Locations and reports
Radon Levels in Alaska
What this means for you
- Your area: None of Alaska's 25 classified counties is in EPA Zone 1, the highest of its three radon zones. Zones are predictions for whole counties, and homes with elevated levels occur in all three zones.
- Local tests: CDC publishes Alaska's radon test results by county. Open your county below to see its figures.
- Your home: The only way to know your home’s level is to test it.
pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.
For Alaska, EPA's Map of Radon Zones places 0 of its 25 classified counties in Zone 1, highest predicted potential, a prediction for each county as a whole. Radon levels vary from home to home, so only a test measures the level in yours.
Predicted: EPA radon zone
25 of 29 counties classified
EPA classifies counties, not states. Of the 25 counties in Alaska with a zone, 5 are in Zone 2 and 20 in Zone 3. 4 have no zone on file.
- Zone 2: Moderate predicted potential2 to 4 pCi/L5 of 29 counties · 17.2%
- Zone 3: Lower predicted potentialless than 2 pCi/L20 of 29 counties · 69.0%
- No zone on file4 of 29 counties · 13.8%
An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.
This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
CDC publishes Alaska's radon test figures by county: 25 of its 29 counties have one. Each county's share is in the county list.
Alaska, In figures
Alaska in figures
What the published data says about Alaska, in words. A zone and a share of tests describe an area, never the level in any one home.
Predicted
PredictedEPA places 5 of Alaska's 29 counties in Zone 2 and 20 in Zone 3; 4 have no zone on file.
No Alaska county is in Zone 1.
Compared
Calculated by Radon4110% of Alaska's counties with a zone on file are in Zone 1, a smaller share than across all U.S. counties (34%). It is a share of counties, not of land, people or homes.
Reported tests
MeasuredCDC has no statewide testing figure for Alaska on file here.
25 of the 29 counties have a published county figure; the most tests in each one's latest year were reported for Anchorage (133 in 2022), Fairbanks North Star (80 in 2022) and Matanuska-Susitna (44 in 2022).
Alaska's radon program is the Alaska Radon Program, run by Alaska Division of Geological & Geophysical Surveys; its contacts are under Local resources.
Alaska, Counties
Alaska counties by EPA zone
PredictedAll 29 counties, by the zone EPA predicts for each. Every county has its own report.
Zone 2: moderate predicted potential5
- Fairbanks North Star19.4% of reported tests at or above 4 pCi/L, 2022
- Kenai Peninsula8.3% of reported tests at or above 4 pCi/L, 2022
- Ketchikan Gateway0.0% of reported tests at or above 4 pCi/L, 2021
- Matanuska-Susitna14.3% of reported tests at or above 4 pCi/L, 2022
- Southeast Fairbanks80.0% of reported tests at or above 4 pCi/L, 2022
Zone 3: lower predicted potential20
- Aleutians East0.0% of reported tests at or above 4 pCi/L, 2022
- Aleutians WestReported testing not yet available
- Anchorage3.1% of reported tests at or above 4 pCi/L, 2022
- Bethel11.1% of reported tests at or above 4 pCi/L, 2017
- Bristol BayReported testing not yet available
- Denali50.0% of reported tests at or above 4 pCi/L, 2022
- Dillingham0.0% of reported tests at or above 4 pCi/L, 2022
- Haines100.0% of reported tests at or above 4 pCi/L, 2022
- Juneau0.0% of reported tests at or above 4 pCi/L, 2022
- Kodiak Island0.0% of reported tests at or above 4 pCi/L, 2022
- KusilvakReported testing not yet available
- Lake and Peninsula0.0% of reported tests at or above 4 pCi/L, 2022
- Nome0.0% of reported tests at or above 4 pCi/L, 2022
- North Slope100.0% of reported tests at or above 4 pCi/L, 2016
- Northwest Arctic0.0% of reported tests at or above 4 pCi/L, 2021
- Sitka0.0% of reported tests at or above 4 pCi/L, 2022
- Skagway0.0% of reported tests at or above 4 pCi/L, 2022
- Valdez-CordovaReported testing not yet available
- YakutatReported testing not yet available
- Yukon-Koyukuk75.0% of reported tests at or above 4 pCi/L, 2019
Alaska, Local resources
Local resources in Alaska
Who to ask in Alaska: the state's radon program, test kits and professionals.
Alaska Radon Program
Alaska Division of Geological & Geophysical Surveys
Alaska’s radon program answers questions about testing, mitigation and the rules where you live.
- Phone
- 907-269-6401
- paul.goodfellow@alaska.gov
Test kits
The program says: Please register your interest in a free radon testing kit on our website and we will resume mailing out tests starting in December 2026.
Radon professionals
No professionals are listed in Alaska yet. The state program can point you to registered testers and mitigators.
See the Alaska directoryAlaska, Questions
Questions about radon in Alaska
Common questions8 questions, answered from the figures above
Is radon a problem in Alaska?
EPA's Map of Radon Zones places 0 of the 29 Alaska counties it classifies in Zone 1, the highest predicted potential, 5 in Zone 2 and 20 in Zone 3. An EPA radon zone describes predicted potential across a whole county. It is not intended to determine whether any individual home should be tested, and homes with elevated levels occur in all three zones. EPA recommends testing every home regardless of zone, and testing is the only way to know the radon level in a specific building.
How do I get a radon test in Alaska?
EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. The Alaska radon program is the place to ask about certified testers and any test kit offer it runs.
How to test a homeFree and low-cost kits by stateAlaska radon program
Who does radon mitigation in Alaska?
Radon411 has no certified mitigators listed for Alaska yet. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional.
How radon mitigation worksWhat mitigation costsRadon professionals in Alaska
Which Alaska counties have the highest radon?
25 of Alaska's 29 counties have an EPA radon zone published here. The remaining 4 have none on file. Radon411 will not rank counties on data it does not hold, and a zone is a prediction for an area rather than a measurement of any building.
What share of radon tests in Alaska are high?
CDC has published no statewide radon testing statistics for Alaska, so we cannot give a figure. Where CDC does publish one, the percentage describes radon tests reported to CDC, not homes.
Which EPA region is Alaska in?
Alaska is in EPA Region 10: Pacific Northwest.
Do I need to test my home in Alaska?
Yes, wherever you live in the state. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L.
Why does this page show coverage rather than one radon level for Alaska?
A statewide figure averages counties with very different geology and very different numbers of reported tests, so it hides more than it shows. The county report is the level at which the EPA zone, the geologic potential and the reported testing statistics are actually published, which is why the county table above links to every one of them.
What these figures mean if you own, buy, sell or rent
The zone counts on this page describe counties across Alaska. They are predictions for areas, and none of them measures your building.
- How to test a home
If you own your home
Test the lowest lived-in level; a short-term kit screens in days, a long-term kit reflects the year.
- Buying a house: radon guide
If you are buying
Ask for past results and any system's post-mitigation test, and test during the sale.
- Selling a house: radon guide
If you are selling
Testing before you list puts the timing in your hands; disclosure rules differ by state.
- Radon in rental homes
If you rent, or rent out a home
A tenant can test; a fix is the owner's to make, and duties differ by state.
How long a test has to run, under what conditions, and what EPA says a result means: the testing standard, in full.
Alaska, Products
Testing and mitigation products
Whatever the figures for Alaska show, only a test tells you about one home.
Testing
- Short-term test kitsPassive detectors exposed for a few days under closed-building conditions, then analyzed by a lab.
- Long-term test kitsDetectors exposed for more than 90 days, for a closer picture of the annual average.
- Continuous monitorsPowered devices that log radon on a repeating cycle, often used for transaction tests.
- Digital detectorsConsumer devices that display a running radon reading without a lab.
- Water radon testsKits for radon dissolved in well water, analyzed by a lab.
Mitigation
- Mitigation fansThe inline fan that keeps a soil depressurization system running, sized by the installer.
- System indicatorsU-tube manometers and fan alarms that show whether a mitigation system is still working.
- Sealing materialsCrack, joint and sump sealing used alongside a mitigation system, not instead of one.
Alaska / Next steps
What to do next
Learn
Know what radon is
What radon is, how it gets indoors, and why a county zone is not a reading for your home.
Learn about radonTest
Test the building you live in
Short-term or long-term, where the device goes, and closed-house conditions.
How to testFix
Bring a high level down
How a mitigation system works, and the retest that confirms it.
How mitigation worksFind a pro
Hire a certified professional
Measurement and mitigation professionals by state, with their certifications.
Find a professional
Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.