Plymouth Water District
PWS ID: WA5368045 · West Richland, Washington 99353
Population Served
288
Total Violations
633
Health-Based Violations
23
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 109
- County
- Benton
- School/Daycare
- No
- MCL Violations
- 23
- Monitoring Violations
- 601
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 26 | 2012 |
| Lead and Copper Rule | MR | 25 | 2006 |
| Nitrate | MR | 20 | 2007 |
| Coliform (TCR) | MCL | 16 | 2000 |
| Nickel | MR | 16 | 2008 |
| cis-1,2-Dichloroethylene | MR | 13 | 2022 |
| p-Dichlorobenzene | MR | 13 | 2022 |
| Vinyl chloride | MR | 13 | 2022 |
| 1,1-Dichloroethylene | MR | 13 | 2022 |
| 1,2-Dichloroethane | MR | 13 | 2022 |
| 1,1,1-Trichloroethane | MR | 13 | 2022 |
| 1,2-Dichloropropane | MR | 13 | 2022 |
| Trichloroethylene | MR | 13 | 2022 |
| 1,1,2-Trichloroethane | MR | 13 | 2022 |
| CHLOROBENZENE | MR | 13 | 2022 |
| Toluene | MR | 13 | 2022 |
| Styrene | MR | 13 | 2022 |
| o-Dichlorobenzene | MR | 13 | 2022 |
| Tetrachloroethylene | MR | 13 | 2022 |
| Ethylbenzene | MR | 13 | 2022 |
| 1,2,4-Trichlorobenzene | MR | 13 | 2022 |
| DICHLOROMETHANE | MR | 13 | 2022 |
| trans-1,2-Dichloroethylene | MR | 13 | 2022 |
| Carbon tetrachloride | MR | 13 | 2022 |
| Benzene | MR | 13 | 2022 |
| Fluoride | MR | 9 | 2023 |
| Chromium | MR | 8 | 2005 |
| CYANIDE | MR | 8 | 2005 |
| Mercury | MR | 8 | 2005 |
| Thallium, Total | MR | 8 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.