HILCORP NORTH SLOPE LLC EXPLORATION CWTF
PWS ID: AK2333013 · ANCHORAGE, Alaska 99503
Population Served
475
Total Violations
86
Health-Based Violations
2
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 2
- County
- North Slope Borough
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 41
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 13 | 1997 |
| Nitrate | MR | 4 | 2001 |
| Chlorine | MR | 4 | 2004 |
| Selenium | MR | 2 | 2011 |
| Mercury | MR | 2 | 2011 |
| Barium | MR | 2 | 2011 |
| Surface Water Treatment Rule | TT | 2 | 1998 |
| Fluoride | MR | 2 | 2002 |
| Chromium | MR | 2 | 2011 |
| Cadmium | MR | 2 | 2011 |
| Lead and Copper Rule | MR | 1 | 1997 |
| Antimony, Total | MR | 1 | 2011 |
| Coliform (TCR) | MR | 1 | 1999 |
| Thallium, Total | MR | 1 | 2011 |
| Beryllium, Total | MR | 1 | 2011 |
| CYANIDE | MR | 1 | 2011 |
| Arsenic | MR | 1 | 1992 |
| Nickel | MR | 1 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.