CHALLIS CITY OF
PWS ID: ID7190013 · CHALLIS, Idaho 83226
Population Served
900
Total Violations
191
Health-Based Violations
3
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 566
- County
- Custer
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 182
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| CARBON, TOTAL | MR | 17 | 2024 |
| Nitrate | MR | 13 | 2019 |
| Revised Total Coliform Rule | MON | 12 | 2024 |
| Coliform (TCR) | MR | 10 | 2010 |
| Surface Water Treatment Rule | MR | 6 | 2023 |
| Arsenic | MR | 5 | 2017 |
| Lead and Copper Rule | MR | 4 | 2020 |
| Chromium | MR | 3 | 2011 |
| Nickel | MR | 3 | 2011 |
| Beryllium, Total | MR | 3 | 2011 |
| Selenium | MR | 3 | 2011 |
| Fluoride | MR | 3 | 2011 |
| 1,2,4-Trichlorobenzene | MR | 3 | 2019 |
| cis-1,2-Dichloroethylene | MR | 3 | 2019 |
| Xylenes, Total | MR | 3 | 2019 |
| p-Dichlorobenzene | MR | 3 | 2019 |
| Vinyl chloride | MR | 3 | 2019 |
| 1,1-Dichloroethylene | MR | 3 | 2019 |
| 1,2-Dichloroethane | MR | 3 | 2019 |
| 1,1,1-Trichloroethane | MR | 3 | 2019 |
| Carbon tetrachloride | MR | 3 | 2019 |
| 1,2-Dichloropropane | MR | 3 | 2019 |
| Trichloroethylene | MR | 3 | 2019 |
| Tetrachloroethylene | MR | 3 | 2019 |
| CHLOROBENZENE | MR | 3 | 2019 |
| Toluene | MR | 3 | 2019 |
| Ethylbenzene | MR | 3 | 2019 |
| Styrene | MR | 3 | 2019 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 2017 |
| Interim Enhanced Surface Water Treatment Rule | MR | 3 | 2022 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.