Combined Radium (-226 and -228) violations in Oklahoma
112 active public water systems in Oklahoma had a Combined Radium (-226 and -228) violation in the past three years. What Combined Radium (-226 and -228) is and why it matters.
Systems with a Combined Radium (-226 and -228) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Winter Creek Water Company, LLC Grady County |
46 | 7 | 4 | |
|
Walnut Park Estates Osage County |
42 | 11 | 4 | |
|
Shady Acres Custer County Custer County |
40 | 8 | 2 | |
|
Canoe Mountain Water System Cherokee County |
37 | 12 | 2 | |
|
Rock Creek Logan County |
33 | 12 | 5 | |
|
Eastside MHP Grady County |
32 | 9 | 4 | |
|
Country Haven MHP Oklahoma County |
30 | 8 | 2 | |
|
Adair CO Rws & Swmd #6 Adair County |
27 | 3 | 0 | |
|
Grandview Village Delaware County |
24 | 5 | 0 | |
|
Skyview Mobile Home Park Grady County |
24 | 12 | 5 | |
|
Pecan Tree Water Assn Cleveland County |
22 | 8 | 3 | |
|
Foss Reservoir McD Custer County |
12 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Combined Radium (-226 and -228), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Combined Radium (-226 and -228) 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.