CHEFORNAK WATER SYSTEM
PWS ID: AK2270338 · CHEFORNAK, Alaska 99561
Population Served
513
Total Violations
572
Health-Based Violations
34
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 7
- County
- Bethel Census Area
- School/Daycare
- No
- MCL Violations
- 29
- Monitoring Violations
- 347
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 63 | 2015 |
| Chlorine | MR | 39 | 2014 |
| Revised Total Coliform Rule | MON | 34 | 2025 |
| Lead and Copper Rule | MR | 24 | 2023 |
| TTHM | MCL | 20 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 16 | 2012 |
| TTHM | MR | 16 | 2012 |
| Consumer Confidence Rule | Other | 15 | 2024 |
| Nitrate | MR | 14 | 2024 |
| Total Haloacetic Acids (HAA5) | MCL | 6 | 2011 |
| p-Dichlorobenzene | MR | 5 | 2024 |
| Carbon tetrachloride | MR | 5 | 2024 |
| Benzene | MR | 5 | 2024 |
| Vinyl chloride | MR | 5 | 2024 |
| 1,1-Dichloroethylene | MR | 5 | 2024 |
| 1,1,1-Trichloroethane | MR | 5 | 2024 |
| Trichloroethylene | MR | 5 | 2024 |
| Groundwater Rule | TT | 5 | 2024 |
| 1,2-Dichloroethane | MR | 5 | 2024 |
| cis-1,2-Dichloroethylene | MR | 4 | 2024 |
| Xylenes, Total | MR | 4 | 2024 |
| o-Dichlorobenzene | MR | 4 | 2024 |
| trans-1,2-Dichloroethylene | MR | 4 | 2024 |
| CHLOROBENZENE | MR | 4 | 2024 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2024 |
| DICHLOROMETHANE | MR | 4 | 2024 |
| Tetrachloroethylene | MR | 4 | 2024 |
| Ethylbenzene | MR | 4 | 2024 |
| 1,1,2-Trichloroethane | MR | 4 | 2024 |
| Toluene | MR | 4 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.