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Employer directory · Ohio

Public water systems in Ohio

243 public water systems in Ohio, 11th among the states. Community drinking-water systems owned by a local, state or federal government and serving 3,301 people or more, from EPA's Safe Drinking Water Information System. Private and tribal systems are not included.

Public water systemPopulation served
CLEVELAND PUBLIC WATER SYSTEM1,308,955
COLUMBUS PUBLIC WATER SYSTEM1,305,946
CINCINNATI PUBLIC WATER SYSTEM750,200
TOLEDO CITY OF360,000
AKRON CITY PWS280,000
MONTGOMERY COUNTY WATER SERVICES 1 PWS150,207
DAYTON PUBLIC WATER SYSTEM141,407
YOUNGSTOWN CITY PWS130,530
BUTLER CO. WATER DISTRICT 2 PWS116,572
CANTON PUBLIC WATER SYSTEM107,113
MONTGOMERY COUNTY WATER SERVICES 2 PWS83,033
WARREN COUNTY81,975
LAKE COUNTY WEST WATER SUBDISTRICT78,379
RURAL LORAIN CO. WATER A73,125
ELYRIA WATER DEPARTMENT68,000
LIMA CITY65,619
LORAIN CITY PWS64,152
HAMILTON PUBLIC WATER SYSTEM62,447
SPRINGFIELD CITY PWS60,680
FINDLAY CITY PWS54,040
MIDDLETOWN CITY PWS51,229
CUYAHOGA FALLS CITY PWS51,114
MANSFIELD CITY51,000
LAKEWOOD CITY PWS50,942
NEWARK CITY PWS49,934
WARREN CITY PWS49,130
MEDINA CO/NORTHWEST PWS46,324
FAIRFIELD CITY PWS44,907
DELAWARE CITY PWS43,895
GREENE CO.-NORTHWEST REG WATER41,895
LAKE COUNTY EAST WATER SUBDISTRICT40,656
PORTSMOUTH CITY40,475
LANCASTER CITY PWS40,400
WESTERVILLE CITY PWS39,000
REYNOLDSBURG CITY PWS37,847
GAHANNA CITY PWS33,258
BROWN COUNTY RURAL WATER32,090
PAINESVILLE CITY PWS31,728
BOWLING GREEN CITY31,578
BARBERTON CITY31,298
KENT CITY PWS29,662
NORTH RIDGEVILLE CITY PWS29,465
XENIA CITY PWS29,000
PERRYSBURG CITY PWS27,000
BELMONT CO. SANITARY DISTRICT 3 PWS26,822
WOOSTER CITY PWS26,618
TROY CITY PWS26,305
MEDINA CITY PWS25,956
SANDUSKY CITY25,793
MARYSVILLE CITY PWS25,571
NORTH CANTON CITY PWS24,747
WADSWORTH CITY PWS24,356
OXFORD CITY PWS24,000
AVON CITY PWS23,800
AVON LAKE CITY PWS23,659
ALLIANCE CITY PWS22,232
NILES CITY PWS21,961
ADAMS COUNTY REGIONAL WD PWS21,810
CHILLICOTHE CITY PWS21,725
SYLVANIA CITY21,618
LEBANON CITY20,700
ASHLAND CITY20,648
SIDNEY CITY PWS20,614
OTTAWA COUNTY REGIONAL WATER DISTRICT20,428
PIQUA CITY PWS20,354
OREGON CITY19,950
NORWOOD CITY PWS19,870
MIAMISBURG CITY PWS19,790
NORTHWESTERN W AND SD - TOLEDO SVC AREA19,758
PICKERINGTON CITY PWS19,141
BEREA CITY PWS18,789
MARIETTA CITY PWS18,707
TALLMADGE CITY PWS18,394
FREMONT CITY18,319
NORTHERN OHIO RURAL WATER18,224
NEW PHILADELPHIA CITY PWS17,410
ERIE CO PERKINS DISTRICT17,241
STEUBENVILLE, CITY OF17,000
SALEM CITY16,850
DEFIANCE CITY16,494
RAVENNA CITY PWS16,000
AURORA CITY - CLEVELAND PWS15,852
MONROE CITY PWS15,600
FAIRFIELD COUNTY UTILITIES PWS15,486
STREETSBORO CITY PWS15,105
INDIAN HILL CITY PWS15,000
ASHTABULA COUNTY WATER SYSTEM14,757
MAUMEE CITY14,286
BEXLEY CITY PWS14,250
GIRARD CITY14,122
JEFFERSON CO W AND S DISTRICT - M13,983
CIRCLEVILLE CITY PWS13,927
SCIOTO CO. REGIONAL WATER DISTRICT #113,820
ENGLEWOOD CITY PWS13,463
FOSTORIA CITY13,441
DOVER CITY PWS13,253
BELLEFONTAINE CITY PWS13,249
GREENVILLE CITY PWS13,227
BEDFORD CITY PWS13,149
TRENTON CITY PWS13,012
LOVELAND CITY PWS12,800
EAST LIVERPOOL CITY12,586
BUCYRUS CITY12,570
CONNEAUT12,538
WILMINGTON CITY PWS12,401
AMHERST CITY PWS11,797
CELINA, CITY OF11,682
HARRISON CITY PWS11,600
URBANA CITY PWS11,428
NORTHWEST REGIONAL WATER DISTRICT11,059
WAPAKONETA CITY PWS11,000
VAN WERT CITY10,846
VERMILION CITY10,594
CAMBRIDGE, CITY OF10,520
GALION CITY10,453
CITY OF HEATH PWS10,310
MID-OHIO WSD - CHRISMAN AVENUE WTP10,256
PATASKALA CITY9,900
WYOMING CITY PWS9,700
JACKSON, CITY OF9,691
NORTHWESTERN W AND SD - OREGON WTLN 2009,629
OAKWOOD CITY PWS9,572
READING CITY PWS9,506
SHELBY CITY9,453
ST MARYS CITY9,356
CANAL WINCHESTER CITY PWS9,286
TWIN CITY WATER AND SEWER DISTRICT PWS9,224
LOUISVILLE CITY PWS9,186
SHEFFIELD LAKE CITY PWS9,108
CHILLICOTHE CORRECTIONAL INSTITUTION9,000
TROTWOOD CITY PWS9,000
GUERNSEY CO. WATER DEPT.8,891
NAPOLEON CITY8,858
BRYAN CITY PWS8,729
PORTAGE COUNTY WATER RESOURCES8,606
OBERLIN WATER DEPARTMENT8,600
SANITARY DISTRICT #48,575
HUBBARD CITY PWS8,518
ORRVILLE CITY PWS8,452
EATON PUBLIC WATER SYSTEM8,400
HUDSON CITY PWS8,385
WEST CARROLLTON CITY PWS8,361
KENTON CITY8,360
TRUMBULL CO. - BAZETTA/CHAMPION8,270
BELLEVUE CITY8,236
CANFIELD CITY PWS7,706
WAUSEON CITY PWS7,568
CORTLAND CITY PWS7,105
DELPHOS CITY7,101
WILLARD CITY7,099
UNION CITY PWS7,000
HURON CITY6,893
ONTARIO CITY6,756
COLUMBIANA CITY PWS6,727
LOGAN, CITY OF6,704
MILFORD CITY PWS6,700
UPPER SANDUSKY CITY6,698
STARK COUNTY WATER DISTRICT6,690
NELSONVILLE PWS6,656
HILLSBORO CITY6,650
MOUNT ORAB VILLAGE PWS6,607
PORT CLINTON CITY6,500
WATERVILLE CITY6,500
RITTMAN CITY PWS6,491
BELPRE CITY PWS6,441
NORTHERN OHIO RURAL WATER - NW DISTRICT6,409
CLYDE CITY6,325
NEWTON FALLS CITY6,109
SEBRING VILLAGE PWS6,058
ANDOVER-CAMPLANDS WATER6,009
CLEVES VILLAGE PWS6,000
GRANVILLE, VILLAGE OF5,946
GENEVA CITY PWS5,924
BROOKVILLE MUNICIPALITY PWS5,923
WELLSTON CITY PWS5,846
NEW CARLISLE CITY PWS5,800
TORONTO PWS5,676
ARCHBOLD VILLAGE5,586
GERMANTOWN CITY PWS5,547
ADA VILLAGE5,334
CANAL FULTON CITY PWS5,323
CHARDON CITY PWS5,247
NORTHERN OHIO RURAL WATER-SOUTH DISTRICT5,226
JOHNSTOWN CITY PWS5,200
WHITEHOUSE VILLAGE5,200
MID-OHIO WSD - OLD SPRINGFIELD ROAD WTP5,176
NEW LEXINGTON5,161
ERIE CO MARGARETTA DISTRICT5,131
BYESVILLE5,104
ST. CLAIRSVILLE, CITY OF PWS5,097
MUNROE FALLS CITY PWS5,042
PUT-IN-BAY VILLAGE5,000
CHAGRIN FALLS VILLAGE PWS4,991
WEST MILTON VILLAGE PWS4,890
LEXINGTON VILLAGE4,825
JEFFERSON REGIONAL WATER AUTHORITY4,813
WELLINGTON VILLAGE PWS4,802
GREENE COUNTY EASTERN REGIONAL PWS4,800
NORTHWESTERN W AND SD - PORTAGE4,776
COLDWATER VILLAGE4,774
EAST PALESTINE VILLAGE PWS4,761
MEDINA CO/SOUTHERN WATER DIST PWS4,708
GREENFIELD VILLAGE PWS4,600
ASHVILLE VILLAGE PWS4,529
CRESTLINE VILLAGE PWS4,525
WEST JEFFERSON VILLAGE PWS4,488
MID-OHIO WSD - JACKSON STREET WTP4,467
WAVERLY CITY PWS4,433
OAK HARBOR VILLAGE4,400
OTTAWA VILLAGE4,393
GEORGETOWN VILLAGE PWS4,331
MONTPELIER VILLAGE4,280
BELLAIRE PUBLIC WATER SYSTEM4,278
MCDONALD VILLAGE PWS4,236
CLARK COUNTY PARK LAYNE PWS4,221
SOUTH POINT VILLAGE4,133
BLUFFTON VILLAGE4,125
ELIDA VILLAGE4,109
WAYNESVILLE VILLAGE PWS4,100
SOUTHERN PERRY CO-CONGO4,029
WINTERSVILLE VILLAGE PWS3,924
SOUTH LEBANON CITY PWS3,891
NEWCOMERSTOWN VILLAGE PWS3,882
SWANTON VILLAGE3,855
NEW LEBANON VILLAGE PWS3,770
YELLOW SPRINGS VILLAGE PWS3,761
JACKSON/MILTON METRO WATER DISTRICT PWS3,728
MINERVA VILLAGE PWS3,684
CAREY VILLAGE PWS3,674
NORTHWESTERN W AND SD - WESTON3,648
NORTHWESTERN W AND SD - MIDDLETON TWP3,615
PAULDING VILLAGE PWS3,605
HICKSVILLE VILLAGE3,600
DELTA VILLAGE3,518
LORDSTOWN VILLAGE PWS3,515
MT GILEAD VILLAGE PWS3,503
COMMERCIAL POINT VILLAGE3,497
LOCKLAND VILLAGE PWS3,486
LEBANON CORRECTIONAL INSTITUTION3,410
ODRC-PICKAWAY CORRECTION PWS3,376
MORROW VILLAGE PWS3,360
CADIZ VILLAGE PWS3,353
MINGO JUNCTION PWS3,350

Largest first by population served, as each employer reports it to its federal registry.

Source: U.S. Environmental Protection Agency, Safe Drinking Water Information System (SDWIS/Fed), community water systems. Data captured October 2, 2026.

Jobs at public water systems

Water / Wastewater Treatment Operator

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Public water systems in other states

Texas · 1,133California · 523Illinois · 408Alabama · 294Florida · 286Michigan · 284Tennessee · 276New York · 266Pennsylvania · 259Massachusetts · 254Georgia · 242North Carolina · 237Washington · 211New Jersey · 205Missouri · 200Kentucky · 190Louisiana · 190Minnesota · 185Wisconsin · 185Indiana · 176Colorado · 167Arkansas · 157South Carolina · 143Oklahoma · 142Virginia · 142Utah · 116Iowa · 112Oregon · 111Mississippi · 107Kansas · 88West Virginia · 82Maryland · 69Arizona · 63New Mexico · 53Idaho · 43Nebraska · 43New Hampshire · 38Hawaii · 34Montana · 32Vermont · 32Maine · 31South Dakota · 31Connecticut · 30Nevada · 28Wyoming · 28Rhode Island · 26Delaware · 20North Dakota · 18Alaska · 16District of Columbia · 3

All public water systems in the U.S. · Ohio government jobs