Public water system · AK2331011
ActiveHilcorp Pboc
At a glance
Hilcorp Pboc (PWSID AK2331011) is an active non-transient non-community water system in North Slope Borough County, Alaska. It reports serving 1,200 people through 5 service connections. Its primary water source is surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in June 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,200
Service connections
5
Primary source
SW
Surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Hilcorp Pboc compare with other water systems in North Slope Borough County?
By EPA's size categories, Hilcorp Pboc is a small system (501 to 3,300 people). North Slope Borough County has 79 active public water systems, and Hilcorp Pboc is the 2nd-largest of them by population served. Its population served is about 3.1 times the county average of 383 people per system, and accounts for 4% 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 Hilcorp Pboc is about 179% above 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 150 Alaska systems (11%) list surface water as their primary source.
Who owns and regulates Hilcorp Pboc?
EPA lists Hilcorp Pboc 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 Hilcorp Pboc have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in June 2025. The violations listed here began between March 2015 and June 2025. By type: 10 monitoring and reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (7 of them). EPA lists 11 as resolved and 1 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 |
|---|---|---|---|---|
| 2025-06-01 | Required treatment not metMonthly Turbidity Exceed (Enhanced SWTR) · code 44 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2022-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2021-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2020-12-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2020-09-29 | Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2020-06-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2020-06-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2015-03-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | 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.
Hilcorp Pboc: frequently asked questions
Who runs Hilcorp Pboc?
Hilcorp Pboc (PWSID AK2331011) is a non-transient non-community water system privately owned. It is regulated by the AK state drinking water program.
How many people does Hilcorp Pboc serve?
Hilcorp Pboc reports serving 1,200 people through 5 service connections in North Slope Borough County, Alaska.
Where does Hilcorp Pboc get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Hilcorp Pboc have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in June 2025. 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 Hilcorp Pboc'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, 2 are health-based, and the most recent began in June 2025. For current results, consult EPA ECHO, or the AK state drinking water program.
Where can I find Hilcorp Pboc's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Hilcorp Pboc 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 |
| 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 |
| Worley Water Truck #30030 | 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, “Hilcorp Pboc, PWSID AK2331011, Alaska”, https://aquacensus.com/water-systems/alaska/hilcorp-pboc-ak2331011 (data as of October 1, 2026).