YOSEMITE NPS-WAWONA
PWS ID: CA2210510 · YOSEMITE NP, California 95389
Population Served
150
Total Violations
17
Health-Based Violations
12
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 141
- County
- Mariposa
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 0
- Treatment Tech Violations
- 10
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 10 | 2000 |
| Consumer Confidence Rule | Other | 4 | 2007 |
| Coliform (TCR) | MCL | 2 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.