2,4-D violations in Oklahoma
131 active public water systems in Oklahoma had a 2,4-D violation in the past three years. What 2,4-D is and why it matters.
Systems with a 2,4-D violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Tinker Air Force Base Oklahoma County |
24,645 | 4 | 1 | |
|
Logan CO Rwd #1 Logan County |
8,907 | 2 | 0 | |
|
Piedmont Municipal Authority Canadian County |
7,542 | 6 | 1 | |
|
Kingfisher Kingfisher County |
5,073 | 3 | 0 | |
|
Harrah Oklahoma County |
4,190 | 3 | 0 | |
|
Nichols Hills Oklahoma County |
4,020 | 5 | 0 | |
|
Grady CO Rwd #6 Grady County |
3,930 | 11 | 0 | |
|
Choctaw UA Oklahoma County |
3,926 | 3 | 1 | |
|
Wewoka Public Works Authority Seminole County |
3,450 | 7 | 1 | |
|
Elgin Pwa Comanche County |
3,300 | 9 | 1 | |
|
Joseph Harp Corr Inst Cleveland County |
3,000 | 4 | 0 | |
|
Commerce Ottawa County |
2,645 | 7 | 1 | |
|
Oklahoma City Zoo Oklahoma County |
2,500 | 5 | 0 | |
|
Prague Lincoln County |
2,395 | 7 | 1 | |
|
Pawnee Pawnee County |
2,230 | 9 | 1 | |
|
Burns Flat PWS Washita County |
2,057 | 2 | 0 | |
|
Wagoner Co. Rwd #2 Wagoner County |
2,000 | 10 | 0 | |
|
Okla Christian University Oklahoma County |
1,800 | 2 | 0 | |
|
Snyder Public Works Authority Kiowa County |
1,509 | 7 | 2 | |
|
Oilton Creek County |
1,435 | 14 | 5 | |
|
Geary Blaine County |
1,258 | 8 | 1 | |
|
Mooreland Woodward County |
1,226 | 4 | 0 | |
|
Shattuck Ellis County |
1,200 | 6 | 0 | |
|
Medford Grant County |
1,172 | 3 | 0 | |
|
Laverne Harper County |
1,097 | 4 | 0 | |
|
Fairland Public Works Authority Ottawa County |
1,025 | 2 | 0 | |
|
Woodward CO Rwd #2 Woodward County |
920 | 5 | 0 | |
|
Bridge Creek School Grady County |
800 | 3 | 0 | |
|
Roger Mills Rwd # 2 (red Star) Roger Mills County |
800 | 5 | 0 | |
|
Welch Pwa Craig County |
800 | 5 | 0 | |
|
Ottawa CO Rwd #5 Ottawa County |
750 | 7 | 0 | |
|
Alex Grady County |
635 | 8 | 2 | |
|
Sooner Utilities-Tinker Town Oklahoma County |
603 | 2 | 0 | |
|
Calumet Pwa Canadian County |
600 | 4 | 0 | |
|
Washington McClain County |
600 | 2 | 0 | |
|
Canute Washita County |
524 | 9 | 1 | |
|
Arnett Ellis County |
496 | 3 | 0 | |
|
Ottawa CO Rwd # 1 Ottawa County |
458 | 3 | 0 | |
|
Jennings Pawnee County |
400 | 5 | 1 | |
|
Seneca-Cayuga Nation Delaware County |
400 | 10 | 3 | |
|
Clinton-Sherman Industrial Airpark Washita County |
358 | 5 | 0 | |
|
Carmen Public Works Authority Alfalfa County |
355 | 11 | 3 | |
|
Blue Quail Estates Canadian County |
350 | 2 | 0 | |
|
Wakita Grant County |
344 | 1 | 0 | |
|
Ralston Pawnee County |
335 | 3 | 0 | |
|
Fargo Ellis County |
326 | 7 | 1 | |
|
Nicoma Park Oklahoma County |
318 | 4 | 0 | |
|
Woodward CO Rwd #1 Woodward County |
315 | 4 | 0 | |
|
Lakewood Village Delaware County |
293 | 7 | 2 | |
|
Wildfire Estates Homeowners Cleveland County |
285 | 8 | 3 |
About this data
A system is counted once if any of its violations in the past three years involved 2,4-D, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not 2,4-D 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. Retrieved from ECHO on Oct 11, 2026.