NORTH PLAINS ARCO
PWS ID: OR4194533 · PORTLAND, Oregon 97229
Population Served
500
Total Violations
52
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 36
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 26 | 2016 |
| Coliform (TCR) | MCL | 10 | 2009 |
| Nitrate | MR | 9 | 2023 |
| Revised Total Coliform Rule | MON | 1 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.