Chlorine (MRDL) violations in Oklahoma
293 active public water systems in Oklahoma had a Chlorine (MRDL) violation in the past three years, 36 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Olustee Public Works Authority Jackson County |
607 | 3 | 0 | |
|
Gans Utility Authority Sequoyah County |
600 | 3 | 0 | |
|
Red Oak Pwa Latimer County |
581 | 5 | 0 | |
|
Keota Pwa Haskell County |
564 | 6 | 1 | |
|
Osage CO Rwd # 5 Osage County |
561 | 4 | 2 | |
|
Mayes CO Rwd # 7 Mayes County |
538 | 3 | 2 | |
|
Cement Caddo County |
530 | 3 | 0 | |
|
Dill City Washita County |
526 | 7 | 1 | |
|
Canute Washita County |
524 | 9 | 1 | |
|
Bernice Pwa Delaware County |
504 | 3 | 0 | |
|
Corn Pwa Washita County |
500 | 4 | 0 | |
|
Cole McClain County |
473 | 3 | 0 | |
|
Olive School Creek County |
465 | 6 | 3 | |
|
Ravia Johnston County |
459 | 4 | 0 | |
|
Mayes CO Rwd # 8 Mayes County |
450 | 3 | 1 | |
|
Wynona Osage County |
450 | 4 | 1 | |
|
Deerfield Springs Rogers County |
445 | 5 | 2 | |
|
Lone Wolf Kiowa County |
440 | 5 | 1 | |
|
Frontier Development Auth Custer County |
437 | 3 | 1 | |
|
Billings Pwa Noble County |
436 | 4 | 1 | |
|
Leedey Dewey County |
436 | 2 | 0 | |
|
North Miami Ottawa County |
433 | 7 | 3 | |
|
Gage Ellis County |
429 | 5 | 1 | |
|
Woods County Rwd # 1 Woods County |
426 | 5 | 0 | |
|
Lamont Grant County |
417 | 10 | 0 | |
|
Cherokee Co. Rwd #8 (briggs) Cherokee County |
413 | 4 | 1 | |
|
Beaver CO Rwd #1 Turpin Beaver County |
412 | 6 | 0 | |
|
Wanette Public Works Authority Pottawatomie County |
402 | 6 | 1 | |
|
Optima Texas County |
400 | 8 | 4 | |
|
Seneca-Cayuga Nation Delaware County |
400 | 10 | 3 | |
|
Wagoner Co. Rwd #1 Wagoner County |
397 | 4 | 0 | |
|
Lehigh Coal County |
396 | 5 | 3 | |
|
Francis Pontotoc County |
390 | 2 | 0 | |
|
Terral Jefferson County |
386 | 6 | 1 | |
|
Medicine Park Comanche County |
382 | 5 | 2 | |
|
Ripley Pwa Payne County |
376 | 6 | 1 | |
|
Asher Util Dev Auth Pottawatomie County |
375 | 4 | 1 | |
|
Davidson Tillman County |
375 | 5 | 0 | |
|
Taloga Dewey County |
372 | 3 | 0 | |
|
Haworth Pwa McCurtain County |
354 | 5 | 1 | |
|
Indiahoma Public Works Authority Comanche County |
350 | 5 | 1 | |
|
Osage CO Rwd #20 (hulah) Osage County |
350 | 5 | 1 | |
|
Butler Custer County |
345 | 2 | 0 | |
|
Carter Beckham County |
330 | 2 | 0 | |
|
Robin Hill School Cleveland County |
330 | 4 | 0 | |
|
Randlett Pwa Cotton County |
320 | 6 | 1 | |
|
Keyes Utility Auth. Cimarron County |
315 | 3 | 0 | |
|
Woodward CO Rwd #1 Woodward County |
315 | 4 | 0 | |
|
Pottawatomie Co. Rwd #3 (dale Plant) Pottawatomie County |
313 | 2 | 0 | |
|
Grady CO Rwd #1 Grady County |
300 | 7 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) 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.