465 served · purchased surface waternone on record
ZANESVILLE PWS · Muskingum County · 29,381 served · groundwaternone on record
HIGHLAND COUNTY WATER COMPANY, INC. · Highland County · 28,421 served · groundwaternone on record
PERRYSBURG CITY PWS · Wood County · 27,000 served · purchased surface waternone on record
WOOSTER CITY PWS · Wayne County · 26,618 served · groundwaternone on record
TROY CITY PWS · Miami County · 26,305 served · groundwaternone on record
MEDINA CITY PWS · Medina County · 25,956 served · purchased surface waternone on record
SANDUSKY CITY · Erie County · 25,793 served · surface waternone on record
MARYSVILLE CITY PWS · Union County · 25,571 served · surface waternone on record
NORTH CANTON CITY PWS · Stark County · 24,747 served · groundwaternone on record
WADSWORTH CITY PWS · Medina County · 24,356 served · groundwaternone on record
TATE-MONROE WATER ASSOCIATION PWS · Clermont County · 24,092 served · groundwaternone on record
OXFORD CITY PWS · Butler County · 24,000 served · groundwaternone on record
AVON CITY PWS · Lorain County · 23,800 served · purchased surface waternone on record
AVON LAKE CITY PWS · Lorain County · 23,659 served · surface waternone on record
NILES CITY PWS · Trumbull County · 21,961 served · purchased surface waternone on record
ADAMS COUNTY REGIONAL WD PWS · Adams County · 21,810 served · groundwaternone on record
CHILLICOTHE CITY PWS · Ross County · 21,725 served · groundwaternone on record
SYLVANIA CITY · Lucas County · 21,618 served · purchased surface waternone on record
GALLIA CO RURAL WATER ASSOCIATION · Gallia County · 20,995 served · groundwaternone on record
LEBANON CITY · Warren County · 20,700 served · purchased surface waternone on record
ASHLAND CITY · Ashland County · 20,648 served · groundwaternone on record
OTTAWA COUNTY REGIONAL WATER DISTRICT · Ottawa County · 20,428 served · surface waternone on record
AQUA OHIO - TIFFIN · Seneca County · 20,279 served · surface waternone on record
OREGON CITY · Lucas County · 19,950 served · surface waternone on record
NORWOOD CITY PWS · Hamilton County · 19,870 served · purchased surface waternone on record
MIAMISBURG CITY PWS · Montgomery County · 19,790 served · groundwaternone on record
LE-AX REGIONAL WATER DISTRICT PWS · Athens County · 19,311 served · groundwaternone on record
SPRINGBORO PWS · Warren County · 19,263 served · groundwaternone on record
PICKERINGTON CITY PWS · Fairfield County · 19,141 served · groundwaternone on record
MARIETTA CITY PWS · Washington County · 18,707 served · groundwaternone on record
TALLMADGE CITY PWS · Summit County · 18,394 served · purchased surface waternone on record
FREMONT CITY · Sandusky County · 18,319 served · surface waternone on record
NORTHERN OHIO RURAL WATER · Huron County · 18,224 served · purchased surface waternone on record
LICKING REGIONAL WATER DISTRICT · Licking County · 17,818 served · groundwaternone on record
NORWALK CITY PWS · Huron County · 17,466 served · surface waternone on record
NEW PHILADELPHIA CITY PWS · Tuscarawas County · 17,410 served · groundwaternone on record
ERIE CO PERKINS DISTRICT · Erie County · 17,241 served · purchased surface waternone on record
MOUNT VERNON CITY PWS · Knox County · 16,990 served · groundwaternone on record
SALEM CITY · Columbiana County · 16,850 served · surface waternone on record
WRIGHT-PATTERSON AFB AREA A PWS · Greene County · 16,551 served · groundwaternone on record
TUPPERS PLAINS/CHESTER WATER DISTRICT · Meigs County · 16,087 served · groundwaternone on record
RAVENNA CITY PWS · Portage County · 16,000 served · surface waternone on record
JACKSON CO. WATER COMPANY-WTP · Jackson County · 15,984 served · groundwaternone on record
AURORA CITY - CLEVELAND PWS · Portage County · 15,852 served · purchased surface waternone on record
MONROE CITY PWS · Butler County · 15,600 served · purchased surface waternone on record
PIKE WATER, INC.-PLANT PWS · Pike County · 15,487 served · groundwaternone on record
FAIRFIELD COUNTY UTILITIES PWS · Fairfield County · 15,486 served · groundwaternone on record
STREETSBORO CITY PWS · Portage County · 15,105 served · purchased groundwaternone on record
INDIAN HILL CITY PWS · Hamilton County · 15,000 served · groundwaternone on record
MAUMEE CITY · Lucas County · 14,286 served · purchased surface waternone on record
BEXLEY CITY PWS · Franklin County · 14,250 served · purchased surface waternone on record
GIRARD CITY · Trumbull County · 14,122 served · purchased surface waternone on record
WASHINGTON COURT HOUSE PWS · Fayette County · 14,100 served · surface waternone on record
JEFFERSON CO W AND S DISTRICT - M · Jefferson County · 13,983 served · purchased surface waternone on record
SCIOTO CO. REGIONAL WATER DISTRICT #1 · Scioto County · 13,820 served · groundwaternone on record
COSHOCTON PWS · Coshocton County · 13,537 served · groundwaternone on record
ENGLEWOOD CITY PWS · Montgomery County · 13,463 served · groundwaternone on record
FOSTORIA CITY · Seneca County · 13,441 served · surface waternone on record
DOVER CITY PWS · Tuscarawas County · 13,253 served · groundwaternone on record
WARREN CO. SOCIALVILLE PWS · Warren County · 13,216 served · purchased surface waternone on record
BEDFORD CITY PWS · Cuyahoga County · 13,149 served · purchased surface waternone on record
TRENTON CITY PWS · Butler County · 13,012 served · groundwaternone on record
LOVELAND CITY PWS · Clermont County · 12,800 served · groundwaternone on record
EAST LIVERPOOL CITY · Columbiana County · 12,586 served · surface waternone on record
WILMINGTON CITY PWS · Clinton County · 12,401 served · surface waternone on record
AMHERST CITY PWS · Lorain County · 11,797 served · purchased surface waternone on record
FRANKLIN PUBLIC WATER SYSTEM · Warren County · 11,690 served · groundwaternone on record
HARRISON CITY PWS · Hamilton County · 11,600 served · groundwaternone on record
JEFFERSON WATER AND SEWER DISTRICT PWS · Franklin County · 11,294 served · groundwaternone on record
NORTHWEST REGIONAL WATER DISTRICT · Scioto County · 11,059 served · purchased groundwaternone on record
WRIGHT-PATTERSON AFB AREA B PWS · Greene County · 11,034 served · groundwaternone on record
WAPAKONETA CITY PWS · Auglaize County · 11,000 served · groundwaternone on record
CITY OF HEATH PWS · Licking County · 10,310 served · groundwaternone on record
EARNHART HILL WATER DISTRICT PWS · Pickaway County · 10,057 served · groundwaternone on record
TRUMBULL CO. - SOUTHEAST PWS · Trumbull County · 9,931 served · purchased surface waternone on record
PATASKALA CITY · Licking County · 9,900 served · groundwaternone on record
LITTLE HOCKING WATER ASSOCIATION, INC. · Washington County · 9,892 served · groundwaternone on record
WYOMING CITY PWS · Hamilton County · 9,700 served · groundwaternone on record
OAKWOOD CITY PWS · Montgomery County · 9,572 served · groundwaternone on record
READING CITY PWS · Hamilton County · 9,506 served · purchased surface waternone on record
SHELBY CITY · Richland County · 9,453 served · surface waternone on record
CANAL WINCHESTER CITY PWS · Franklin County · 9,286 served · groundwaternone on record
TWIN CITY WATER AND SEWER DISTRICT PWS · Tuscarawas County · 9,224 served · groundwaternone on record
LOUISVILLE CITY PWS · Stark County · 9,186 served · groundwaternone on record
SHEFFIELD LAKE CITY PWS · Lorain County · 9,108 served · purchased surface waternone on record
TROTWOOD CITY PWS · Montgomery County · 9,000 served · purchased surface waternone on record
CLARK COUNTY NORTHRIDGE PWS · Clark County · 8,874 served · purchased groundwaternone on record
SCIOTO WATER INC.-ROSE HILL · Scioto County · 8,861 served · groundwaternone on record
BRYAN CITY PWS · Williams County · 8,729 served · groundwaternone on record
ORRVILLE CITY PWS · Wayne County · 8,452 served · groundwaternone on record
EATON PUBLIC WATER SYSTEM · Preble County · 8,400 served · groundwaternone on record
TRUMBULL CO. - BAZETTA/CHAMPION · Trumbull County · 8,270 served · purchased surface waternone on record
KNOX COUNTY WATER AND WASTEWATER PWS · Knox County · 7,710 served · groundwaternone on record
CANFIELD CITY PWS · Mahoning County · 7,706 served · purchased surface waternone on record
RATTLESNAKE PWS · Fayette County · 7,685 served · surface waternone on record
WARREN COMM W AND S ASSN 2 · Washington County · 7,215 served · groundwaternone on record
GALLIPOLIS PWS · Gallia County · 7,134 served · groundwaternone on record
DELPHOS CITY · Allen County · 7,101 served · surface waternone on record
AQUA OHIO - BLACKLICK · Franklin County · 7,100 served · groundwaternone on record
UNION CITY PWS · Montgomery County · 7,000 served · groundwaternone on record
MARTINS FERRY PUBLIC WATER SYSTEM · Belmont County · 6,980 served · groundwaternone on record
HURON CITY · Erie County · 6,893 served · surface waternone on record
ONTARIO CITY · Richland County · 6,756 served · groundwaternone on record
COLUMBIANA CITY PWS · Columbiana County · 6,727 served · groundwaternone on record
LOGAN, CITY OF · Hocking County · 6,704 served · groundwaternone on record
MILFORD CITY PWS · Clermont County · 6,700 served · groundwaternone on record
UPPER SANDUSKY CITY · Wyandot County · 6,698 served · surface waternone on record
STARK COUNTY WATER DISTRICT · Stark County · 6,690 served · purchased groundwaternone on record
HILLSBORO CITY · Highland County · 6,650 served · surface waternone on record
MOUNT ORAB VILLAGE PWS · Brown County · 6,607 served · surface waternone on record
TCMSD-WILKSHIRE HILLS PWS · Tuscarawas County · 6,587 served · groundwaternone on record
WATERVILLE CITY · Lucas County · 6,500 served · purchased surface waternone on record
BARNESVILLE · Belmont County · 6,500 served · surface waternone on record
PORT CLINTON CITY · Ottawa County · 6,500 served · purchased surface waternone on record
RITTMAN CITY PWS · Wayne County · 6,491 served · groundwaternone on record
SCIOTO WATER INC.-SUGAR CAMP · Scioto County · 6,458 served · groundwaternone on record
NORTHERN OHIO RURAL WATER - NW DISTRICT · Erie County · 6,409 served · purchased surface waternone on record
TRUMBULL CO. - HOWLAND TWP PWS · Trumbull County · 6,396 served · purchased surface waternone on record
CLYDE CITY · Sandusky County · 6,325 served · surface waternone on record
ANDOVER-CAMPLANDS WATER · Ashtabula County · 6,009 served · groundwaternone on record
CLEVES VILLAGE PWS · Hamilton County · 6,000 served · groundwaternone on record
GENEVA CITY PWS · Ashtabula County · 5,924 served · purchased surface waternone on record
BROOKVILLE MUNICIPALITY PWS · Montgomery County · 5,923 served · purchased surface waternone on record
NEW CARLISLE CITY PWS · Clark County · 5,800 served · groundwaternone on record
GERMANTOWN CITY PWS · Montgomery County · 5,547 served · groundwaternone on record
SUNDAY CREEK VALLEY WATER PWS · Athens County · 5,451 served · purchased groundwaternone on record
AQUA OHIO - HUBER RIDGE PWS · Franklin County · 5,393 served · groundwaternone on record
ADA VILLAGE · Hardin County · 5,334 served · groundwaternone on record
CANAL FULTON CITY PWS · Stark County · 5,323 served · groundwaternone on record
CHARDON CITY PWS · Geauga County · 5,247 served · groundwaternone on record
NORTHERN OHIO RURAL WATER-SOUTH DISTRICT · Huron County · 5,226 served · purchased surface waternone on record
JOHNSTOWN CITY PWS · Licking County · 5,200 served · groundwaternone on record
ERIE CO MARGARETTA DISTRICT · Erie County · 5,131 served · purchased surface waternone on record
MUNROE FALLS CITY PWS · Summit County · 5,042 served · purchased groundwaternone on record
CHAGRIN FALLS VILLAGE PWS · Cuyahoga County · 4,991 served · purchased surface waternone on record
WEST MILTON VILLAGE PWS · Miami County · 4,890 served · purchased groundwaternone on record
LEXINGTON VILLAGE · Richland County · 4,825 served · groundwaternone on record
JEFFERSON REGIONAL WATER AUTHORITY · Montgomery County · 4,813 served · groundwaternone on record
GREENE COUNTY EASTERN REGIONAL PWS · Greene County · 4,800 served · purchased groundwaternone on record
NORTHWESTERN W AND SD - PORTAGE · Wood County · 4,776 served · purchased surface waternone on record
COLDWATER VILLAGE · Mercer County · 4,774 served · groundwaternone on record
EAST PALESTINE VILLAGE PWS · Columbiana County · 4,761 served · groundwaternone on record
Source: U.S. EPA Safe Drinking Water Information System (SDWIS). "Health-based" counts maximum-contaminant-level, treatment-technique and maximum-residual-disinfectant-level violations recorded since 2015. A violation on record — especially a resolved one — is not a statement about water quality today; contact the water system or your state drinking-water program for current information.