Endrin violations in Oklahoma
96 active public water systems in Oklahoma had a Endrin violation in the past three years. What Endrin is and why it matters.
Systems with a Endrin 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 | |
|
Kingfisher Kingfisher County |
5,073 | 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 | |
|
Elgin Pwa Comanche County |
3,300 | 9 | 1 | |
|
Oklahoma City Zoo Oklahoma County |
2,500 | 5 | 0 | |
|
Prague Lincoln County |
2,395 | 7 | 1 | |
|
Pawnee Pawnee County |
2,230 | 9 | 1 | |
|
Okla Christian University Oklahoma County |
1,800 | 2 | 0 | |
|
Oilton Creek County |
1,435 | 14 | 5 | |
|
Medford Grant County |
1,172 | 3 | 0 | |
|
Woodward CO Rwd #2 Woodward County |
920 | 5 | 0 | |
|
Bryan Co. Rwd #9 Bryan County |
820 | 3 | 0 | |
|
Bridge Creek School Grady County |
800 | 3 | 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 | |
|
Pottawatomie County Rwd #3 Pottawatomie County |
560 | 2 | 0 | |
|
Arnett Ellis County |
496 | 3 | 0 | |
|
Grady CO Rwd #2 Grady County |
455 | 5 | 0 | |
|
Jennings Pawnee County |
400 | 5 | 1 | |
|
Seneca-Cayuga Nation Delaware County |
400 | 10 | 3 | |
|
Carmen Public Works Authority Alfalfa County |
355 | 11 | 3 | |
|
Blue Quail Estates Canadian County |
350 | 2 | 0 | |
|
Ralston Pawnee County |
335 | 3 | 0 | |
|
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 | |
|
Jones State Central Middle School Oklahoma County |
280 | 5 | 2 | |
|
Roosevelt Pwa Kiowa County |
280 | 4 | 0 | |
|
Eakly Development Corp Caddo County |
277 | 4 | 0 | |
|
Lookeba Sickles School Caddo County |
250 | 8 | 2 | |
|
Breckinridge Pwa Garfield County |
239 | 6 | 1 | |
|
Spring Cove RV Park&marina Onlake Hudson Mayes County |
225 | 10 | 2 | |
|
Southern Hills Estates Grady County |
200 | 2 | 0 | |
|
Summit Ridge Retirement Center, Inc. Oklahoma County |
200 | 1 | 0 | |
|
Meno Major County |
195 | 3 | 1 | |
|
Sharon Utilities Woodward County |
175 | 10 | 2 | |
|
Sherwood Forest Mobile Estates Oklahoma County |
172 | 6 | 1 | |
|
Hallett Public Works Authority Pawnee County |
168 | 4 | 0 | |
|
Sooner Utilities-Crosby #1 Oklahoma County |
168 | 4 | 1 | |
|
Kenefic Bryan County |
165 | 5 | 0 | |
|
Potters Trailer Park Beckham County |
150 | 6 | 0 | |
|
Holiday Shores Prop Assn Delaware County |
136 | 3 | 1 | |
|
Gypsy School Creek County |
132 | 5 | 2 | |
|
Foss Washita County |
127 | 7 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Endrin, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Endrin 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.