All water systems in Oklahoma
1,291 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Porum Pwa Muskogee County |
5,000 | 2 | 0 | |
|
Sulphur Murray County |
4,929 | 0 | 0 | |
|
Lone Grove Carter County |
4,863 | 6 | 1 | |
|
Pontotoc CO Rwd # 7 Pontotoc County |
4,863 | 0 | 0 | |
|
Pushmataha Co. Rwd #3 Pushmataha County |
4,825 | 3 | 1 | |
|
Murray CO Rwd # 1 Murray County |
4,800 | 1 | 0 | |
|
Holdenville Hughes County |
4,732 | 7 | 1 | |
|
Fort Gibson Muskogee County |
4,700 | 2 | 0 | |
|
Leflore Co. Rwd #2 Le Flore County |
4,700 | 1 | 1 | |
|
Altus Afb Jackson County |
4,617 | 3 | 0 | |
|
Marlow Municipal Authority Stephens County |
4,600 | 1 | 0 | |
|
Tuttle Grady County |
4,500 | 1 | 0 | |
|
Sayre Beckham County |
4,375 | 0 | 0 | |
|
Wagoner Co. Rwd #9 Wagoner County |
4,363 | 5 | 0 | |
|
Broken Bow Pwa McCurtain County |
4,320 | 1 | 0 | |
|
Wagoner Co. Rwd #5 Wagoner County |
4,251 | 1 | 0 | |
|
Craig CO Rwd #2 Craig County |
4,250 | 3 | 0 | |
|
Pontotoc CO Rwd # 8 Pontotoc County |
4,250 | 0 | 0 | |
|
Adamson Rwd #8 Pittsburg County |
4,221 | 1 | 0 | |
|
Harrah Oklahoma County |
4,190 | 3 | 0 | |
|
Mayes CO Rwd #4 Mayes County |
4,183 | 4 | 0 | |
|
Muskogee Co. Rwd #5 Muskogee County |
4,135 | 1 | 1 | |
|
Ketchum Pwa Craig County |
4,025 | 1 | 0 | |
|
Nichols Hills Oklahoma County |
4,020 | 5 | 0 | |
|
Okla Ordnance Works Authority Mayes County |
4,000 | 1 | 0 | |
|
Nowata Municipal Authority Nowata County |
3,971 | 2 | 0 | |
|
Frederick Tillman County |
3,940 | 4 | 0 | |
|
Mannford Creek County |
3,935 | 0 | 0 | |
|
Grady CO Rwd #6 Grady County |
3,930 | 11 | 0 | |
|
Choctaw UA Oklahoma County |
3,926 | 3 | 1 | |
|
Caddo CO Rwd #3 Caddo County |
3,900 | 2 | 0 | |
|
Leflore Co. Rwd #18 Le Flore County |
3,870 | 4 | 0 | |
|
McCurtain Co. Rwd #1 McCurtain County |
3,842 | 0 | 0 | |
|
Pawhuska Osage County |
3,800 | 2 | 0 | |
|
Mayes CO Rwd # 6 Mayes County |
3,750 | 1 | 0 | |
|
Hobart Kiowa County |
3,746 | 0 | 0 | |
|
Spencer Oklahoma County |
3,746 | 5 | 1 | |
|
Bristow Municipal Authority Creek County |
3,700 | 6 | 1 | |
|
McIntosh Co. Rwd #8 (texanna) McIntosh County |
3,574 | 2 | 0 | |
|
Consolidated Rwd #3 Creek CO Creek County |
3,500 | 3 | 1 | |
|
Dewey Public Works Authority Washington County |
3,490 | 2 | 0 | |
|
Checotah Pwa McIntosh County |
3,481 | 3 | 1 | |
|
Wewoka Public Works Authority Seminole County |
3,450 | 7 | 1 | |
|
Madill Marshall County |
3,410 | 4 | 0 | |
|
Cherokee Co. Rwd #11 Cherokee County |
3,395 | 1 | 0 | |
|
Rogers CO Rwd # 8 Rogers County |
3,375 | 0 | 0 | |
|
Mayes CO Rwd # 5 Mayes County |
3,360 | 1 | 0 | |
|
Elgin Pwa Comanche County |
3,300 | 9 | 1 | |
|
Tonkawa Kay County |
3,299 | 5 | 1 | |
|
Stilwell Adair County |
3,276 | 2 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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.