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Alaska Radon Map and Levels by Borough or Census Area

Alaska's boroughs and census areas span EPA Zones 2 and 3. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    18.2%

    17.5 pts below U.S.

    Alaska
    18.2%
    U.S.
    35.7%

    830 tests across 9 boroughs and census areas, 2008 to 2017

  • Rank among states

    40 of 47

    Ten lowest states

    Alaska
    18.2%
    North Dakota
    59.3%

    By share, every state pooled the same way, 2008 to 2017

  • Counties in EPA Zone 1

    0 of 25

    None at highest potential

    Zone 1
    0
    Zone 2
    5

    Most boroughs and census areas sit in Zone 3; Zone 1 is the highest potential

  • Highest borough or census area

    33.6%

    Fairbanks North Star Borough

    Fairbanks North Star Borough
    33.6%
    Anchorage Municipality
    7.2%

    Boroughs and census areas with 30+ tests, 2008 to 2017

Read a result for Alaska

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 18.2% of Alaska's reported tests reached 4 pCi/L, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Alaska, At a glance

Alaska at a glance

Predicted: EPA radon zone

25 of 29 boroughs and census areas classified

EPA classifies counties, not states. Of the 25 boroughs and census areas 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 boroughs and census areas · 17.2%
  • Zone 3: Lower predicted potentialless than 2 pCi/L20 of 29 boroughs and census areas · 69.0%
  • No zone on file4 of 29 boroughs and census areas · 13.8%

An EPA radon zone predicts a whole county. It is not intended to determine whether any individual home should be tested: homes with elevated levels occur in all three zones, and EPA recommends testing every home regardless of zone.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures, area by area

CDC publishes Alaska's radon test figures by borough or census area: 26 of its 29 boroughs and census areas have one. Each one's share is in the borough or census area list.

How to read these figures

Alaska, Compared

Alaska radon figures, compared

Calculated by Radon411
Alaska, 2008 to 2017, laboratory
18.2%
of 830 tests at or above 4 pCi/L, pooled
Against the U.S.
−17.5points
35.7% pooled
Rank among the states
40 of 47
1 is the highest share
Boroughs and census areas with 30 or more tests
4
Highest
33.6%
Fairbanks North Star Borough
Lowest
7.2%
Anchorage Municipality

Fewer reported tests reach 4 pCi/L in Alaska than in most states: 18.2% of 830 over the 2008 to 2017 laboratory totals, from 9 boroughs and census areas. Nationally the pooled share is 35.7%: 17.5 points higher than here. Among 47 states pooled the same way it ranks 40th, with South Carolina (19.4%) above it and Arizona (16.8%) below.

Fairbanks North Star Borough reports the highest share (33.6% of 241 tests) and Anchorage Municipality the lowest (7.2%); the most tests came from Anchorage Municipality, 428 of them at 7.2%. EPA's 1993 map puts 0 of its 25 classified boroughs and census areas in Zone 1; the tests reported since bear that out at 18.2%.

By band, 1 borough or census area at 30% to 50%, 2 boroughs and census areas at 15% to 30%, 1 borough or census area at 5% to 15%. Across its 4 overlapping ten-year totals, the share went from 22.5% (2005 to 2014) to 18.2% (2008 to 2017), down 4.3 points, with 2005 to 2014 the highest at 22.5%.

Alaska ranked among 47 states by pooled share of tests at or above 4 pCi/L, 2008 to 2017, laboratory
StateRankBoroughs and census areasTestsAt or above 4 pCi/L
Florida35 of 476253,79422.7%
North Carolina36 of 479973,13922.6%
Alabama37 of 476512,56921.9%
Vermont38 of 471410,60021.7%
South Carolina39 of 474626,48119.4%
Alaska40 of 47983018.2%
Arizona41 of 47133,58916.8%
Delaware42 of 47312,21416.7%
Oklahoma43 of 475281412.7%
California44 of 47569,41510.3%
Texas45 of 471384,61510.2%
Alaska's highest boroughs and census areas with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
Boroughs and census areaRankTestsAt or above 4 pCi/L
Fairbanks North Star Borough1 of 424133.6%
Kenai Peninsula Borough2 of 43225.0%
Matanuska-Susitna Borough3 of 410323.3%
Anchorage Municipality4 of 44287.2%
Alaska's boroughs and census areas with 30 or more tests, by their own share at or above 4 pCi/L, 2008 to 2017, laboratory
ShareBoroughs and census areasTheir testsFor example
50% or more00None
30% to 50%1241Fairbanks North Star Borough
15% to 30%2135Kenai Peninsula Borough, Matanuska-Susitna Borough
5% to 15%1428Anchorage Municipality
Under 5%00None
Alaska ten-year laboratory totals, pooled, against the United States
PeriodBoroughs and census areasTestsAt or above 4 pCi/LUnited StatesChange from the row before
2008 to 2017983018.2%35.7%−1.8 points
2007 to 20161078520.0%35.8%−1.5 points
2006 to 20151172721.5%36.3%−1.0 points
2005 to 20141168022.5%36.0%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period. CDC publishes no state or national figure.

Alaska, Boroughs and census areas

Alaska boroughs and census areas by EPA zone

Predicted

Alaska's radon map, then all 29 boroughs and census areas by EPA's zone, the highest reported share of tests at or above 4 pCi/L first; each has its own report.

Alaska radon map by borough: EPA radon zones. Map of Alaska's 29 counties shaded by EPA radon zone: Zone 2 in amber, Zone 3 in pale sand, grey where no zone is on file. 0 in Zone 1, 5 in Zone 2, 20 in Zone 3, 4 with no zone.
Alaska radon map by boroughEPA radon zones for Alaska's counties: 0 counties in Zone 1, 5 counties in Zone 2, 20 counties in Zone 3, 4 with no zone on file.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

The 4 highest in Alaska, 2008 to 2017

Zone 2: moderate predicted potential5

Local help

Alaska, Local resources

Local resources in Alaska

Who to ask in Alaska: its radon program, test kits and professionals.

What Alaska's program says
Phone
907-269-6401
Email
paul.goodfellow@alaska.gov

What it means

Alaska, Questions

Questions about radon in Alaska

Is radon a problem in Alaska?

EPA's Map of Radon Zones places 0 of the 29 Alaska boroughs and census areas it classifies in Zone 1, the highest predicted potential, 5 in Zone 2 and 20 in Zone 3. Pooled from 9 boroughs and census areas, 18.2% of the 830 radon tests reported to CDC over the 2008 to 2017 laboratory totals were at or above 4 pCi/L, 40th of 47 states.

Which Alaska counties have the highest radon?

By the share of reported tests at or above 4 pCi/L, 2008 to 2017, laboratory: Fairbanks North Star Borough 33.6% (241 tests), Kenai Peninsula Borough 25.0% (32 tests), Matanuska-Susitna Borough 23.3% (103 tests), Anchorage Municipality 7.2% (428 tests).

Which EPA region is Alaska in?

Alaska is in EPA Region 10: Pacific Northwest.

Products

Alaska, Products

Testing a home in Alaska

18.2% of the 830 tests reported to CDC for Alaska over the 2008 to 2017 laboratory totals reached 4 pCi/L: a short-term kit (2 to 90 days) gives a first answer in days, a long-term test the year-round average. A short-term kit (2 to 90 days) is the quick first check for a home in Alaska; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Alaska homes, compared

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