CDPR-MCCONNELL
PWS ID: CA2410301 · COLUMBIA, California 95310
Population Served
286
Total Violations
14
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 6
- County
- Merced
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 4
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 10 | 2015 |
| Nitrate | MR | 4 | 2020 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.