PATEROS WATER DEPARTMENT
PWS ID: WA5366450 · Pateros, Washington 98846
Population Served
1,149
Total Violations
93
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 344
- County
- Okanogan
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 81
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 13 | 2004 |
| Coliform (TCR) | MCL | 6 | 1991 |
| Consumer Confidence Rule | Other | 4 | 2016 |
| Coliform (TCR) | MR | 3 | 1991 |
| Chromium | MR | 2 | 2008 |
| Fluoride | MR | 2 | 2008 |
| Mercury | MR | 2 | 2008 |
| Selenium | MR | 2 | 2008 |
| 1,2,4-Trichlorobenzene | MR | 2 | 2019 |
| cis-1,2-Dichloroethylene | MR | 2 | 2019 |
| o-Dichlorobenzene | MR | 2 | 2019 |
| Vinyl chloride | MR | 2 | 2019 |
| trans-1,2-Dichloroethylene | MR | 2 | 2019 |
| Carbon tetrachloride | MR | 2 | 2019 |
| Benzene | MR | 2 | 2019 |
| DICHLOROMETHANE | MR | 2 | 2019 |
| p-Dichlorobenzene | MR | 2 | 2019 |
| 1,1,1-Trichloroethane | MR | 2 | 2019 |
| 1,2-Dichloropropane | MR | 2 | 2019 |
| Trichloroethylene | MR | 2 | 2019 |
| 1,1,2-Trichloroethane | MR | 2 | 2019 |
| Tetrachloroethylene | MR | 2 | 2019 |
| CHLOROBENZENE | MR | 2 | 2019 |
| Toluene | MR | 2 | 2019 |
| Ethylbenzene | MR | 2 | 2019 |
| Nitrate | MR | 2 | 2024 |
| Arsenic | MR | 2 | 2008 |
| Barium | MR | 2 | 2008 |
| 1,1-Dichloroethylene | MR | 2 | 2019 |
| Styrene | MR | 2 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.