Public water system · AK2250061

Active

Old Harbor

At a glance

Old Harbor (PWSID AK2250061) is an active community water system in Kodiak Island Borough County, Alaska. It reports serving 246 people through 99 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, 3 are health-based, and the most recent began in March 2026.

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

Population served

246

Service connections

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDAK2250061

System typeCommunity water system

Activity statusActive

Population served246

Service connections99

Primary water sourceSurface water

Owner typeNative American

Primacy agencyAK state drinking water program

City servedOld Harbor

StateAlaska

ZIP—

CountyKodiak Island Borough County

How does Old Harbor compare with other water systems in Kodiak Island Borough County?

By EPA's size categories, Old Harbor is a very small system (500 people or fewer). Kodiak Island Borough County has 15 active public water systems, and Old Harbor is the 4th-largest of them by population served. Its population served is well below the county average of 940 people per system, and accounts for 1.7% of the 14,105 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 Old Harbor 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 Old Harbor?

EPA lists Old Harbor 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. 6 of the 15 active systems in Kodiak Island Borough County (40%) are also Native American-owned.

Does Old Harbor have drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in March 2026. The violations listed here began between February 2025 and March 2026. By type: 6 monitoring and reporting, 3 monitoring and 3 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (7 of them). EPA lists 10 as resolved and 2 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
2026-03-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2025-10-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2025-09-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Archived
2025-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2025-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2025-06-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2025-04-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2025-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2025-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2025-03-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2025-02-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2025-02-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	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.

Old Harbor: frequently asked questions

Who runs Old Harbor?

Old Harbor (PWSID AK2250061) is a community water system Native American-owned. It is regulated by the AK state drinking water program.

How many people does Old Harbor serve?

Old Harbor reports serving 246 people through 99 service connections in Kodiak Island Borough County, Alaska.

Where does Old Harbor 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 Old Harbor have any drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in March 2026. 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 Old Harbor'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, 3 are health-based, and the most recent began in March 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the AK state drinking water program.

Where can I find Old Harbor's water quality report?

As a community water system, Old Harbor 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 Kodiak Island Borough County

Water system	County	Population served	Type	Source
Kodiak Water System	Kodiak Island Borough	9,547	Community	Surface water
Uscg Station Kodiak	Kodiak Island Borough	3,092	Community	Surface water
Larsen Bay Water System	Kodiak Island Borough	271	Community	Surface water
Port Lions	Kodiak Island Borough	175	Community	Surface water
Bells Flats	Kodiak Island Borough	150	Transient non-community	Groundwater
Ouzinkie Water System	Kodiak Island Borough	144	Community	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, “Old Harbor, PWSID AK2250061, Alaska”, https://aquacensus.com/water-systems/alaska/old-harbor-ak2250061 (data as of October 1, 2026).