YOSEMITE NPS-EL PORTAL
PWS ID: CA2210515 · YOSEMITE NP, California 95389
Population Served
635
Total Violations
17
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Federal
- Connections
- 226
- County
- Mariposa
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 8
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 8 | 2005 |
| Consumer Confidence Rule | Other | 4 | 2007 |
| Coliform (TCR) | MCL | 4 | 1994 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.