MIDLAND WATER ASSOCIATION
PWS ID: OR4101139 · CLATSKANIE, Oregon 97016
Population Served
160
Total Violations
444
Health-Based Violations
70
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 72
- County
- Columbia
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 356
- Treatment Tech Violations
- 67
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 126 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | MR | 62 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | TT | 38 | 2025 |
| Revised Total Coliform Rule | MON | 27 | 2025 |
| Surface Water Treatment Rule | TT | 21 | 2020 |
| Coliform (TCR) | MR | 15 | 2015 |
| TTHM | MR | 13 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 12 | 2024 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 7 | 2022 |
| Nitrate | MR | 6 | 2021 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2021 |
| cis-1,2-Dichloroethylene | MR | 4 | 2021 |
| o-Dichlorobenzene | MR | 4 | 2021 |
| p-Dichlorobenzene | MR | 4 | 2021 |
| 1,1-Dichloroethylene | MR | 4 | 2021 |
| trans-1,2-Dichloroethylene | MR | 4 | 2021 |
| 1,2-Dichloroethane | MR | 4 | 2021 |
| 1,1,1-Trichloroethane | MR | 4 | 2021 |
| Carbon tetrachloride | MR | 4 | 2021 |
| 1,2-Dichloropropane | MR | 4 | 2021 |
| Trichloroethylene | MR | 4 | 2021 |
| 1,1,2-Trichloroethane | MR | 4 | 2021 |
| Tetrachloroethylene | MR | 4 | 2021 |
| CHLOROBENZENE | MR | 4 | 2021 |
| Toluene | MR | 4 | 2021 |
| Public Notice | Other | 4 | 2020 |
| DICHLOROMETHANE | MR | 4 | 2021 |
| Benzene | MR | 4 | 2021 |
| Ethylbenzene | MR | 4 | 2021 |
| Styrene | MR | 4 | 2021 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.