YOSEMITE NPS-YOSEMITE VALLEY
PWS ID: CA2210503 · YOSEMITE NP, California 95389
Population Served
1,000
Total Violations
7
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 235
- County
- Mariposa
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 3
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 4 | 2007 |
| Lead and Copper Rule | MR | 3 | 2007 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.