THORNE BAY, CITY OF
PWS ID: AK2120216 · THORNE BAY, Alaska 99919
Population Served
470
Total Violations
794
Health-Based Violations
324
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 251
- School/Daycare
- No
- MCL Violations
- 294
- Monitoring Violations
- 304
- Treatment Tech Violations
- 30
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 148 | 2020 |
| Total Haloacetic Acids (HAA5) | MCL | 146 | 2021 |
| Interim Enhanced Surface Water Treatment Rule | MR | 77 | 2025 |
| Surface Water Treatment Rule | MR | 23 | 2025 |
| Surface Water Treatment Rule | TT | 22 | 2011 |
| Total Haloacetic Acids (HAA5) | MR | 15 | 2025 |
| TTHM | MR | 15 | 2025 |
| Lead and Copper Rule | MR | 10 | 2025 |
| Interim Enhanced Surface Water Treatment Rule | TT | 8 | 2012 |
| Nitrate | MR | 6 | 2024 |
| Coliform (TCR) | MR | 5 | 2015 |
| Chlorine | MR | 5 | 2015 |
| p-Dichlorobenzene | MR | 5 | 2023 |
| 1,1-Dichloroethylene | MR | 5 | 2023 |
| trans-1,2-Dichloroethylene | MR | 5 | 2023 |
| 1,2-Dichloroethane | MR | 5 | 2023 |
| 1,1,1-Trichloroethane | MR | 5 | 2023 |
| Tetrachloroethylene | MR | 5 | 2023 |
| CHLOROBENZENE | MR | 5 | 2023 |
| Benzene | MR | 5 | 2023 |
| Toluene | MR | 5 | 2023 |
| cis-1,2-Dichloroethylene | MR | 5 | 2023 |
| Consumer Confidence Rule | Other | 5 | 2018 |
| 1,2,4-Trichlorobenzene | MR | 5 | 2023 |
| Xylenes, Total | MR | 5 | 2023 |
| DICHLOROMETHANE | MR | 5 | 2023 |
| Vinyl chloride | MR | 5 | 2023 |
| 1,2-Dichloropropane | MR | 5 | 2023 |
| Trichloroethylene | MR | 5 | 2023 |
| 1,1,2-Trichloroethane | MR | 5 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.