ESTERO MUTUAL
PWS ID: CA2100519 · DILLON BEACH, California 94929
Population Served
206
Total Violations
88
Health-Based Violations
59
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 148
- County
- Marin
- School/Daycare
- No
- MCL Violations
- 59
- Monitoring Violations
- 3
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 42 | 2021 |
| Total Haloacetic Acids (HAA5) | MCL | 11 | 2015 |
| Coliform (TCR) | MCL | 6 | 2003 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 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.