NICASIO VALLEY RANCH MUTUAL
PWS ID: CA2100579 · NICASIO, California 94946
Population Served
36
Total Violations
31
Health-Based Violations
22
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 14
- County
- Marin
- School/Daycare
- No
- MCL Violations
- 22
- Monitoring Violations
- 6
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 18 | 2021 |
| Arsenic | MR | 6 | 2020 |
| Coliform (TCR) | MCL | 4 | 2003 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.