County · Alaska

Yukon-Koyukuk Census Area, Alaska: drinking water records

Name: Drinking water records for Yukon-Koyukuk Census Area, Alaska
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 27 community water systems across 32 ZIP codes in Yukon-Koyukuk Census Area, then find water-testing resources and available recent monitoring-station readings.

In focus27Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 0 of the 27 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 27 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	Health-based violations	Lead, 9 in 10 homes at or below
Galena WTP1 - City AK2360272	490	45	3.6 ppbbelow the action level
Mcgrath Water System AK2280155	341	23	0.9 ppbbelow the action level
Huslia Public Water System AK2300191	323	1	2.7 ppbbelow the action level
Too'Gha INC - in Tanana AK2360109	271	10	1.6 ppbbelow the action level
Nulato River Well AK2360785	245	2	2.3 ppbbelow the action level
Ruby Water System AK2360866	215	3	9 ppbbelow the action level
Kaltag Public Water System AK2360141	214	6	2.1 ppbbelow the action level
Grayling Water System AK2280066	207	43	2 ppbbelow the action level
Minto Community Water System AK2300159	205	10	0.3 ppbbelow the action level
Holy Cross Water System AK2280074	182	1	1.8 ppbbelow the action level
Venetie Water System AK2300248	181	2	1.4 ppbbelow the action level
Arctic Village Water System AK2300222	175	7	1.3 ppbbelow the action level
Allakaket Public Water System AK2300816	135	4	1.2 ppbbelow the action level
Circle Washeteria AK2300769	110	7	2.4 ppbbelow the action level
Hughes Public Water Supply AK2300272	107	3	2.6 ppbbelow the action level
Anvik Water System AK2280171	96	3	0.4 ppbbelow the action level
Rampart Washeteria AK2360816	88	6	3.4 ppbbelow the action level
Koyukuk Safewater Facility AK2360214	85	6	5.5 ppbbelow the action level
Chalkyitsik Village Water AK2300183	76	33	5.5 ppbbelow the action level
Shageluk Water System AK2280040	60	11	0.7 ppbbelow the action level
Stevens Village Water System AK2360442	28	1	4.5 ppbbelow the action level
Ft. Yukon Public Water System AK2360256	665	0	4.6 ppbbelow the action level
Nenana Municipal Water AK2390065	486	0	0.7 ppbbelow the action level
Galena WTP2 - Gila AK2360159	290	0	11 ppbbelow the action level
Manley Community Water System AK2300484	95	0	0 ppbbelow the action level
Beaver Water System AK2360230	80	0	9 ppbbelow the action level
Takotna Water System AK2280163	70	0	4.1 ppbbelow the action level

USGS · Monitoring stations

The water, more recently.

Available station readings in Yukon-Koyukuk Census Area, Alaska. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Yukon-Koyukuk Census Area

32ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Alatna
Anvik
Arctic Village
Beaver
Central
Chalkyitsik
Circle
Evansville
Fort Yukon
Galena
Grayling
Healy
Holy Cross
Hughes
Huslia
Kaltag
Koyukuk
Lake Minchumina
Livengood
Manley Hot Springs
McGrath
Minto
Nikolai
Nulato
Rampart
Ruby
Shageluk
Stevens Village
Takotna
Tanana
Venetie
Wiseman

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

99558Anvik
99590Grayling
99602Holy Cross
99627McGrath
99665Shageluk
99675Takotna
99691Nikolai
99701Wiseman
99720Alatna
99722Arctic Village
99724Beaver
99726Evansville
99730Central
99733Circle
99740Fort Yukon
99741Galena
99745Hughes
99746Huslia
99748Kaltag
99754Koyukuk
99756Manley Hot Springs
99757Lake Minchumina
99758Minto
99760Healy
99765Nulato
99767Rampart
99768Ruby
99774Stevens Village
99777Tanana
99781Venetie
99788Chalkyitsik
99790Livengood

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASReading PFAS survey resultsWhat a detection, a reporting level and a yearly average mean in EPA’s PFAS survey records.LeadChoosing a lead filter16 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Yukon-Koyukuk Census Area

All Alaska counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.