KOYUK PUBLIC WATER SYSTEM
PWS ID: AK2340167 · KOYUK, Alaska 99753
Population Served
277
Total Violations
918
Health-Based Violations
38
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 82
- County
- Nome Census Area
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 697
- Treatment Tech Violations
- 29
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 71 | 2025 |
| Coliform (TCR) | MR | 29 | 2015 |
| Surface Water Treatment Rule | TT | 26 | 2024 |
| Revised Total Coliform Rule | MON | 26 | 2025 |
| Consumer Confidence Rule | Other | 23 | 2023 |
| Chlorine | MR | 21 | 2025 |
| Nitrate | MR | 16 | 2022 |
| Interim Enhanced Surface Water Treatment Rule | MR | 16 | 2024 |
| Total Polychlorinated Biphenyls (PCB) | MR | 12 | 1998 |
| Pentachlorophenol | MR | 12 | 1998 |
| Heptachlor epoxide | MR | 12 | 1998 |
| Heptachlor | MR | 12 | 1998 |
| 2,4-D | MR | 12 | 1998 |
| Toxaphene | MR | 12 | 1998 |
| BHC-GAMMA | MR | 12 | 1998 |
| Methoxychlor | MR | 12 | 1998 |
| Chlordane | MR | 12 | 1998 |
| Atrazine | MR | 12 | 1998 |
| 2,4,5-TP | MR | 12 | 1998 |
| p-Dichlorobenzene | MR | 11 | 2022 |
| o-Dichlorobenzene | MR | 11 | 2022 |
| Tetrachloroethylene | MR | 11 | 2022 |
| Carbon tetrachloride | MR | 11 | 2022 |
| CHLOROBENZENE | MR | 11 | 2022 |
| Toluene | MR | 11 | 2022 |
| Styrene | MR | 11 | 2022 |
| Ethylbenzene | MR | 11 | 2022 |
| 1,2-Dichloropropane | MR | 11 | 2022 |
| cis-1,2-Dichloroethylene | MR | 11 | 2022 |
| trans-1,2-Dichloroethylene | MR | 11 | 2022 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.