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District of Columbia Radon Map and Levels

EPA puts District of Columbia in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
Zone 3Lower predicted potential
Measured
8.7%of tests reported to CDC (2008 to 2017, laboratory) were at or above 4 pCi/L
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

District of Columbia, At a glance

District of Columbia at a glance

Predicted: EPA radon zone

EPA Zone 3

EPA classifies counties, not states. District of Columbia is one county-level area, and EPA puts it 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.

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

CDC test figures for its one area

CDC publishes District of Columbia's radon test figures for its one county-level area. They are in the county list.

District of Columbia, Counties

District of Columbia by EPA zone

Predicted

District of Columbia is one county-level area, and it has its own county report.

District of Columbia radon map: EPA radon zones. Map of District of Columbia's 1 county shaded by EPA radon zone: Zone 3 in pale sand. 0 in Zone 1, 0 in Zone 2, 1 in Zone 3.
District of Columbia radon mapEPA radon zones for District of Columbia's counties: 0 counties in Zone 1, 0 counties in Zone 2, 1 county 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.

Zone 3: lower predicted potential1

Local help

District of Columbia, Local resources

Local resources in District of Columbia

Who to ask in District of Columbia: its radon program, test kits and professionals.

What District of Columbia's program says
Phone
(202) 535-2302

Radon Action Brief

National Radon Action MonthPre-sale

District of Columbia's radon brief, 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 the District of Columbia BriefSee a free sample

Area data, not a test of the building.

What it means

District of Columbia, Questions

Questions about radon in District of Columbia

Common questions

8 questions, answered from the figures above

Is radon a problem in District of Columbia?

EPA's Map of Radon Zones places District of Columbia, one county-level area, in Zone 3, lower predicted potential. 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.

District of Columbia on the radon mapRadon levels by state

How do I get a radon test in District of Columbia?

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 District of Columbia 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 stateDistrict of Columbia radon program

Who does radon mitigation in District of Columbia?

Radon411 has no radon business listed for District of Columbia 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 District of Columbia

Which District of Columbia counties have the highest radon?

District of Columbia is one county-level area, and its EPA radon zone is 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 District of Columbia are high?

CDC has published no statewide radon testing statistics for District of Columbia, 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 District of Columbia in?

District of Columbia is in EPA Region 3: Mid-Atlantic.

Do I need to test my home in District of Columbia?

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 District of Columbia?

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 District of Columbia. They are predictions for areas, and none of them measures your building.

District of Columbia in figures

The figures above, said in words

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

    • Predicted

      Predicted

      EPA places District of Columbia, one county-level area, in Zone 3.

      No District of Columbia county is in Zone 1.

    • Compared

      Calculated by Radon411

      0% of District of Columbia'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 District of Columbia on file here.

    1 of the 1 county has a published county figure; the most tests in each one's latest year were reported for District of Columbia (2,126 tests over 2008 to 2017, laboratory).

District of Columbia's radon program is the Radon Test Kit Program; its contacts are under Local resources.

Products

District of Columbia, Products

Testing and mitigation products

Whatever the figures for District of Columbia 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 District of Columbia homes, compared

Testing

5

Mitigation

3

Explore

District of Columbia, 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.