WINTHROP TOWN OF
PWS ID: WA5397750 · Winthrop, Washington 98862
Population Served
1,350
Total Violations
27
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 484
- County
- Okanogan
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 20
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 11 | 2022 |
| Revised Total Coliform Rule | MON | 4 | 2024 |
| Coliform (TCR) | MCL | 4 | 2003 |
| Consumer Confidence Rule | Other | 3 | 2024 |
| Nitrate | MR | 2 | 2024 |
| Coliform (TCR) | MR | 2 | 2003 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.