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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

Predicted
5 of 5counties in Zone 3, EPA's lowest predicted zone
Measured
No CDC figureCDC has published no radon test figures for Hawaii or its counties.
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

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 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.

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.

Hawaii, Counties

Hawaii counties by EPA zone

Predicted

Hawaii's radon map, then all 5 counties by the zone EPA predicts for each, 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.Predicted potential for each county, not a reading of any home. Homes with elevated levels of radon have been found 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.

Radon Action Brief

National Radon Action MonthPre-sale

The radon brief for your Hawaii county, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get your Hawaii county's BriefSee a free sample

Area data, not a test of the building.

What it means

Hawaii, Questions

Questions about radon in Hawaii

Common questions

8 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 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.

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, and that either approach takes only a small amount of time and effort. 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 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 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 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 Hawaii?

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.

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 and mitigation products

Whatever the figures for Hawaii show, only a test tells you about one home.

Test kits and monitors42

See all products

As an Amazon Associate, Radon411 earns from qualifying purchases.

Best radon monitors for Hawaii homes, compared

Testing

5

Mitigation

3

Explore

Hawaii, Next steps

What to do next

  1. LearnKnow what radon isWhat radon is, how it gets indoors, and why a county zone is not a reading for your home.Learn about radon
  2. TestTest the building you live inShort-term or long-term, where the device goes, and closed-house conditions.How to test
  3. FixBring a high level downHow a mitigation system works, and the retest that confirms it.How mitigation works
  4. Find a proHire a certified professionalMeasurement 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.