TWIN HILLS WATER SYSTEM
PWS ID: AK2260032 · TWIN HILLS, Alaska 99576-8996
Population Served
87
Total Violations
493
Health-Based Violations
57
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 28
- County
- Dillingham Census Area
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 291
- Treatment Tech Violations
- 48
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 88 | 2013 |
| Groundwater Rule | TT | 48 | 2020 |
| Nitrate | MR | 20 | 2024 |
| Revised Total Coliform Rule | MON | 12 | 2024 |
| Lead and Copper Rule | MR | 9 | 2021 |
| Coliform (TCR) | MCL | 9 | 2006 |
| Consumer Confidence Rule | Other | 5 | 2021 |
| Mercury | MR | 4 | 1999 |
| p-Dichlorobenzene | MR | 4 | 2004 |
| 1,1,1-Trichloroethane | MR | 4 | 2004 |
| Carbon tetrachloride | MR | 4 | 2004 |
| Trichloroethylene | MR | 4 | 2004 |
| Benzene | MR | 4 | 2004 |
| 1,1-Dichloroethylene | MR | 4 | 2004 |
| 1,2-Dichloroethane | MR | 4 | 2004 |
| HEXACHLOROBENZENE | MR | 3 | 2025 |
| Vinyl chloride | MR | 3 | 2004 |
| Heptachlor epoxide | MR | 3 | 2025 |
| 2,4-D | MR | 3 | 2025 |
| Carbofuran | MR | 3 | 2025 |
| Simazine | MR | 3 | 2025 |
| Heptachlor | MR | 3 | 2025 |
| BHC-GAMMA | MR | 3 | 2025 |
| Atrazine | MR | 3 | 2025 |
| 2,4,5-TP | MR | 3 | 2025 |
| Benzo(a)pyrene | MR | 3 | 2025 |
| ETHYLENE DIBROMIDE | MR | 3 | 2025 |
| Endrin | MR | 3 | 2025 |
| Endothall | MR | 3 | 2025 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2025 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.