WINCHESTER WATER DEPT
PWS ID: ID2310007 · WINCHESTER, Idaho 83555
Population Served
400
Total Violations
90
Health-Based Violations
16
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 217
- County
- Lewis
- School/Daycare
- No
- MCL Violations
- 16
- Monitoring Violations
- 69
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 16 | 2015 |
| Lead and Copper Rule | MR | 7 | 2024 |
| Chlorine | MR | 5 | 2017 |
| Revised Total Coliform Rule | MON | 3 | 2017 |
| Cadmium | MR | 3 | 2020 |
| Mercury | MR | 3 | 2020 |
| Antimony, Total | MR | 3 | 2020 |
| Thallium, Total | MR | 3 | 2020 |
| Selenium | MR | 3 | 2020 |
| Fluoride | MR | 3 | 2020 |
| Nitrate | MR | 3 | 2022 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 2017 |
| Barium | MR | 3 | 2020 |
| Beryllium, Total | MR | 3 | 2020 |
| Nitrite | MR | 3 | 2020 |
| Arsenic | MR | 3 | 2020 |
| Nickel | MR | 3 | 2020 |
| Chromium | MR | 3 | 2020 |
| TTHM | MR | 2 | 2018 |
| Radium-226 | MR | 2 | 2017 |
| Radium-228 | MR | 2 | 2017 |
| Combined Uranium | MR | 2 | 2017 |
| Coliform (TCR) | MR | 2 | 1992 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2018 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.