Non-Transient Non-Community Water System · PWS AK2333013
Hilcorp North Slope LLC Exploration Cwtf
Operator location Anchorage, Alaska - smaller served population (≤ 999) at 475 people served; 86 SDWIS violations on record from surface water sources.
- 475
- People served (this PWS)
- 86
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Hilcorp North Slope LLC Exploration Cwtf standing, high SDWIS violation third
475 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 2% is middle-third health share (≤ 23%).
The verdict
Hilcorp North Slope LLC Exploration Cwtf sits in the upper third of the sitemap cohort by violation count (86), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (475; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 2% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 86
- Total EPA violations on record
- 2%
- Health-based (MCL / treatment failure)
- 475
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
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 |
Violation Count vs. the National Corpus
Hilcorp North Slope LLC Exploration Cwtf has 86 recorded EPA violations, 70% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 30% carry more. 2% of this system's own violations are health-based (2 of 86), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
86 Around the middle fewer violations than 30% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Population served record for Hilcorp North Slope LLC Exploration Cwtf
EPA SDWIS lists 475 people served and 2 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
86 violations · 475 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Hilcorp North Slope LLC Exploration Cwtf
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Alaska compares on the same EPA violation measures. Alaska systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.