YOSEMITE NPS-TUOLUMNE MEADOWS
PWS ID: CA5510500 · YOSEMITE NP, California 95389
Population Served
2,500
Total Violations
5
Health-Based Violations
3
Water Source
Surface Water
System Details
- System Type
- Transient Non-Community
- Owner Type
- Federal
- Connections
- 6
- County
- Tuolumne
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 2
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TT | 3 | 2010 |
| Coliform (TCR) | MR | 2 | 2009 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.