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Public water systems in Missouri

200 public water systems in Missouri, 16th 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
KANSAS CITY PWS553,295
ST LOUIS CITY PWS304,709
CITY UTILITIES OF SPRINGFIELD210,898
CITY OF COLUMBIA UTILITIES126,254
INDEPENDENCE PWS120,000
ST CHARLES COUNTY PWSD 2100,587
LEES SUMMIT PWS99,400
ST CHARLES PWS78,961
BLUE SPRINGS PWS61,084
ST PETERS PWS52,575
WENTZVILLE PWS41,784
UNIVERSITY OF MISSOURI COLUMBIA40,000
CAPE GIRARDEAU PWS39,941
JEFFERSON CO CONS PWSD C 137,000
FORT LEONARD WOOD34,000
OFALLON PWS32,515
LIBERTY PWS30,800
KIRKWOOD PWS28,000
GLADSTONE PWS27,000
BOONE COUNTY CONS PWSD 124,700
NIXA PWS24,532
JACKSON COUNTY PWSD 124,500
BELTON PWS23,598
OZARK PWS22,000
SEDALIA PWS21,725
RAYMORE PWS21,517
JEFFERSON COUNTY PWSD 121,113
ROLLA PWS20,800
FARMINGTON PWS18,217
KIRKSVILLE PWS17,566
HANNIBAL PWS17,108
POPLAR BLUFF PWS17,043
JEFFERSON COUNTY PWSD 317,000
COLE COUNTY PWSD 116,548
JEFFERSON COUNTY PWSD 216,548
JACKSON COUNTY PWSD 216,440
SIKESTON PWS16,291
REPUBLIC PWS16,100
GRAIN VALLEY PWS16,000
LEBANON PWS15,442
BOONE COUNTY PWSD 915,035
JACKSON PWS15,000
TROY PWS15,000
CARTHAGE PWS14,600
WASHINGTON PWS14,068
LINCOLN COUNTY PWSD 114,000
MOBERLY PWS13,783
WEBB CITY PWS13,404
COLE COUNTY PWSD 213,107
CALLAWAY 2 WATER DISTRICT13,080
FESTUS PWS13,000
MARSHALL PWS12,934
MACON CO PWSD 112,865
WEST PLAINS PWS12,864
BRANSON PWS12,640
FULTON PWS12,600
JOHNSON COUNTY PWSD 212,490
UNION PWS12,348
NEOSHO PWS12,157
BUTLER COUNTY PWSD 112,000
CAMERON PWS11,963
KEARNEY PWS11,500
THOMAS HILL PWSD 111,250
EXCELSIOR SPRINGS PWS11,084
SMITHVILLE PWS10,885
MARYVILLE PWS10,775
KENNETT PWS10,200
CHILLICOTHE MUNICIPAL UTILITIES PWS10,187
WHITEMAN AIR BASE10,106
HARRISONVILLE PWS10,019
JEFFERSON COUNTY PWSD 1010,000
CALLAWAY COUNTY PWSD 19,840
MONETT PWS9,789
JACKSON COUNTY PWSD 139,700
VERNON COUNTY CONS PWSD 19,615
PLATTE CO PWSD 49,552
BARTON DADE CEDAR JASP COUNTYCONS PWSD 19,523
RAY COUNTY CONS PWSD 29,360
GREENE COUNTY PWSD 19,168
JACKSON COUNTY PWSD 158,772
PARK HILLS PWS8,587
PERRYVILLE PWS8,555
LACLEDE COUNTY PWSD 18,550
CAPE PERRY COUNTY PWSD 1 SOUTH8,545
WILLARD PWS8,400
OAK GROVE PWS8,289
PLEASANT HILL PWS8,262
FRANKLIN COUNTY PWSD 38,250
LAFAYETTE COUNTY PWSD 18,250
WARRENTON PWS8,208
DEXTER PWS8,200
NEVADA PWS8,198
CARL JUNCTION PWS8,142
PULASKI COUNTY PWSD 28,038
JEFFERSON COUNTY PWSD 58,000
BOONVILLE PWS7,964
CAMDEN COUNTY PWSD 4 HORSESHOE BEND7,912
RALLS COUNTY PWSD 17,662
DEKALB COUNTY PWSD 17,635
PIKE COUNTY PWSD 17,590
COLE COUNTY PWSD 47,568
ADAIR COUNTY PWSD 17,500
JEFFERSON COUNTY PWSD 67,500
MARSHFIELD PWS7,425
LAF JO SALINE COUNTY CONS PWSD 27,180
CLARK COUNTY CONS PWSD 17,140
SULLIVAN PWS7,081
PLATTE COUNTY CONS PWSD 17,074
MONROE COUNTY PWSD 26,700
CANNON PWSD 16,482
BOONE COUNTY PWSD 46,455
NODAWAY COUNTY PWSD 16,428
DESOTO PWS6,400
TANEY COUNTY PWSD 26,250
PECULIAR PWS6,226
JEFFERSON COUNTY PWSD 76,100
LACLEDE COUNTY PWSD 36,075
CASS COUNTY PWSD 96,063
ANDREW COUNTY PWSD 16,042
PEMISCOT COUNTY CON PWSD 16,042
PACIFIC PWS6,000
TANEY COUNTY PWSD 36,000
CHARLESTON PWS5,900
RICHMOND PWS5,797
JACKSON COUNTY PWSD 125,705
ROGERSVILLE PWS5,602
PEVELY PWS5,600
TRENTON MUNICIPAL UTILITIES PWS5,600
CARUTHERSVILLE PWS5,518
JASPER COUNTY PWSD 15,500
MACON PWS5,489
WAYNESVILLE PWS5,460
SAVANNAH PWS5,249
ODESSA PWS5,202
CHARITON LINN COUNTY PWSD 35,200
ST ROBERT PWS5,192
DESLOGE PWS5,034
HERCULANEUM PWS5,000
ASHLAND PWS4,999
STE GENEVIEVE PWS4,999
CLINTON CO PWSD 4 SYS 14,968
BOONE COUNTY PWSD 104,963
CLAY COUNTY PWSD 64,912
MARION COUNTY PWSD 14,900
ELDON PWS4,895
HIGGINSVILLE PWS4,800
MOUNTAIN GROVE PWS4,789
SALEM PWS4,736
CRYSTAL CITY PWS4,733
JEFFERSON CO PWSD 84,733
LEXINGTON PWS4,729
JOHNSON COUNTY PWSD 34,700
ST CLAIR PWS4,700
PLATTE CITY PWS4,691
SCOTT CITY PWS4,653
CASS COUNTY PWSD 24,650
MOUNT VERNON PWS4,575
LAMAR PWS4,500
MOSCOW MILLS PWS4,500
NORTH KANSAS CITY PWS4,500
FREDERICKTOWN PWS4,429
HOLLISTER PWS4,426
CALIFORNIA PWS4,423
SULLIVAN COUNTY PWSD 14,412
DUNKLIN COUNTY PWSD 14,307
BUTLER PWS4,219
BOWLING GREEN PWS4,195
CASS COUNTY PWSD 74,143
BROOKFIELD PWS4,111
JACKSON COUNTY PWSD 164,075
CENTRALIA PWS4,027
AUDRAIN COUNTY CONSOLIDATED PWSD 24,016
PULASKI COUNTY PWSD 14,000
CAMDENTON PWS3,960
KNOX COUNTY PUBLIC WATER & SEWER DIST 13,947
ST JAMES PWS3,935
GRUNDY COUNTY PWSD 13,900
MONTGOMERY CO PWSD 13,850
HARRISON COUNTY PWSD 23,740
JOHNSON COUNTY PWSD 13,730
CLINTON COUNTY PWSD 33,722
STE GENEVIEVE COUNTY PWSD 1 SC3,718
MALDEN PWS3,706
PALMYRA PWS3,595
EL DORADO SPRINGS PWS3,593
ANDREW COUNTY PWSD 23,580
ST CHARLES CO PWSD #2 WRIGHT CITY3,550
BONNE TERRE PWS3,537
CARROLLTON PWS3,514
BONNE TERRE PRISON3,500
FARMINGTON CORRECTIONAL CENTER3,500
FRANKLIN COUNTY PWSD 13,500
SUGAR CREEK PWS3,500
CLAY COUNTY PWSD 23,485
SCHUYLER COUNTY CONSOLIDATED PWSD 13,482
BUFFALO PWS3,462
CLAY COUNTY PWSD 33,447
JASPER COUNTY PWSD 23,383
SCOTLAND COUNTY CONS PWSD 13,360
TEXAS COUNTY PWSD 13,335

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

More public employers

Other employers in Missouri

Fire departmentsTransit agenciesSchool districtsPolice departmentsSheriff's officesCampus police departmentsCommunity collegesPublic universitiesPublic librariesPublic power utilities

Public water systems in other states

Texas · 1,133California · 523Illinois · 408Alabama · 294Florida · 286Michigan · 284Tennessee · 276New York · 266Pennsylvania · 259Massachusetts · 254Ohio · 243Georgia · 242North Carolina · 237Washington · 211New Jersey · 205Kentucky · 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. · Missouri government jobs