UC ELKUS RANCH
PWS ID: CA4100502 · HALF MOON BAY, California 94019
Population Served
34
Total Violations
30
Health-Based Violations
2
Water Source
Surface Water
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 6
- County
- San Mateo
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 4
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 2 | 2004 |
| Coliform (TCR) | MR | 2 | 1996 |
| Revised Total Coliform Rule | MON | 2 | 2018 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.