KOBUK WATER SYSTEM
PWS ID: AK2340565 · KOBUK, Alaska 99751-0019
Population Served
93
Total Violations
752
Health-Based Violations
62
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 31
- County
- Northwest Arctic Borough
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 565
- Treatment Tech Violations
- 58
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Groundwater Rule | TT | 58 | 2024 |
| Groundwater Rule | MR | 39 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 30 | 2007 |
| Combined Uranium | MR | 28 | 2007 |
| Combined Radium (-226 and -228) | MR | 28 | 2007 |
| Consumer Confidence Rule | Other | 21 | 2014 |
| Coliform (TCR) | MR | 21 | 2015 |
| Chlorine | MR | 18 | 2025 |
| Nitrate | MR | 16 | 2023 |
| Pentachlorophenol | MR | 13 | 2010 |
| Heptachlor epoxide | MR | 13 | 2010 |
| Heptachlor | MR | 13 | 2010 |
| 2,4,5-TP | MR | 13 | 2010 |
| Toxaphene | MR | 13 | 2010 |
| BHC-GAMMA | MR | 13 | 2010 |
| Methoxychlor | MR | 13 | 2010 |
| Total Polychlorinated Biphenyls (PCB) | MR | 13 | 2010 |
| Chlordane | MR | 13 | 2010 |
| 2,4-D | MR | 13 | 2010 |
| Atrazine | MR | 13 | 2010 |
| Aldicarb sulfone | MR | 10 | 1995 |
| Aldicarb | MR | 10 | 1995 |
| Total Haloacetic Acids (HAA5) | MR | 10 | 2020 |
| TTHM | MR | 10 | 2020 |
| Aldicarb sulfoxide | MR | 10 | 1995 |
| Public Notice | Other | 7 | 2024 |
| Revised Total Coliform Rule | MON | 6 | 2025 |
| 1,1,1-Trichloroethane | MR | 5 | 2023 |
| o-Dichlorobenzene | MR | 5 | 2023 |
| Carbon tetrachloride | MR | 5 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.