YOSEMITE WEST WATER SYSTEM
PWS ID: CA2210924 · MARIPOSA, California 95338
Population Served
420
Total Violations
28
Health-Based Violations
14
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 185
- County
- Mariposa
- School/Daycare
- No
- MCL Violations
- 14
- Monitoring Violations
- 11
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 14 | 2011 |
| Nitrate | MR | 6 | 2012 |
| Lead and Copper Rule | MR | 3 | 2004 |
| Coliform (TCR) | MR | 2 | 2006 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.