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Radon Levels in Martin County, Kentucky

EPA puts Martin County in Zone 2, its middle radon zone, and only 2 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Highest bordering

    17.1%

    Pike County

    Pike
    17.1%

    1 of 6 neighbours have 30+ tests, 2008 to 2017

  • Nearest county

    17.1%

    Pike County, 24 miles

    Pike
    17.1%
    Kentucky
    43.7%

    Share at 4+ pCi/L, 82 tests, 2008 to 2017

  • Ground above low

    99.9%

    5.6 pts above Kentucky

    Martin
    99.9%
    Kentucky
    94.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    2

    Too few for a share

    Martin
    2
    Needed
    30

    2008 to 2017, laboratory

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

Read a result for Martin County

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

Martin County, At a glance

Martin County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Martin County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Martin County, 2008 to 2017, laboratory

CDC holds 2 reported tests for Martin County over the 2008 to 2017 laboratory totals, with a median of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Martin County beside the counties around it is how this page reads it.

What these figures count

Only 2 tests were reported to CDC for Martin County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Martin County, Compared

Martin County radon figures, compared

Calculated by Radon411

CDC's largest figure for Martin County rests on 2 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 50.0 points and no rank or comparison is drawn from it. Results reached as high as 0.1 pCi/L, with a middle value of 0.1 pCi/L.

Pike County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 17.1% of its tests at or above 4 pCi/L. Farther out, Boyd County (40 miles away) at 17.9%, Carter County (46 miles away) at 31.7% and Breathitt County (48 miles away) at 19.1% have figures too. Pooled across 120 Kentucky counties, 43.7% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%). EPA's 1993 map puts Martin County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Kentucky, the United States and the counties around Martin County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
Kentucky, pooled120 counties, pooled28,79343.7%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Meade Countyhighest in the state11768.4%8.2 pCi/L
Hopkins Countylowest in the state429.5%1.7 pCi/L
Floyd County, KYborders it2040.0%2.7 pCi/L
Pike County, KYborders it8217.1%1.1 pCi/L
Wayne County, WVborders it1915.8%1.7 pCi/L
Johnson County, KYborders it280.0%0.8 pCi/L
Lawrence County, KYborders it90.0%1.7 pCi/L
Mingo County, WVborders it50.0%1.0 pCi/L
The nearest Kentucky counties to Martin County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Pike County24 mi8217.1%1.1 pCi/L
Boyd County40 mi16817.9%2.1 pCi/L
Carter County46 mi4131.7%2.2 pCi/L
Breathitt County48 mi4719.1%1.7 pCi/L
Greenup County56 mi10412.5%2.0 pCi/L
Rowan County57 mi7418.9%1.6 pCi/L
Menifee County60 mi4122.0%1.4 pCi/L
Montgomery County78 mi10551.4%4.1 pCi/L
Martin County ten-year laboratory totals, against Kentucky's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestKentucky, pooledChange from the row before
2008 to 201720.0%0.1 pCi/L0.1 pCi/L43.7%Level
2007 to 201610.0%0.1 pCi/L0.1 pCi/L45.1%Level
2006 to 201510.0%0.1 pCi/L0.1 pCi/L46.4%Level
2005 to 201410.0%0.1 pCi/L0.1 pCi/L47.3%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Martin County, Geology

The ground under Martin County

Predicted

Most of the ground under Martin County is one class on USGS's geologic map: 99.9% of its land is moderate radon potential, with 0.1% low. All of it lies in the area the map calls Cumberland Plateau, to which USGS gives a radon index of 9, in the moderate band (9 to 11).

USGS's geologic areas under Martin County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Cumberland PlateauPennsylvanian sandstones, siltstones, and shales.Moderate999.9%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Martin County beside the ground around it

Across Kentucky 18.2% of the land is rated high; none of Martin County's is. Of the 6 counties that border it, 3 have more moderate-potential ground, Floyd County the most at 100%.

Share of land by USGS radon potential: Martin County, the 6 counties bordering it and Kentucky
AreaEPA zoneLow potentialModerate potentialHigh potential
Martin CountyZone 20.1%99.9%None
Mingo County, WVZone 398.8%1.2%None
Johnson CountyZone 2None100%None
Wayne County, WVZone 214.1%85.9%None
Lawrence CountyZone 2None100%None
Floyd CountyZone 2None100%None
Pike CountyZone 20.1%99.9%None
Kentucky120 counties, pooled by land areaVaries5.7%76.1%18.2%

The map rates the ground, not the air in any home.

Local help

Martin County, Local resources

Radon testing and mitigation in Martin County

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

What it means

Martin County, Questions

Questions about radon in Martin County

Are radon levels high in Martin County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Martin County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Pike County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 17.1% of its tests at or above 4 pCi/L.

Which counties border Martin County?

Martin County borders 6 counties: Mingo County, WV, Johnson County, KY, Wayne County, WV, Lawrence County, KY, Floyd County, KY and Pike County, KY.

Products

Martin County, Products

Testing a home in Martin County

No CDC figure names Martin County; the nearest county with one, Pike County (24 miles away), reported 17.1% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Martin County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Martin County homes, compared

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Martin County, Bordering counties

Counties bordering Martin County

Calculated by Radon411

Martin County, Cities and towns

Cities and towns in Martin County

About 10,697 people live in Martin County by the Census Bureau's estimate for July 1, 2025, 555 fewer than in 2020 (−4.9%). That works out to 47 people per square mile of land. No town dominates: Inez, the largest, has 515 residents, 4.8% of the total. Together its 2 incorporated places hold 7.0% of those residents; the other 93.0% live outside any of them. Reported testing is thin here: 2 tests over 2008 to 2017, or 0.2 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.

From Inez to Warfield, CDC publishes no figure by town: each reads Martin County's.

The cities and towns in Martin County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Inez515−5.2%4.8%
Warfield236−7.8%2.2%

2 incorporated places, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Martin County, Homes

Homes in Martin County

Mobile homes are 38% of Martin County's 4,847 homes and detached houses 55%, against 68% across Kentucky. Half of its homes were built before 1984, close to Kentucky's 1982: 11% date from before 1960 and 21% from 2000 or later. Owners live in 80% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.

Homes in Martin County, Kentucky, 2019 to 2023
HomesMartin CountyKentucky
Housing units4,8472,010,655
Detached houses55%68%
In buildings of 5 or more3%12%
Mobile homes38%11%
Built before 196011%22%
Built since 200021%24%
Middle year built19841982
Owner-occupied80%68%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.