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Yukon-Koyukuk Census Area County, Alaska — public water systems

At a glance

34 active public water systems are filed under Yukon-Koyukuk Census Area County, Alaska in EPA's SDWIS records, together reporting 6,119 people served. The largest is Ft. Yukon Public Water System, which reports serving 665 people. 27 are community water systems serving people where they live; the other 7 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

34

Population served

6.1K

Community systems

27

Groundwater share

82.4%

How does Yukon-Koyukuk Census Area County compare with other Alaska counties?

Yukon-Koyukuk Census Area County has the 10th-most active public water systems among the 25 counties listed for active Alaska systems in EPA records; among the 24 with 3 or more systems, the median has 23. Its systems report 6,119 people served in total, the 19th-largest county figure in the state and 0.7% of the statewide total. The average system here reports serving 180 people, well below the Alaska average of 653. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Yukon-Koyukuk Census Area County's drinking water come from?

By primary water source, Yukon-Koyukuk Census Area County's active systems draw on groundwater (23, 68%), surface water (6, 18%) and groundwater under influence of surface water (5, 15%). Overall, 82% rely mainly on groundwater (including purchased groundwater) and 18% on surface water, compared with 84% and 16% across Alaska. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Ft. Yukon Public Water System, draws primarily on groundwater under influence of surface water.

What kinds of water systems operate in Yukon-Koyukuk Census Area County?

Yukon-Koyukuk Census Area County's active systems break down as 27 community systems (79%), 2 non-transient non-community systems (5.9%) and 5 transient non-community systems (15%). 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. 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as Native American (79%), private (12%), local government (2.9%) and federal government (2.9%).

Water systems in Yukon-Koyukuk Census Area County

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Active public water systems in Yukon-Koyukuk Census Area County, Alaska
#Water systemCountyPopulation servedTypeSource
1Ft. Yukon Public Water SystemYukon-Koyukuk Census Area665CommunityGroundwater under influence of surface water
2Galena Wtp1 - CityYukon-Koyukuk Census Area490CommunityGroundwater
3Nenana Municipal WaterYukon-Koyukuk Census Area486CommunityGroundwater
4Mcgrath Water SystemYukon-Koyukuk Census Area341CommunitySurface water
5Huslia Public Water SystemYukon-Koyukuk Census Area323CommunityGroundwater
6Galena Wtp2 - GilaYukon-Koyukuk Census Area290CommunityGroundwater
7Too'Gha Inc. - in TananaYukon-Koyukuk Census Area271CommunitySurface water
8Nulato River WellYukon-Koyukuk Census Area245CommunityGroundwater
9Ruby Water SystemYukon-Koyukuk Census Area215CommunityGroundwater
10Kaltag Public Water SystemYukon-Koyukuk Census Area214CommunityGroundwater under influence of surface water
11Grayling Water SystemYukon-Koyukuk Census Area207CommunitySurface water
12Minto Community Water SystemYukon-Koyukuk Census Area205CommunityGroundwater
13Holy Cross Water SystemYukon-Koyukuk Census Area182CommunityGroundwater
14Venetie Water SystemYukon-Koyukuk Census Area181CommunityGroundwater under influence of surface water
15Arctic Village Water SystemYukon-Koyukuk Census Area175CommunitySurface water
16Allakaket Public Water SystemYukon-Koyukuk Census Area135CommunityGroundwater
17Blm Arctic Interagency Visitor CenterYukon-Koyukuk Census Area130Transient non-communityGroundwater
18Coldfoot CafeYukon-Koyukuk Census Area120Transient non-communityGroundwater
19The Inn at ColdfootYukon-Koyukuk Census Area120Transient non-communityGroundwater
20Circle WasheteriaYukon-Koyukuk Census Area110CommunityGroundwater
21Hughes Public Water SupplyYukon-Koyukuk Census Area107CommunityGroundwater under influence of surface water
22Anvik Water SystemYukon-Koyukuk Census Area96CommunityGroundwater
23Manley Community Water SystemYukon-Koyukuk Census Area95CommunityGroundwater
24Rampart WasheteriaYukon-Koyukuk Census Area88CommunityGroundwater
25Koyukuk Safewater FacilityYukon-Koyukuk Census Area85CommunityGroundwater
26Beaver Water SystemYukon-Koyukuk Census Area80CommunityGroundwater
27Monroes MonderosaYukon-Koyukuk Census Area78Transient non-communityGroundwater
28Chalkyitsik Village WaterYukon-Koyukuk Census Area76CommunitySurface water
29Takotna Water SystemYukon-Koyukuk Census Area70CommunitySurface water
30Shageluk Water SystemYukon-Koyukuk Census Area60CommunityGroundwater
31Yukon River CampYukon-Koyukuk Census Area59Transient non-communityGroundwater
32Yksd - Allakaket SchoolYukon-Koyukuk Census Area52Non-transient non-communityGroundwater under influence of surface water
33Yksd - Merreline Kangas / RubyYukon-Koyukuk Census Area40Non-transient non-communityGroundwater
34Stevens Village Water SystemYukon-Koyukuk Census Area28CommunityGroundwater

Yukon-Koyukuk Census Area County water systems: frequently asked questions

How many public water systems are in Yukon-Koyukuk Census Area County, Alaska?

EPA's SDWIS records file 34 active public water systems under Yukon-Koyukuk Census Area County, Alaska: 27 community systems (79%), 2 non-transient non-community systems (5.9%) and 5 transient non-community systems (15%).

Who supplies drinking water in Yukon-Koyukuk Census Area County, AK?

The largest community water systems filed under Yukon-Koyukuk Census Area County are Ft. Yukon Public Water System (665 people served), Galena Wtp1 - City (490 people served) and Nenana Municipal Water (486 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Yukon-Koyukuk Census Area County's drinking water come from groundwater or surface water?

Of the 34 active public water systems in Yukon-Koyukuk Census Area County, 82% draw mainly on groundwater and 18% on surface water, counting purchased supplies. The largest system, Ft. Yukon Public Water System, uses groundwater under influence of surface water.

Where can I find a water quality report for Yukon-Koyukuk Census Area County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 27 community systems are filed under Yukon-Koyukuk Census Area County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Yukon-Koyukuk Census Area County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Alaska water systems

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, “Public water systems in Yukon-Koyukuk Census Area County, Alaska”, https://aquacensus.com/water-systems/alaska/yukon-koyukuk-census-area (data as of October 1, 2026).