Combined Radium (-226 and -228) violations in California
11 active public water systems in California had a Combined Radium (-226 and -228) violation in the past three years, 2 of them in the latest quarter of EPA's data. 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 |
|---|---|---|---|---|
|
San Pasqual District a County |
1,225 | 1 | 0 | |
|
South Campo County |
63 | 5 | 0 | |
|
Yocha Dehe Potable Water System County |
12,800 | 2 | 0 | |
|
Tule River Reservation Main Tule River Reservation · County |
2,560 | 9 | 2 | |
|
Big Sandy Rancheria Big Sandy Rancheria · County |
408 | 5 | 2 | |
|
Pit River Montgomery Creek Rancheria Montgomery Creek Rancheria · County |
90 | 11 | 0 | |
|
Shackleford Creek Community Water System County |
80 | 5 | 0 | |
|
La Posta Upper County |
73 | 4 | 0 | |
|
Rancho Villanueva LLC County |
68 | 5 | 1 | |
|
Aguirre MHP County |
60 | 10 | 0 | |
|
Angelique Maelee Properties County |
50 | 8 | 1 |
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 California 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.