E. coli (Escherichia coli) violations in Oklahoma
148 active public water systems in Oklahoma had a E. coli (Escherichia coli) violation in the past three years, 148 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Midwest City Oklahoma County |
55,935 | 3 | 1 | |
|
Tinker Air Force Base Oklahoma County |
24,645 | 4 | 1 | |
|
Woodward Woodward County |
15,000 | 5 | 1 | |
|
Weatherford Custer County |
10,833 | 5 | 1 | |
|
Clinton Custer County |
8,883 | 8 | 1 | |
|
Bryan County Rural Water District #5 Bryan County |
8,325 | 3 | 1 | |
|
Stephens CO Rwd #5 Stephens County |
6,426 | 2 | 2 | |
|
Lone Grove Carter County |
4,863 | 6 | 1 | |
|
Choctaw UA Oklahoma County |
3,926 | 3 | 1 | |
|
Tonkawa Kay County |
3,299 | 5 | 1 | |
|
Watonga Blaine County |
2,816 | 4 | 1 | |
|
Jackson CO Water Corp Jackson County |
2,662 | 7 | 2 | |
|
Creek CO Rwd # 5 Creek County |
2,500 | 1 | 1 | |
|
Prague Lincoln County |
2,395 | 7 | 1 | |
|
Pawnee Pawnee County |
2,230 | 9 | 1 | |
|
Hooker Texas County |
1,788 | 5 | 1 | |
|
Stephens CO Rwd #3 (meridian) Stephens County |
1,610 | 1 | 1 | |
|
Beaver Beaver County |
1,570 | 2 | 1 | |
|
Snyder Public Works Authority Kiowa County |
1,509 | 7 | 2 | |
|
McIntosh Co. Rwd #6 (vivian) McIntosh County |
1,500 | 2 | 1 | |
|
Tillman CO Rwd #1 Tillman County |
1,500 | 5 | 1 | |
|
Oilton Creek County |
1,435 | 14 | 5 | |
|
Waukomis Pwa Garfield County |
1,366 | 2 | 1 | |
|
Panhandle State University Texas County |
1,200 | 5 | 1 | |
|
Pontotoc CO Rwd # 9 Pontotoc County |
1,162 | 3 | 2 | |
|
Logan CO Rwd #2 Logan County |
1,146 | 1 | 1 | |
|
Hydro Pwa Caddo County |
1,060 | 5 | 1 | |
|
Frontier City Oklahoma County |
1,040 | 6 | 1 | |
|
Braggs Water Works Muskogee County |
1,030 | 2 | 1 | |
|
Okfuskee Co. Rwd #1 (boley) Okfuskee County |
1,000 | 5 | 2 | |
|
Stephens CO Rw&sd #1 Stephens County |
960 | 4 | 1 | |
|
Texhoma Texas County |
935 | 2 | 1 | |
|
Canadian CO Rwd # 4 Canadian County |
907 | 1 | 1 | |
|
Mountain View Pwa Kiowa County |
880 | 5 | 2 | |
|
Beckham CO Rwd # 2 Beckham County |
857 | 6 | 1 | |
|
Sooner Utilities-Valley Brook Oklahoma County |
853 | 2 | 1 | |
|
Alex Grady County |
635 | 8 | 2 | |
|
Lahoma Pwa Garfield County |
577 | 2 | 1 | |
|
Ottawa CO Rwd #6 Ottawa County |
560 | 6 | 1 | |
|
Lake Thunderbird SP North Sentinal Cleveland County |
500 | 3 | 1 | |
|
Olive School Creek County |
465 | 6 | 3 | |
|
Seminole Co. Rwd #7 Seminole County |
450 | 3 | 1 | |
|
Tryon Lincoln County |
448 | 11 | 4 | |
|
Billings Pwa Noble County |
436 | 4 | 1 | |
|
Gage Ellis County |
429 | 5 | 1 | |
|
Ringwood Major County |
424 | 1 | 1 | |
|
Optima Texas County |
400 | 8 | 4 | |
|
Lehigh Coal County |
396 | 5 | 3 | |
|
Terral Jefferson County |
386 | 6 | 1 | |
|
Sooner Utilities-Crosby #2 Oklahoma County |
385 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) alone.
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.