Public water system · AK2320094

Active

Nsbu - Atqasuk

At a glance

Nsbu - Atqasuk (PWSID AK2320094) is an active community water system in North Slope Borough County, Alaska. It reports serving 284 people through 72 service connections. Its primary water source is surface water, and EPA lists it as Native American-owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

284

Service connections

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDAK2320094

System typeCommunity water system

Activity statusActive

Population served284

Service connections72

Primary water sourceSurface water

Owner typeNative American

Primacy agencyAK state drinking water program

City servedAtqusak

StateAlaska

ZIP—

CountyNorth Slope Borough County

How does Nsbu - Atqasuk compare with other water systems in North Slope Borough County?

By EPA's size categories, Nsbu - Atqasuk is a very small system (500 people or fewer). North Slope Borough County has 79 active public water systems. Its population served is about 26% below the county average of 383 people per system, and accounts for 0.9% 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 community water system reports serving 6,703 people, so Nsbu - Atqasuk is well below that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Alaska has 406 active community water systems, 31% 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 Nsbu - Atqasuk?

EPA lists Nsbu - Atqasuk as Native American-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. 8 of the 79 active systems in North Slope Borough County (10%) are also Native American-owned.

Does Nsbu - Atqasuk have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in November 2024. The violations listed here began between August 2006 and November 2024. By type: 9 monitoring and reporting and 3 public notice, recordkeeping or other. The contaminant or rule involved most often is Surface Water Treatment Rule (3 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
2024-11-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2024-11-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2021-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2019-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2012-01-01	Public notice, recordkeeping or otherSanitary Survey (TCR) · code 28	Not reported	No	Resolved
2011-07-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2010-09-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2008-07-01	Monitoring and reportingMonitoring, Source Water (LT2) · code 32	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	No	Resolved
2007-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2006-09-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2006-09-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2006-08-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Archived

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.

Nsbu - Atqasuk: frequently asked questions

Who runs Nsbu - Atqasuk?

Nsbu - Atqasuk (PWSID AK2320094) is a community water system Native American-owned. It is regulated by the AK state drinking water program.

How many people does Nsbu - Atqasuk serve?

Nsbu - Atqasuk reports serving 284 people through 72 service connections in North Slope Borough County, Alaska.

Where does Nsbu - Atqasuk 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 Nsbu - Atqasuk 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 November 2024. 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 Nsbu - Atqasuk'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 November 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the AK state drinking water program.

Where can I find Nsbu - Atqasuk's water quality report?

As a community water system, Nsbu - Atqasuk must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

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

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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, “Nsbu - Atqasuk, PWSID AK2320094, Alaska”, https://aquacensus.com/water-systems/alaska/nsbu-atqasuk-ak2320094 (data as of October 1, 2026).