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Radon Levels in Larue County, Kentucky

EPA puts Larue County in Zone 2, its middle radon zone, and high results are common there: 47.1% of the 34 radon tests reported to CDC (2008 to 2017, laboratory totals) came back 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

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  • Share at 4+ pCi/L

    47.1%

    3.4 pts above KY

    Larue
    47.1%
    Kentucky
    43.7%

    34 tests, 2008 to 2017

  • Median result

    3.7pCi/L

    Below action level

    Larue
    3.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    34

    63rd of 69 by tests

    Larue
    34
    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

    20 of 69

    Middle half

    Larue
    47.1%
    Meade
    68.4%

    By share, of 69 with 30+ tests

Read a result for Larue County

Starts at Larue County's median, 3.7 pCi/L

3.7pCi/L

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

EPA’s reading of 3.7 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. Larue County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Larue County, At a glance

Larue County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Larue 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 87% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Larue County, 2008 to 2017, laboratory
Under 2 pCi/L: 27%2 to 4 pCi/L: 26%4 pCi/L and above: 47%

Of 34 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Larue County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L926.5%
2 to 4 pCi/L926.5%
4 pCi/L and above1647.1%
What these figures count

These are the 34 tests reported to CDC for Larue 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

Larue County, Compared

Larue County radon figures, compared

Calculated by Radon411

In Larue County, about 5 in 10 reported tests over the 2008 to 2017 laboratory totals (16 of 34) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 11.4 points higher. Across 120 Kentucky counties pooled together, 43.7% of tests reached that level, so Larue County runs 3.4 points above its state.

Of 6 neighbours with a figure, 5 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 32.3% (Green County) to 66.1% (Nelson County). By share, Larue County is 20th of 69 Kentucky counties with 30 or more tests for the same period.

Half the tests came in under 3.7 pCi/L and half over it; the single highest reached 24.3 pCi/L. Below the action level, 9 tests (26.5%) came in under 2 pCi/L, against 33.2% statewide, and 9 tests (26.5%) 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 47.1% share point the same way here. USGS geology rates 87% of the county's land moderate radon potential.

CDC's ten-year totals for Larue County went from 29 tests (2005 to 2014) to 34 (2008 to 2017), the share going from 48.3% to 47.1%.

Larue County against Kentucky, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Larue County
Larue County3447.1%3.7 pCi/LThis county
Kentucky, pooled120 counties, pooled28,79343.7%Not pooled−3.4 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−11.4 points
Meade Countyhighest in the state11768.4%8.2 pCi/L+21.3 points
Hopkins Countylowest in the state429.5%1.7 pCi/L−37.6 points
Nelson County, KYborders it30466.1%6.3 pCi/L+19.0 points
Hart County, KYborders it8465.5%8.0 pCi/L+18.4 points
Taylor County, KYborders it9157.1%4.4 pCi/L+10.0 points
Hardin County, KYborders it42950.3%4.0 pCi/L+3.2 points
Marion County, KYborders it17748.6%3.9 pCi/L+1.5 points
Green County, KYborders it3132.3%2.5 pCi/L−14.8 points
Where Larue County's reported results fell, 2008 to 2017, laboratory, beside Kentucky and the United States
ResultLarue County testsLarue County shareKentucky shareU.S. shareAgainst Kentucky
Under 2 pCi/L926.5%33.2%39.6%−6.7 points
2 to 4 pCi/L926.5%23.1%24.7%+3.4 points
4 pCi/L and above1647.1%43.7%35.7%+3.4 points
Larue 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
Montgomery County15 of 6910551.4%4.1 pCi/L
Hardin County16 of 6942950.3%4.0 pCi/L
Marion County17 of 6917748.6%3.9 pCi/L
Bullitt County18 of 6955147.5%3.6 pCi/L
Clinton County19 of 694047.5%3.5 pCi/L
Larue County20 of 693447.1%3.7 pCi/L
Scott County21 of 6987546.9%3.6 pCi/L
Harrison County22 of 6911146.8%3.4 pCi/L
Metcalfe County23 of 693345.5%3.5 pCi/L
Estill County24 of 6917744.1%3.2 pCi/L
Adair County25 of 695343.4%3.8 pCi/L
Larue County ten-year laboratory totals, against Kentucky's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestKentucky, pooledChange from the row before
2008 to 20173447.1%3.7 pCi/L24.3 pCi/L43.7%−2.9 points
2007 to 20163450.0%4.3 pCi/L24.3 pCi/L45.1%Level
2006 to 20153050.0%4.3 pCi/L24.3 pCi/L46.4%+1.7 points
2005 to 20142948.3%3.7 pCi/L24.3 pCi/L47.3%First on file

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

Larue County, Geology

The ground under Larue County

Predicted

Most of the ground under Larue County is one class on USGS's geologic map: 87.1% of its land is moderate radon potential, with 12.9% high. The map puts 87.1% of Larue County in the area it calls Mississippian Plateau and 12.9% in New Albany-Chattanooga Shale. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 14, in the high band (12 to 17).

USGS's geologic areas under Larue County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Mississippian PlateauMississippian marine limestones, dolomites, marine sandstones, siltstones, and shales.Moderate1187.1%
New Albany-Chattanooga ShaleDevonian/Mississippian Black shale.High1412.9%

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

Larue County beside the ground around it

On high-potential ground Larue County is close to Kentucky as a whole: 12.9% of its land against 18.2%. Of the 6 counties that border it, 4 have more high-potential ground, Taylor County the most at 86.4%.

Share of land by USGS radon potential: Larue County, the 6 counties bordering it and Kentucky
AreaEPA zoneLow potentialModerate potentialHigh potential
Larue CountyZone 2None87.1%12.9%
Nelson CountyZone 1None45.9%54.1%
Hardin CountyZone 2None96.6%3.4%
Green CountyZone 1None33.4%66.5%
Marion CountyZone 1None32.3%67.7%
Hart CountyZone 1None100%None
Taylor CountyZone 1None13.6%86.4%
Kentucky120 counties, pooled by land areaVaries5.7%76.1%18.2%

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

Local help

Larue County, Local resources

Radon testing and mitigation in Larue County

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

What it means

Larue County, Questions

Questions about radon in Larue County

Are radon levels high in Larue County?

Over the 2008 to 2017 laboratory totals, 47.1% of the radon tests reported to CDC for Larue County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 19 reported a higher share; pooled, the state comes to 43.7%.

Which counties border Larue County?

Larue County borders 6 counties: Nelson County, Hardin County, Green County, Marion County, Hart County and Taylor County.

Products

Larue County, Products

Testing a home in Larue County

In Larue County, 47.1% of 34 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 Larue County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Larue County homes, compared

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Larue County, Bordering counties

Counties bordering Larue County

Calculated by Radon411

Larue County, Cities and towns

Cities and towns in Larue County

The Census Bureau estimates 15,184 residents in Larue County for July 1, 2025, 305 more than in 2020 (+2.0%). That works out to 58 people per square mile of land. Its largest town, Hodgenville, has 3,378 residents, 22.2% of the total. Reported testing is thin here: 34 tests over 2008 to 2017, or 2.2 for every 1,000 residents (2025 estimate), where Kentucky as a whole comes to 6.3.

From Hodgenville to Upton, CDC publishes no figure by town: each reads Larue County's.

The cities and towns in Larue County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Hodgenville3,378+0.9%22.2%
Uptonextends beyond Larue County702−0.8%Counted whole

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). A place that extends beyond Larue County is counted whole, so it has no share.

Larue County, Homes

Homes in Larue County

Larue County is a place of houses on their own lots: 83% of its 6,542 homes are detached single-family houses, against 68% across Kentucky. Half of its homes were built before 1981, close to Kentucky's 1982: 24% date from before 1960 and 23% from 2000 or later. Owners live in 76% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.

Homes in Larue County, Kentucky, 2019 to 2023
HomesLarue CountyKentucky
Housing units6,5422,010,655
Detached houses83%68%
In buildings of 5 or more2%12%
Mobile homes12%11%
Built before 196024%22%
Built since 200023%24%
Middle year built19811982
Owner-occupied76%68%

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