Total Haloacetic Acids (HAA5) violations in Oklahoma
282 active public water systems in Oklahoma had a Total Haloacetic Acids (HAA5) violation in the past three years, 68 of them in the latest quarter of EPA's data. What Total Haloacetic Acids (HAA5) is and why it matters.
Systems with a Total Haloacetic Acids (HAA5) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Dewey CO Rwd #3 Woodward County |
755 | 4 | 2 | |
|
McCurtain Co. Rwd #2 McCurtain County |
755 | 3 | 0 | |
|
Arapaho Custer County |
748 | 3 | 0 | |
|
Kiowa Pittsburg County |
731 | 5 | 0 | |
|
Adair Mayes County |
704 | 2 | 1 | |
|
Adair CO Rwd #5 Adair County |
675 | 9 | 0 | |
|
Verden Grady County |
659 | 2 | 0 | |
|
Alex Grady County |
635 | 8 | 2 | |
|
Elm Bend Rwd INC Nowata County |
600 | 3 | 1 | |
|
Highpoint MHP Garfield County |
600 | 4 | 0 | |
|
Konawa School Seminole County |
600 | 1 | 0 | |
|
McCurtain Municipal Authority Haskell County |
560 | 3 | 1 | |
|
Pottawatomie County Rwd #3 Pottawatomie County |
560 | 2 | 0 | |
|
Covington Garfield County |
553 | 3 | 1 | |
|
Dill City Washita County |
526 | 7 | 1 | |
|
Canute Washita County |
524 | 9 | 1 | |
|
Corn Pwa Washita County |
500 | 4 | 0 | |
|
Nowata CO RW & S Dist #1 Nowata County |
500 | 3 | 1 | |
|
Arnett Ellis County |
496 | 3 | 0 | |
|
Ochelata Utility Authority Washington County |
494 | 6 | 1 | |
|
Cole McClain County |
473 | 3 | 0 | |
|
Grady CO Rwd #2 Grady County |
455 | 5 | 0 | |
|
Tryon Lincoln County |
448 | 11 | 4 | |
|
Deerfield Springs Rogers County |
445 | 5 | 2 | |
|
North Miami Ottawa County |
433 | 7 | 3 | |
|
Gage Ellis County |
429 | 5 | 1 | |
|
Woods County Rwd # 1 Woods County |
426 | 5 | 0 | |
|
Leflore Co. Rwd #15 Le Flore County |
425 | 3 | 0 | |
|
Lamont Grant County |
417 | 10 | 0 | |
|
Beaver CO Rwd #1 Turpin Beaver County |
412 | 6 | 0 | |
|
Shidler Osage County |
404 | 2 | 0 | |
|
Delaware CO Rwd # 7 Delaware County |
400 | 1 | 0 | |
|
Dover Public Works Trust Auth Kingfisher County |
400 | 4 | 0 | |
|
Optima Texas County |
400 | 8 | 4 | |
|
Custer City PWS Custer County |
393 | 1 | 0 | |
|
Terral Jefferson County |
386 | 6 | 1 | |
|
Ripley Pwa Payne County |
376 | 6 | 1 | |
|
Taloga Dewey County |
372 | 3 | 0 | |
|
Barnes School Oklahoma County |
371 | 1 | 0 | |
|
Woods County Rwd # 3 Woods County |
356 | 1 | 0 | |
|
Carmen Public Works Authority Alfalfa County |
355 | 11 | 3 | |
|
Haworth Pwa McCurtain County |
354 | 5 | 1 | |
|
Osage CO Rwd #20 (hulah) Osage County |
350 | 5 | 1 | |
|
Fort Supply Pwa Woodward County |
328 | 2 | 0 | |
|
Fargo Ellis County |
326 | 7 | 1 | |
|
Kremlin-Hillsdale Rural Water District 1 Garfield County |
320 | 4 | 0 | |
|
Canadian CO Rws & Swmd #5 Canadian County |
316 | 1 | 0 | |
|
Craig CO Rwd #1 Craig County |
315 | 4 | 1 | |
|
Osage CO Rwd #18 (evergreen) Osage County |
302 | 4 | 2 | |
|
Arcadia Public Works Authority Oklahoma County |
300 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Total Haloacetic Acids (HAA5), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Total Haloacetic Acids (HAA5) 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.