Skip to content
RADON411

Locations and reports

Radon Levels in Logan County, Kentucky

EPA puts Logan County in Zone 2, its middle radon zone, and 31.6% of its 79 reported radon tests (2008 to 2017, laboratory totals) were at or above 4 pCi/L. 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

  • Share at 4+ pCi/L

    31.6%

    12.1 pts below KY

    Logan
    31.6%
    Kentucky
    43.7%

    79 tests, 2008 to 2017

  • Median result

    2.4pCi/L

    Below action level

    Logan
    2.4 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    79

    42nd of 69 by tests

    Logan
    79
    Jefferson
    6,590

    Reported to CDC before any fix, 2008 to 2017

  • 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

  • Rank in Kentucky

    43 of 69

    Middle half

    Logan
    31.6%
    Meade
    68.4%

    By share, of 69 with 30+ tests

Read a result for Logan County

Starts at Logan County's median, 2.4 pCi/L

2.4pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 2.4 pCi/L

Between 2 and 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Logan County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Logan County, At a glance

Logan County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Logan 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 Logan County, 2008 to 2017, laboratory

Reported results by concentration band, Logan County, 2008 to 2017, laboratory
Under 2 pCi/L: 38%2 to 4 pCi/L: 30%4 pCi/L and above: 32%

Of 79 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Logan County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L3038.0%
2 to 4 pCi/L2430.4%
4 pCi/L and above2531.6%
What these figures count

These are the 79 tests reported to CDC for Logan County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not 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

Logan County, Compared

Logan County radon figures, compared

Calculated by Radon411

In Logan County, about 3 in 10 reported tests over the 2008 to 2017 laboratory totals (25 of 79) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 4.1 points lower. Across 120 Kentucky counties pooled together, 43.7% of tests reached that level, so Logan County runs 12.1 points below its state.

Of 4 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 17.7% (Todd County) to 61.5% (Warren County). By share, Logan County is 43rd of 69 Kentucky counties with 30 or more tests for the same period.

Half the tests came in under 2.4 pCi/L and half over it; the single highest reached 31.9 pCi/L. Below the action level, 30 tests (38.0%) came in under 2 pCi/L, against 33.2% statewide, and 24 tests (30.4%) fell between 2 and 4, against 23.1% statewide.

Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 31.6% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential.

CDC's ten-year totals for Logan County went from 76 tests (2005 to 2014) to 79 (2008 to 2017), the share going from 39.5% to 31.6%.

Logan County against Kentucky, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Logan County
Logan County7931.6%2.4 pCi/LThis county
Kentucky, pooled120 counties, pooled28,79343.7%Not pooled+12.1 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+4.1 points
Meade Countyhighest in the state11768.4%8.2 pCi/L+36.8 points
Hopkins Countylowest in the state429.5%1.7 pCi/L−22.1 points
Warren County, KYborders it1,62461.5%6.3 pCi/L+29.9 points
Simpson County, KYborders it12632.5%2.6 pCi/L+0.9 points
Robertson County, TNborders it27328.9%1.9 pCi/L−2.7 points
Todd County, KYborders it6217.7%1.8 pCi/L−13.9 points
Muhlenberg County, KYborders it1717.6%2.3 pCi/L−14.0 points
Butler County, KYborders it263.8%1.5 pCi/L−27.8 points
Where Logan County's reported results fell, 2008 to 2017, laboratory, beside Kentucky and the United States
ResultLogan County testsLogan County shareKentucky shareU.S. shareAgainst Kentucky
Under 2 pCi/L3038.0%33.2%39.6%+4.8 points
2 to 4 pCi/L2430.4%23.1%24.7%+7.3 points
4 pCi/L and above2531.6%43.7%35.7%−12.1 points
Logan County ranked among the 69 Kentucky counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Grant County38 of 697833.3%2.5 pCi/L
Casey County39 of 694332.6%3.1 pCi/L
Simpson County40 of 6912632.5%2.6 pCi/L
Green County41 of 693132.3%2.5 pCi/L
Carter County42 of 694131.7%2.2 pCi/L
Logan County43 of 697931.6%2.4 pCi/L
Spencer County44 of 6916631.3%2.5 pCi/L
Breckinridge County45 of 693231.3%2.5 pCi/L
Allen County46 of 695829.3%1.9 pCi/L
Clark County47 of 6923129.0%2.4 pCi/L
Grayson County48 of 693627.8%2.2 pCi/L
Logan County ten-year laboratory totals, against Kentucky's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestKentucky, pooledChange from the row before
2008 to 20177931.6%2.4 pCi/L31.9 pCi/L43.7%−5.9 points
2007 to 20168037.5%2.5 pCi/L55.7 pCi/L45.1%−0.8 points
2006 to 20158138.3%2.7 pCi/L55.7 pCi/L46.4%−1.2 points
2005 to 20147639.5%2.8 pCi/L55.7 pCi/L47.3%First on file

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

Logan County, Geology

The ground under Logan County

Predicted

USGS's geologic map puts all of Logan County's mapped land in one class: moderate radon potential. 97.4% of it lies in the area the map calls Mississippian Plateau, to which USGS gives a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Logan County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Mississippian PlateauMississippian marine limestones, dolomites, marine sandstones, siltstones, and shales.Moderate1197.4%
Western CoalfieldLimestones, shale, siltstone, and coal beds.Moderate92.3%

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

Logan County beside the ground around it

Across Kentucky 18.2% of the land is rated high; none of Logan County's is. Of the 6 counties that border it, 2 have more high-potential ground, Robertson County, TN the most at 3.4%.

Share of land by USGS radon potential: Logan County, the 6 counties bordering it and Kentucky
AreaEPA zoneLow potentialModerate potentialHigh potential
Logan CountyZone 2None100%None
Todd CountyZone 2None100%None
Simpson CountyZone 2None100%None
Robertson County, TNZone 2None96.6%3.4%
Butler CountyZone 2None100%None
Warren CountyZone 1None99.9%0.1%
Muhlenberg CountyZone 2None100%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

Logan County, Local resources

Radon testing and mitigation in Logan County

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

What it means

Logan County, Questions

Questions about radon in Logan County

Are radon levels high in Logan County?

Over the 2008 to 2017 laboratory totals, 31.6% of the radon tests reported to CDC for Logan County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.4 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 42 reported a higher share; pooled, the state comes to 43.7%.

Which counties border Logan County?

Logan County borders 6 counties: Todd County, KY, Simpson County, KY, Robertson County, TN, Butler County, KY, Warren County, KY and Muhlenberg County, KY.

Products

Logan County, Products

Testing a home in Logan County

In Logan County, 31.6% of 79 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.7% pooled across Kentucky. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Logan County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Logan County homes, compared

Explore

Logan County, Bordering counties

Counties bordering Logan County

Calculated by Radon411

Logan County, Cities and towns

Cities and towns in Logan County

The Census Bureau estimates 28,669 residents in Logan County for July 1, 2025, 1,154 more than in 2020 (+4.2%). That works out to 52 people per square mile of land. Its largest town, Russellville, has 7,454 residents, 26.0% of the total. Together its 4 incorporated places hold 37.9% of those residents; the other 62.1% live outside any of them. Reported testing is thin here: 79 tests over 2008 to 2017, or 2.8 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.

From Russellville to Lewisburg, CDC publishes no figure by town: each reads Logan County's.

The cities and towns in Logan County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Russellville7,454+3.7%26.0%
Auburn1,742+10.0%6.1%
Adairville884+4.9%3.1%
Lewisburg777+3.7%2.7%

4 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).

Logan County, Homes

Homes in Logan County

Logan County is a place of houses on their own lots: 78% of its 12,459 homes are detached single-family houses, against 68% across Kentucky. Half of its homes were built before 1977, close to Kentucky's 1982: 23% date from before 1960 and 16% from 2000 or later. Owners live in 75% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.

Homes in Logan County, Kentucky, 2019 to 2023
HomesLogan CountyKentucky
Housing units12,4592,010,655
Detached houses78%68%
In buildings of 5 or more3%12%
Mobile homes11%11%
Built before 196023%22%
Built since 200016%24%
Middle year built19771982
Owner-occupied75%68%

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