KNAPPA WATER ASSOCIATION
PWS ID: OR4100061 · ASTORIA, Oregon 97103
Population Served
1,800
Total Violations
15
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 605
- County
- Clatsop
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 9
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 3 | 2000 |
| Revised Total Coliform Rule | MON | 3 | 2023 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Lead and Copper Rule | MR | 1 | 2021 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.