| Public water system | Population served |
|---|---|
| OKLAHOMA CITY | 644,000 |
| TULSA | 413,000 |
| BROKEN ARROW MUNICIPAL AUTHORITY | 116,330 |
| NORMAN UTILITIES AUTHORITY | 104,868 |
| LAWTON | 92,757 |
| EDMOND PWA | 79,408 |
| MIDWEST CITY | 55,935 |
| MOORE PUBLIC WORKS AUTHORITY | 55,083 |
| STILLWATER UTILITIES AUTHORITY | 53,000 |
| ENID | 49,347 |
| MUSKOGEE MUNICIPAL AUTHORITY | 38,310 |
| BARTLESVILLE | 34,748 |
| OKLAHOMA UNIVERSITY | 34,000 |
| SHAWNEE MUNICIPAL AUTHORITY | 29,990 |
| SAND SPRINGS | 28,774 |
| PONCA CITY MUN WATER | 27,155 |
| WAGONER CO. RWD #4 | 25,792 |
| WASHINGTON CO RWD #3 (NEW,#1) | 25,375 |
| ARDMORE | 24,893 |
| TINKER AIR FORCE BASE | 24,645 |
| DUNCAN PUBLIC UTILITIES AUTHORITY | 23,000 |
| FORT SILL HQUSAFACFS | 23,000 |
| OWASSO | 23,000 |
| ADA | 22,600 |
| YUKON | 22,498 |
| DEL CITY | 22,128 |
| BETHANY | 20,307 |
| SAPULPA | 19,702 |
| BIXBY PUBLIC WORKS AUTHORITY | 18,750 |
| ALTUS | 18,717 |
| MUSTANG, CITY OF | 18,576 |
| MCALESTER PWA | 18,206 |
| MARSHALL COUNTY RURAL WATER DISTRICT #2 | 17,587 |
| JENKS PWA | 16,924 |
| EL RENO | 16,212 |
| CHICKASHA MUNICIPAL AUTHORITY | 16,036 |
| CLAREMORE | 15,873 |
| DURANT UTILITIES AUTHORITY | 15,545 |
| WOODWARD | 15,000 |
| TAHLEQUAH PWA | 14,458 |
| MIAMI | 13,704 |
| OKMULGEE PWA | 13,495 |
| SEQUOYAH CO. RWD #8 | 13,460 |
| OSU WATER PLANT | 13,000 |
| CREEK CO RWD # 2 | 12,788 |
| GLENPOOL WATER | 12,500 |
| ROGERS CO RWD # 5 | 11,782 |
| GUYMON | 11,442 |
| SOUTHERN OKLA WATER CORP | 11,250 |
| WEATHERFORD | 10,833 |
| ROGERS CO RWD # 3 COT STA | 10,750 |
| ELK CITY | 10,510 |
| ROGERS CO RWD # 3 LAKE PLANT | 10,470 |
| GUTHRIE | 9,925 |
| COWETA PWA | 9,450 |
| LEFLORE CO. RWD #14 | 9,077 |
| LOGAN CO RWD #1 | 8,907 |
| CLINTON | 8,883 |
| PRYOR | 8,784 |
| SALLISAW | 8,510 |
| JEFFERSON CO CONS RWD #1 | 8,398 |
| CUSHING | 8,371 |
| OKMULGEE CO. RWD #6 (HECTORVILLE) | 8,370 |
| BRYAN COUNTY RURAL WATER DISTRICT #5 | 8,325 |
| SKIATOOK PWA | 8,110 |
| WAGONER | 7,982 |
| POTEAU PWA | 7,939 |
| NEWCASTLE | 7,900 |
| ROGERS CO RWD # 4 | 7,725 |
| BLACKWELL MUNICIPAL AUTHORITY | 7,668 |
| PIEDMONT MUNICIPAL AUTHORITY | 7,542 |
| GROVE MUNICIPAL SERVICES AUTH. | 7,311 |
| IDABEL PWA | 6,952 |
| SEMINOLE | 6,899 |
| ANADARKO PUBLIC WORKS AUTHORITY | 6,804 |
| PURCELL | 6,693 |
| OSAGE CO RWD #15 | 6,647 |
| VINITA UTILITIES AUTHORITY | 6,472 |
| STEPHENS CO RWD #5 | 6,426 |
| MAYES CO RWD # 2 | 6,280 |
| BRYAN CO. RWS & SWMD #2 | 6,270 |
| PAULS VALLEY | 6,256 |
| TECUMSEH UTILITY AUTHORITY | 6,098 |
| HENRYETTA MUNICIPAL AUTHORITY | 6,096 |
| SAPULPA RURAL WATER COMPANY | 5,810 |
| NOBLE UTILITIES AUTHORITY | 5,750 |
| MCCURTAIN CO. RWD #8 (MT. FORK WATER) | 5,685 |
| CREEK CO RWD # 1 | 5,675 |
| HUGO MUNICIPAL AUTHORITY | 5,536 |
| LONGTOWN RW&SD #1 (PITTSBURG CO.) | 5,444 |
| COLLINSVILLE | 5,400 |
| PERRY WATER & LIGHT DEPT | 5,230 |
| ALVA | 5,208 |
| TRI-COUNTY RWD #2 | 5,172 |
| KINGFISHER | 5,073 |
| PORUM PWA | 5,000 |
| SULPHUR | 4,929 |
| LONE GROVE | 4,863 |
| PONTOTOC CO RWD # 7 | 4,863 |
| PUSHMATAHA CO. RWD #3 | 4,825 |
| MURRAY CO RWD # 1 | 4,800 |
| HOLDENVILLE | 4,732 |
| FORT GIBSON | 4,700 |
| LEFLORE CO. RWD #2 | 4,700 |
| ALTUS AFB | 4,617 |
| MARLOW MUNICIPAL AUTHORITY | 4,600 |
| TUTTLE | 4,500 |
| SAYRE | 4,375 |
| WAGONER CO. RWD #9 | 4,363 |
| BROKEN BOW PWA | 4,320 |
| WAGONER CO. RWD #5 | 4,251 |
| CRAIG CO RWD #2 | 4,250 |
| PONTOTOC CO RWD # 8 | 4,250 |
| ADAMSON RWD #8 | 4,221 |
| HARRAH | 4,190 |
| MAYES CO RWD #4 | 4,183 |
| MUSKOGEE CO. RWD #5 | 4,135 |
| KETCHUM PWA | 4,025 |
| NICHOLS HILLS | 4,020 |
| OKLA ORDNANCE WORKS AUTHORITY | 4,000 |
| NOWATA MUNICIPAL AUTHORITY | 3,971 |
| FREDERICK | 3,940 |
| MANNFORD | 3,935 |
| GRADY CO RWD #6 | 3,930 |
| CHOCTAW UA | 3,926 |
| CADDO CO RWD #3 | 3,900 |
| LEFLORE CO. RWD #18 | 3,870 |
| MCCURTAIN CO. RWD #1 | 3,842 |
| PAWHUSKA | 3,800 |
| MAYES CO RWD # 6 | 3,750 |
| HOBART | 3,746 |
| SPENCER | 3,746 |
| BRISTOW MUNICIPAL AUTHORITY | 3,700 |
| MCINTOSH CO. RWD #8 (TEXANNA) | 3,574 |
| CONSOLIDATED RWD #3 CREEK CO | 3,500 |
| DEWEY PUBLIC WORKS AUTHORITY | 3,490 |
| CHECOTAH PWA | 3,481 |
| WEWOKA PUBLIC WORKS AUTHORITY | 3,450 |
| MADILL | 3,410 |
| CHEROKEE CO. RWD #11 | 3,395 |
| ROGERS CO RWD # 8 | 3,375 |
| MAYES CO RWD # 5 | 3,360 |
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
More public employers
Other employers in Oklahoma
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 · 205Missouri · 200Kentucky · 190Louisiana · 190Minnesota · 185Wisconsin · 185Indiana · 176Colorado · 167Arkansas · 157South Carolina · 143Virginia · 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. · Oklahoma government jobs