OCCIDENTAL COMMUNITY SERVICES DISTRICT
PWS ID: CA4900536 · OCCIDENTAL, California 95465
Population Served
533
Total Violations
25
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 110
- County
- Sonoma
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 11
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 4 | 2003 |
| Coliform (TCR) | MCL | 2 | 1995 |
| Surface Water Treatment Rule | MR | 2 | 1999 |
| Coliform (TCR) | MR | 2 | 2001 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| Revised Total Coliform Rule | MON | 2 | 2018 |
| TTHM | MR | 1 | 2005 |
| Lead and Copper Rule | MR | 1 | 1993 |
| Total Haloacetic Acids (HAA5) | MR | 1 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.