KOLIGANEK WATER SYSTEM
PWS ID: AK2260040 · KOLIGANEK, Alaska 99576
Population Served
170
Total Violations
492
Health-Based Violations
10
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 40
- County
- Dillingham Census Area
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 349
- Treatment Tech Violations
- 10
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 43 | 2016 |
| Lead and Copper Rule | MR | 23 | 2024 |
| Chlorine | MR | 22 | 2005 |
| Nitrate | MR | 18 | 2024 |
| Groundwater Rule | TT | 10 | 2018 |
| Consumer Confidence Rule | Other | 9 | 2021 |
| p-Dichlorobenzene | MR | 6 | 2014 |
| Carbon tetrachloride | MR | 6 | 2014 |
| Trichloroethylene | MR | 6 | 2014 |
| Benzene | MR | 6 | 2014 |
| Revised Total Coliform Rule | MON | 6 | 2019 |
| Vinyl chloride | MR | 6 | 2014 |
| 1,2-Dichloroethane | MR | 6 | 2014 |
| 1,1-Dichloroethylene | MR | 6 | 2014 |
| 1,1,1-Trichloroethane | MR | 6 | 2014 |
| Arsenic | MR | 5 | 2014 |
| Endrin | MR | 4 | 2010 |
| BHC-GAMMA | MR | 4 | 2010 |
| Toxaphene | MR | 4 | 2010 |
| Dalapon | MR | 4 | 2010 |
| Endothall | MR | 4 | 2010 |
| Glyphosate | MR | 4 | 2010 |
| OXAMYL | MR | 4 | 2010 |
| Simazine | MR | 4 | 2010 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2010 |
| Picloram | MR | 4 | 2010 |
| Hexachlorocyclopentadiene | MR | 4 | 2010 |
| Carbofuran | MR | 4 | 2010 |
| Atrazine | MR | 4 | 2010 |
| LASSO | MR | 4 | 2010 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.