Columbia Generating Station
PWS ID: WA5392024 · Richland, Washington 99352
Population Served
1,632
Total Violations
91
Health-Based Violations
33
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 32
- County
- Benton
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 55
- Treatment Tech Violations
- 33
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 33 | 2024 |
| Diquat | MR | 5 | 2005 |
| TTHM | MR | 4 | 2016 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2016 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2007 |
| Vinyl chloride | MR | 2 | 2007 |
| 1,1-Dichloroethylene | MR | 2 | 2007 |
| trans-1,2-Dichloroethylene | MR | 2 | 2007 |
| 1,2-Dichloroethane | MR | 2 | 2007 |
| 1,1,1-Trichloroethane | MR | 2 | 2007 |
| Carbon tetrachloride | MR | 2 | 2007 |
| Trichloroethylene | MR | 2 | 2007 |
| CHLOROBENZENE | MR | 2 | 2007 |
| Benzene | MR | 2 | 2007 |
| Toluene | MR | 2 | 2007 |
| Styrene | MR | 2 | 2007 |
| Tetrachloroethylene | MR | 2 | 2007 |
| cis-1,2-Dichloroethylene | MR | 2 | 2007 |
| 1,1,2-Trichloroethane | MR | 2 | 2007 |
| 1,2-Dichloropropane | MR | 2 | 2007 |
| Ethylbenzene | MR | 2 | 2007 |
| DICHLOROMETHANE | MR | 2 | 2007 |
| p-Dichlorobenzene | MR | 2 | 2007 |
| o-Dichlorobenzene | MR | 2 | 2007 |
| Surface Water Treatment Rule | MR | 1 | 1999 |
| Asbestos | MR | 1 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.