Styrene violations in California
28 active public water systems in California had a Styrene violation in the past three years, 2 of them still unresolved. What Styrene is and why it matters.
Systems with a Styrene violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Shackleford Creek Community Water System County |
80 | 5 | 0 | |
|
South Campo County |
63 | 5 | 0 | |
|
Corona, City of Corona · Riverside County |
169,380 | 6 | 0 | |
|
City of Sunnyvale Sunnyvale · Santa Clara County |
157,566 | 5 | 0 | |
|
Quechan Casino Resort County |
2,950 | 6 | 0 | |
|
Sierra Tahoe Main Lodge El Dorado County |
1,900 | 5 | 0 | |
|
Madison Service Dist Yolo County |
876 | 8 | 1 | |
|
Havasu Water Company County |
361 | 11 | 4 | |
|
Cacheville Service Dist Yolo County |
239 | 8 | 1 | |
|
Baker Ranch Water Corp Placer County |
150 | 3 | 1 | |
|
Gold Beach Park El Dorado County |
134 | 2 | 0 | |
|
Acton Conservation Camp #11 Los Angeles County |
90 | 4 | 0 | |
|
B K Lighting INC Madera County |
90 | 2 | 0 | |
|
Pit River Montgomery Creek Rancheria Montgomery Creek Rancheria · County |
90 | 11 | 0 | |
|
Fort Bidwell Reservation County |
88 | 6 | 0 | |
|
Resource Center Santa Barbara · Santa Barbara County |
85 | 2 | 0 | |
|
Round Valley Agency County |
84 | 7 | 1 | |
|
Rancho Villanueva LLC County |
68 | 5 | 1 | |
|
Brookside MHP San Bernardino County |
65 | 7 | 3 | |
|
Aguirre MHP County |
60 | 10 | 0 | |
|
Angelique Maelee Properties County |
50 | 8 | 1 | |
|
Madera Irrigation District Madera County |
50 | 4 | 2 | |
|
Gonzalez MHP County |
41 | 3 | 0 | |
|
Sandoval MHP County |
38 | 5 | 1 | |
|
Indian Village County |
35 | 7 | 2 | |
|
Sws Land Development INC Madera County |
35 | 4 | 0 | |
|
Silverfork School El Dorado County |
25 | 8 | 0 | |
|
Robinson's Corner MHP Butte County |
20 | 8 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Styrene, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Styrene 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. Retrieved from ECHO on Oct 11, 2026.