SONOMA COUNTY CSA 41-JENNER
PWS ID: CA4900532 · SANTA ROSA, California 95403
Population Served
406
Total Violations
70
Health-Based Violations
28
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 123
- County
- Sonoma
- School/Daycare
- No
- MCL Violations
- 26
- Monitoring Violations
- 17
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 16 | 2020 |
| Total Haloacetic Acids (HAA5) | MCL | 10 | 2020 |
| Surface Water Treatment Rule | TT | 2 | 2006 |
| Revised Total Coliform Rule | MON | 2 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2021 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| Surface Water Treatment Rule | MR | 2 | 1999 |
| TTHM | MR | 2 | 2021 |
| Toxaphene | MR | 1 | 1981 |
| 2,4,5-TP | MR | 1 | 1981 |
| Methoxychlor | MR | 1 | 1981 |
| 2,4-D | MR | 1 | 1981 |
| BHC-GAMMA | MR | 1 | 1981 |
| Endrin | MR | 1 | 1981 |
| Lead and Copper Rule | MR | 1 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.