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Kentucky Radon Map and Levels by County

Kentucky's counties span all three EPA radon zones. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

Predicted
30 of 120counties in Zone 1, EPA's highest radon zone
Measured
By countyCDC publishes Kentucky's test figures by county: 120 of 120 counties have one.
Your home
Test to knowNo area figure here is a reading of your home.
How to test this homeFind a certified tester

The data

Kentucky, At a glance

Kentucky at a glance

Predicted: EPA radon zone

120 of 120 counties classified

EPA classifies counties, not states. Of the 120 counties in Kentucky with a zone, 30 are in Zone 1, 82 in Zone 2 and 8 in Zone 3.

  • Zone 1: Highest predicted potentialgreater than 4 pCi/L30 of 120 counties · 25.0%
  • Zone 2: Moderate predicted potential2 to 4 pCi/L82 of 120 counties · 68.3%
  • Zone 3: Lower predicted potentialless than 2 pCi/L8 of 120 counties · 6.7%

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, county by county

CDC publishes Kentucky's radon test figures by county: 120 of its 120 counties have one. Each one's share is in the county list.

Kentucky, Counties

Kentucky counties by EPA zone

Predicted

Kentucky's radon map, then all 120 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.

Kentucky radon map by county: EPA radon zones. Map of Kentucky's 120 counties shaded by EPA radon zone: Zone 1 in red-orange, Zone 2 in amber, Zone 3 in pale sand. 30 in Zone 1, 82 in Zone 2, 8 in Zone 3.
Kentucky radon map by countyEPA radon zones for Kentucky's counties: 30 counties in Zone 1, 82 counties in Zone 2, 8 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.

Zone 1: highest predicted potential30

Local help

Kentucky, Local resources

Local resources in Kentucky

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

What Kentucky's program says
Phone
502-782-2782
Email
Radon@ky.gov

Radon Action Brief

National Radon Action MonthPre-sale

The radon brief for your Kentucky 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 Kentucky county's BriefSee a free sample

Area data, not a test of the building.

What it means

Kentucky, Questions

Questions about radon in Kentucky

Common questions

9 questions, answered from the figures above

Is radon a problem in Kentucky?

EPA's Map of Radon Zones places 30 of the 120 Kentucky counties it classifies in Zone 1, the highest predicted potential, 82 in Zone 2 and 8 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.

Kentucky on the radon mapRadon levels by state

Which Kentucky counties are in EPA radon Zone 1?

30 counties are in Zone 1: Adair County, Allen County, Barren County, Bourbon County, Boyle County, Bullitt County, Casey County, Clark County, and 22 more in the county table on this page. Zone 1 is EPA's class for highest predicted potential, a predicted average indoor screening level greater than 4 pCi/L. A zone is a prediction for a county, not a measurement of any home.

Radon in Adair CountyRadon in Allen CountyRadon in Barren County

How do I get a radon test in Kentucky?

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 Kentucky 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 stateKentucky radon program

Who does radon mitigation in Kentucky?

Radon411's Kentucky directory lists 8 radon businesses for testing, mitigation or both, each with the licensing list it was read from. 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 Kentucky

Which Kentucky counties have the highest radon?

120 of Kentucky's 120 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 Kentucky are high?

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

Kentucky is in EPA Region 4: Southeast.

Do I need to test my home in Kentucky?

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 Kentucky?

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

Kentucky in figures

The figures above, said in words

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

    • Predicted

      Predicted

      EPA places 30 of Kentucky's 120 counties in Zone 1, 82 in Zone 2 and 8 in Zone 3.

      Zone 1 counties, A to Z, begin with Adair County, Allen County and Barren County; the county section below lists all 30.

    • Compared

      Calculated by Radon411

      25% of Kentucky'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 Kentucky on file here.

    120 of the 120 counties have a published county figure; the most tests in each one's latest year were reported for Jefferson County (6,590 tests over 2008 to 2017, laboratory), Fayette County (5,263 tests over 2008 to 2017, laboratory) and Warren County (1,624 tests over 2008 to 2017, laboratory).

  • Local record

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

    2 cities have a page setting the figures of the counties it lies in side by side: Lexington and Louisville.

Products

Kentucky, Products

Testing and mitigation products

Whatever the figures for Kentucky 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 Kentucky homes, compared

Testing

5

Mitigation

3

Explore

Cities in Kentucky with their own page

Radon data is published by county, not by city. Each city page sets the figures of the counties the city lies in side by side.

Kentucky, 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.