Mercury violations in Oklahoma
21 active public water systems in Oklahoma had a Mercury violation in the past three years. What Mercury is and why it matters.
Systems with a Mercury violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Elgin Pwa Comanche County |
3,300 | 9 | 1 | |
|
Prague Lincoln County |
2,395 | 7 | 1 | |
|
Hooker Texas County |
1,788 | 5 | 1 | |
|
Oilton Creek County |
1,435 | 14 | 5 | |
|
Seminole Co. Rwd #7 Seminole County |
450 | 3 | 1 | |
|
Carmen Public Works Authority Alfalfa County |
355 | 11 | 3 | |
|
Jones State Central Middle School Oklahoma County |
280 | 5 | 2 | |
|
Spring Cove RV Park&marina Onlake Hudson Mayes County |
225 | 10 | 2 | |
|
Harper CO Rwd #1 Harper County |
198 | 10 | 1 | |
|
Willow Greer County |
114 | 8 | 1 | |
|
Peppers Ranch Logan County |
99 | 6 | 1 | |
|
Surrey Hills Texas County |
87 | 14 | 4 | |
|
Freedom Farms Cleveland County |
85 | 7 | 3 | |
|
Oak Ridge Estates I & II Water Assoc. Delaware County |
62 | 11 | 4 | |
|
Red Wagon MHP Payne County |
46 | 7 | 2 | |
|
Shady Acres Custer County Custer County |
40 | 8 | 2 | |
|
Timber Creek MHP East & West Pottawatomie County |
40 | 10 | 2 | |
|
Canoe Mountain Water System Cherokee County |
37 | 12 | 2 | |
|
Country Haven MHP Oklahoma County |
30 | 8 | 2 | |
|
Oklahoma City North Canadian Stp Oklahoma County |
30 | 7 | 1 | |
|
Grandview Village Delaware County |
24 | 5 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Mercury, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Mercury 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.