All water systems in Oklahoma
1,291 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rogers CO Rwd # 3 Cot Sta Rogers County |
10,750 | 5 | 0 | |
|
Elk City Beckham County |
10,510 | 2 | 0 | |
|
Rogers CO Rwd # 3 Lake Plant Rogers County |
10,470 | 4 | 2 | |
|
Guthrie Logan County |
9,925 | 3 | 0 | |
|
Coweta Pwa Wagoner County |
9,450 | 11 | 1 | |
|
Leflore Co. Rwd #14 Le Flore County |
9,077 | 0 | 0 | |
|
Logan CO Rwd #1 Logan County |
8,907 | 2 | 0 | |
|
Clinton Custer County |
8,883 | 8 | 1 | |
|
Pryor Mayes County |
8,784 | 0 | 0 | |
|
Sallisaw Sequoyah County |
8,510 | 2 | 0 | |
|
Jefferson CO Cons Rwd #1 Jefferson County |
8,398 | 3 | 0 | |
|
Chickasaw Winstar Casino County |
8,376 | 0 | 0 | |
|
Cushing Payne County |
8,371 | 1 | 0 | |
|
Okmulgee Co. Rwd #6 (hectorville) Okmulgee County |
8,370 | 1 | 0 | |
|
Bryan County Rural Water District #5 Bryan County |
8,325 | 3 | 1 | |
|
Skiatook Pwa Osage County |
8,110 | 1 | 1 | |
|
Wagoner Wagoner County |
7,982 | 3 | 2 | |
|
Poteau Pwa Le Flore County |
7,939 | 3 | 0 | |
|
Newcastle McClain County |
7,900 | 2 | 1 | |
|
Rogers CO Rwd # 4 Rogers County |
7,725 | 3 | 0 | |
|
Blackwell Municipal Authority Kay County |
7,668 | 3 | 0 | |
|
Piedmont Municipal Authority Canadian County |
7,542 | 6 | 1 | |
|
Grove Municipal Services Auth. Delaware County |
7,311 | 4 | 1 | |
|
Falls Creek Baptist Conference Center Murray County |
7,000 | 1 | 0 | |
|
Idabel Pwa McCurtain County |
6,952 | 3 | 0 | |
|
Seminole Seminole County |
6,899 | 1 | 0 | |
|
Anadarko Public Works Authority Caddo County |
6,804 | 3 | 0 | |
|
Purcell McClain County |
6,693 | 1 | 0 | |
|
Osage CO Rwd #15 Osage County |
6,647 | 0 | 0 | |
|
Vinita Utilities Authority Craig County |
6,472 | 5 | 1 | |
|
Stephens CO Rwd #5 Stephens County |
6,426 | 2 | 2 | |
|
Mayes CO Rwd # 2 Mayes County |
6,280 | 1 | 0 | |
|
Bryan Co. Rws & Swmd #2 Bryan County |
6,270 | 4 | 0 | |
|
Pauls Valley Garvin County |
6,256 | 3 | 0 | |
|
Tecumseh Utility Authority Pottawatomie County |
6,098 | 1 | 1 | |
|
Henryetta Municipal Authority Okmulgee County |
6,096 | 2 | 0 | |
|
Quapaw Downstream Casino & Resort County |
6,000 | 0 | 0 | |
|
Sapulpa Rural Water Company Creek County |
5,810 | 1 | 1 | |
|
Pottawatomie Co. Rwd #3 (dale Plant) County |
5,780 | 0 | 0 | |
|
Noble Utilities Authority Cleveland County |
5,750 | 4 | 0 | |
|
McCurtain Co. Rwd #8 (mt. Fork Water) McCurtain County |
5,685 | 0 | 0 | |
|
Creek CO Rwd # 1 Creek County |
5,675 | 3 | 0 | |
|
Hugo Municipal Authority Choctaw County |
5,536 | 4 | 0 | |
|
Deer Creek Rural Water Corp Oklahoma County |
5,500 | 1 | 0 | |
|
Longtown Rw&sd #1 (pittsburg Co.) Pittsburg County |
5,444 | 2 | 0 | |
|
Collinsville Tulsa County |
5,400 | 4 | 0 | |
|
Perry Water & Light Dept Noble County |
5,230 | 8 | 1 | |
|
Alva Woods County |
5,208 | 5 | 1 | |
|
Tri-County Rwd #2 Pottawatomie County |
5,172 | 3 | 0 | |
|
Kingfisher Kingfisher County |
5,073 | 3 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oklahoma records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.