Gross Alpha, Excl. Radon and U violations in California
13 active public water systems in California had a Gross Alpha, Excl. Radon and U violation in the past three years, 1 of them in the latest quarter of EPA's data. What Gross Alpha, Excl. Radon and U is and why it matters.
Systems with a Gross Alpha, Excl. Radon and U violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
San Pasqual District a County |
1,225 | 1 | 0 | |
|
Yocha Dehe Potable Water System County |
12,800 | 2 | 0 | |
|
Big River Development Big River · County |
3,550 | 9 | 4 | |
|
Tule River Reservation Main Tule River Reservation · County |
2,560 | 9 | 2 | |
|
Chemehuevi Water County |
2,200 | 4 | 0 | |
|
Coyote Valley System County |
850 | 5 | 0 | |
|
Pit River Montgomery Creek Rancheria Montgomery Creek Rancheria · County |
90 | 11 | 0 | |
|
Fort Bidwell Reservation County |
88 | 6 | 0 | |
|
Shackleford Creek Community Water System County |
80 | 5 | 0 | |
|
La Posta Upper County |
73 | 4 | 0 | |
|
Rancho Villanueva LLC County |
68 | 5 | 1 | |
|
South Campo County |
63 | 5 | 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 Gross Alpha, Excl. Radon and U, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Gross Alpha, Excl. Radon and U 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.