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Hawaii Radon Map and Levels by County

EPA puts all of Hawaii's classified counties in Zone 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

  • Counties in EPA Zone 1

    0 of 5

    None at highest potential

    Zone 1
    0
    Zone 2
    0

    Most counties sit in Zone 3; Zone 1 is the highest potential

Read a result for Hawaii

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.

Interpret this readingWhat a fix costs

The data

Hawaii, At a glance

Hawaii at a glance

Predicted: EPA radon zone

5 of 5 counties classified

EPA classifies counties, not states. Of the 5 counties in Hawaii with a zone, 5 are in Zone 3.

  • Zone 3: Lower predicted potentialless than 2 pCi/L5 of 5 counties · 100.0%

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

No CDC test figures here

CDC has published no radon test figures for Hawaii or its counties. Only a test tells you the level in a home.

How to read these figures

Hawaii, Counties

Hawaii counties by EPA zone

Predicted

Hawaii's radon map, then all 5 counties by EPA's zone, the highest reported share of tests at or above 4 pCi/L first; each has its own report.

Hawaii radon map by county: EPA radon zones. Map of Hawaii's 5 counties shaded by EPA radon zone: Zone 3 in pale sand. 0 in Zone 1, 0 in Zone 2, 5 in Zone 3.
Hawaii radon map by countyEPA radon zones for Hawaii's counties: 0 counties in Zone 1, 0 counties in Zone 2, 5 counties in Zone 3.A prediction for each county, not a reading of any home; elevated homes occur in all three zones.

Local help

Hawaii, Local resources

Local resources in Hawaii

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

What it means

Hawaii, Questions

Questions about radon in Hawaii

Common questions

7 questions, answered from the figures above

Is radon a problem in Hawaii?

EPA's Map of Radon Zones places 0 of the 5 Hawaii counties it classifies in Zone 1, the highest predicted potential, 0 in Zone 2 and 5 in Zone 3. 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.

Hawaii on the radon mapRadon levels by state

How do I get a radon test in Hawaii?

EPA says you can test your home yourself or hire a qualified radon test company. The Hawaii 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 stateHawaii radon program

Who does radon mitigation in Hawaii?

Radon411 has no radon business listed for Hawaii yet. EPA recommends a qualified contractor for the fix, and some states require a licensed or certified professional.

How radon mitigation worksWhat mitigation costsRadon professionals in Hawaii

Which Hawaii counties have the highest radon?

5 of Hawaii's 5 counties have an EPA radon zone published here. 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 Hawaii are high?

CDC has published no statewide radon testing statistics for Hawaii, 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 Hawaii in?

Hawaii is in EPA Region 9: Pacific Southwest.

Do I need to test my home in Hawaii?

Yes, wherever you live in Hawaii. 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.

If you own, buy, sell or rent

What these figures mean for each reader, with the guide that covers it

The zone counts on this page describe counties across Hawaii. They are predictions for areas, and none of them measures your building.

Hawaii in figures

The figures above, said in words

What the published data says about Hawaii, in words. A zone and a share of tests describe an area, never the level in any one home.

    • Predicted

      Predicted

      EPA places 5 of Hawaii's 5 counties in Zone 3.

      No Hawaii county is in Zone 1.

    • Compared

      Calculated by Radon411

      0% of Hawaii'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

    Measured

    CDC has no statewide testing figure for Hawaii on file here.

    No Hawaii county has a published CDC county figure on file here.

Hawaii's radon program and its page are under Local resources.

Products

Hawaii, Products

Testing a home in Hawaii

A short-term kit (2 to 90 days) is the quick first check for a home in Hawaii; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Hawaii homes, compared

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