TYONEK WATER SYSTEM
PWS ID: AK2240472 · TYONEK, Alaska 99682
Population Served
206
Total Violations
788
Health-Based Violations
60
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 97
- County
- Kenai Peninsula Borough
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 529
- Treatment Tech Violations
- 54
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 64 | 2005 |
| Coliform (TCR) | MR | 50 | 2015 |
| Lead and Copper Rule | MR | 48 | 2025 |
| Surface Water Treatment Rule | TT | 47 | 2005 |
| Nitrate | MR | 20 | 2000 |
| Arsenic | MR | 17 | 2019 |
| Consumer Confidence Rule | Other | 15 | 2020 |
| Barium | MR | 13 | 1991 |
| Chromium | MR | 13 | 1991 |
| Cadmium | MR | 13 | 1991 |
| Fluoride | MR | 13 | 1991 |
| Selenium | MR | 13 | 1991 |
| Mercury | MR | 13 | 1991 |
| p-Dichlorobenzene | MR | 9 | 2007 |
| Carbon tetrachloride | MR | 9 | 2007 |
| 1,1-Dichloroethylene | MR | 9 | 2007 |
| 1,2-Dichloroethane | MR | 9 | 2007 |
| Benzene | MR | 9 | 2007 |
| 1,1,1-Trichloroethane | MR | 9 | 2007 |
| Trichloroethylene | MR | 9 | 2007 |
| o-Dichlorobenzene | MR | 8 | 2007 |
| CHLOROBENZENE | MR | 8 | 2007 |
| Styrene | MR | 8 | 2007 |
| Ethylbenzene | MR | 8 | 2007 |
| cis-1,2-Dichloroethylene | MR | 8 | 2007 |
| Toluene | MR | 8 | 2007 |
| Tetrachloroethylene | MR | 8 | 2007 |
| 1,2-Dichloropropane | MR | 8 | 2007 |
| Xylenes, Total | MR | 8 | 2007 |
| trans-1,2-Dichloroethylene | MR | 8 | 2007 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.