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EWG's Tap Water Database — 2021 UPDATE

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Largest utilities by state:

Utility name City People served
Ada Ada Population served: 22,600
Altus Altus Population served: 21,477
Ardmore Ardmore Population served: 24,283
Bartlesville Bartlesville Population served: 34,748
Bethany Bethany Population served: 20,307
Bixby Public Works Authority Bixby Population served: 18,750
Broken Arrow Municipal Authority Broken Arrow Population served: 98,850
Chickasha Municipal Authority Chickasha Population served: 16,036
City of Edmond - Arcadia Lake Arcadia Population served: 79,408
Claremore Claremore Population served: 15,873
Creek County RWD # 2 Jenks Population served: 11,695
Del City Del City Population served: 22,128
Duncan Public Utilities Authority Duncan Population served: 23,000
Durant Durant Population served: 15,545
El Reno El Reno Population served: 16,212
Elk City Elk City Population served: 10,510
Enid Enid Population served: 49,347
Fort Sill HQUSAFACFS Fort Sill Population served: 23,000
Glenpool Water Glenpool Population served: 12,500
Grove Municipal Services Auth. Grove Population served: 11,890
Guymon Guymon Population served: 11,442
Jenks PWA Jenks Population served: 16,924
Lawton Lawton Population served: 92,757
Marshall County Water Corp Madill Population served: 14,717
McAlester PWA Mcalester Population served: 18,206
Miami Miami Population served: 13,704
Midwest City Midwest City Population served: 55,935
Moore Moore Population served: 55,083
Muskogee Muskogee Population served: 38,310
Mustang Mustang Population served: 15,435
Norman Norman Population served: 72,928
Oklahoma City Oklahoma City Population served: 644,000
Oklahoma University Norman Population served: 34,000
Okmulgee Okmulgee Population served: 13,495
OSU Water Plant Stillwater Population served: 13,000
Owasso Owasso Population served: 23,000
Ponca City Mun Water Ponca City Population served: 27,155
Rogers County Rural Water District # 3 Lake Plant Claremore Population served: 10,470
Rogers County RWD # 3 Cot Sta Claremore Population served: 10,750
Rogers County RWD # 5 Claremore Population served: 11,782
Sand Springs Sand Springs Population served: 28,774
Sapulpa Sapulpa Population served: 19,702
Sequoyah County Water Association Sallisaw Population served: 13,460
Shawnee Municipal Authority Shawnee Population served: 29,990
Southern Okla Water Corp Ardmore Population served: 11,250
Stillwater Water Plant Stillwater Population served: 53,000
Tahlequah PWA Tahlequah Population served: 14,458
Tinker AFB Bio-env Eng Tinker AFB Population served: 24,645
Tulsa Tulsa Population served: 471,000
Wagoner County Rwd #4 Broken Arrow Population served: 25,792
Washington County RWD #3 (new,#1) Collinsville Population served: 25,375
Weatherford Weatherford Population served: 10,833
Woodward Woodward Population served: 15,000
Yukon Yukon Population served: 22,498
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