Public water system · AK2333487
ActiveEndicott - Hilcorp
At a glance
Endicott - Hilcorp (PWSID AK2333487) is an active non-transient non-community water system in North Slope Borough County, Alaska. It reports serving 77 people through 2 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
77
Service connections
2
Primary source
SWP
Purchased surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Endicott - Hilcorp compare with other water systems in North Slope Borough County?
By EPA's size categories, Endicott - Hilcorp is a very small system (500 people or fewer). North Slope Borough County has 79 active public water systems. Its population served is well below the county average of 383 people per system, and accounts for 0.3% of the 30,227 people reported by systems filed under the county. Across Alaska, the 1,322 active systems average 653 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Endicott - Hilcorp is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Alaska has 227 active non-transient non-community water systems, 17% of the state's 1,322 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 67 Alaska systems (5.1%) list purchased surface water as their primary source.
Who owns and regulates Endicott - Hilcorp?
EPA lists Endicott - Hilcorp as privately owned. The AK state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 69 of the 79 active systems in North Slope Borough County (87%) are also privately owned.
Does Endicott - Hilcorp have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2020. The violations listed here began between January 2003 and January 2020. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 9 as resolved and 3 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2020-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2019-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-04-01 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2014-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2007-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Endicott - Hilcorp: frequently asked questions
Who runs Endicott - Hilcorp?
Endicott - Hilcorp (PWSID AK2333487) is a non-transient non-community water system privately owned. It is regulated by the AK state drinking water program.
How many people does Endicott - Hilcorp serve?
Endicott - Hilcorp reports serving 77 people through 2 service connections in North Slope Borough County, Alaska.
Where does Endicott - Hilcorp get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Endicott - Hilcorp have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2020. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Endicott - Hilcorp's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2020. For current results, consult EPA ECHO, or the AK state drinking water program.
Where can I find Endicott - Hilcorp's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Endicott - Hilcorp is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in North Slope Borough County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Barrow Utilities & Elec. Coop., Inc.. (Bu | North Slope Borough | 4,900 | Community | Surface water |
| Hilcorp Pboc | North Slope Borough | 1,200 | Non-transient non-community | Surface water |
| Conocophillips Kuparuk Operations Center | North Slope Borough | 1,198 | Non-transient non-community | Surface water |
| Nsbu - Point Hope | North Slope Borough | 881 | Community | Surface water |
| Worley Water Truck #30033 | North Slope Borough | 770 | Non-transient non-community | Purchased surface water |
| Worley Water Truck #30031 | North Slope Borough | 770 | Non-transient non-community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Endicott - Hilcorp, PWSID AK2333487, Alaska”, https://aquacensus.com/water-systems/alaska/endicott-hilcorp-ak2333487 (data as of October 1, 2026).