Radon levels in Alaska

Alaska is outside the national model's coverage (conterminous US only), so this page shows the EPA radon zone for each county. Zones are a 1993 county-level classification, not a measurement.

Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

0 / 30

EPA Zone 1 counties (0%)

5 / 25

Zone 2 / Zone 3 counties

-

counties predicted ≥ 4 pCi/L

-

of ZIP codes predicted ≥ 4 pCi/L

What the data says about radon in Alaska

Alaska is outside the conterminous US, so the Harvard/Emory national model publishes no ZIP-level predictions for it and this page cannot report a predicted average. What can be said from the data: 0 of 30 counties are EPA Zone 1, 5 Zone 2 and 25 Zone 3. The zone map is a 1993 county-level prediction, not a set of measurements, so the practical guidance is the same as everywhere: test the home you live in.

Alaska counties by predicted radon

Sorted highest to lowest predicted basement average (model estimate). 30 counties.

CountyPredicted basementUpstairsGradeEPA zoneZIPs
Aleutians East Boroughn/a-zone onlyEPA Zone 30
Aleutians West Census Arean/a-zone onlyEPA Zone 30
Anchorage Municipalityn/a-zone onlyEPA Zone 30
Bethel Census Arean/a-zone onlyEPA Zone 30
Bristol Bay Boroughn/a-zone onlyEPA Zone 30
Chugach Census Arean/a-zone onlyEPA Zone 30
Copper River Census Arean/a-zone onlyEPA Zone 30
Denali Boroughn/a-zone onlyEPA Zone 30
Dillingham Census Arean/a-zone onlyEPA Zone 30
Fairbanks North Star Boroughn/a-zone onlyEPA Zone 20
Haines Boroughn/a-zone onlyEPA Zone 30
Hoonah-Angoon Census Arean/a-zone onlyEPA Zone 30
Juneau City and Boroughn/a-zone onlyEPA Zone 30
Kenai Peninsula Boroughn/a-zone onlyEPA Zone 20
Ketchikan Gateway Boroughn/a-zone onlyEPA Zone 20
Kodiak Island Boroughn/a-zone onlyEPA Zone 30
Kusilvak Census Arean/a-zone onlyEPA Zone 30
Lake and Peninsula Boroughn/a-zone onlyEPA Zone 30
Matanuska-Susitna Boroughn/a-zone onlyEPA Zone 20
Nome Census Arean/a-zone onlyEPA Zone 30
North Slope Boroughn/a-zone onlyEPA Zone 30
Northwest Arctic Boroughn/a-zone onlyEPA Zone 30
Petersburg Boroughn/a-zone onlyEPA Zone 30
Prince of Wales-Hyder Census Arean/a-zone onlyEPA Zone 30
Sitka City and Boroughn/a-zone onlyEPA Zone 30
Skagway Municipalityn/a-zone onlyEPA Zone 30
Southeast Fairbanks Census Arean/a-zone onlyEPA Zone 20
Wrangell City and Boroughn/a-zone onlyEPA Zone 30
Yakutat City and Boroughn/a-zone onlyEPA Zone 30
Yukon-Koyukuk Census Arean/a-zone onlyEPA Zone 30

Radon levels in Alaska cities

The one most-populous Alaska place among the 1,000 largest US cities (Census incorporated places and CDPs), by population. City figures are ZIP-land-weighted means of the model's ZIP predictions (model estimate).

CityPopulationPredicted basementUpstairsGradeZIPs ≥ 4
Anchorage286,075n/a-zone only-

Alaska radon questions

Why are there no predicted radon values for Alaska?
The National Radon Exposure Model covers the conterminous United States only, so Alaska has no ZIP-level predictions. Each Alaska county is shown with its EPA radon zone (0 Zone 1, 5 Zone 2, 25 Zone 3). Testing is the only way to know a home's level.

Alaska radon program

State programs keep lists of certified testers and mitigators and sometimes run kit programs. We link only pages we could verify, and Alaska's program page did not respond when we checked, so start from the EPA state radon contacts page. Then read how to test and what mitigation costs.