COLUMBIA BASIN ONION
PWS ID: OR4195757 · HERMISTON, Oregon 97838
Population Served
97
Total Violations
5
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 2
- County
- Umatilla
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 1
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 3 | 2025 |
| Lead and Copper Rule | MR | 1 | 2025 |
| Revised Total Coliform Rule | TT | 1 | 2025 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.