Skip to content
RADON411

Locations and reports

Radon Levels in Anderson County, Kentucky

EPA puts Anderson County in Zone 2, its middle radon zone, and 25.2% of its 226 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

    25.2%

    18.5 pts below KY

    Anderson
    25.2%
    Kentucky
    43.7%

    226 tests, 2008 to 2017

  • Median result

    2.2pCi/L

    Below action level

    Anderson
    2.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    226

    21st of 69 by tests

    Anderson
    226
    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

    53 of 69

    Lowest quarter

    Anderson
    25.2%
    Meade
    68.4%

    By share, of 69 with 30+ tests

Read a result for Anderson County

Starts at Anderson County's median, 2.2 pCi/L

2.2pCi/L

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

EPA’s reading of 2.2 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. Anderson County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Anderson County, At a glance

Anderson County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Anderson 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 69% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Anderson County, 2008 to 2017, laboratory
Under 2 pCi/L: 44%2 to 4 pCi/L: 31%4 pCi/L and above: 25%

Of 226 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Anderson County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L9843.4%
2 to 4 pCi/L7131.4%
4 pCi/L and above5725.2%
What these figures count

These are the 226 tests reported to CDC for Anderson 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

Anderson County, Compared

Anderson County radon figures, compared

Calculated by Radon411

Anderson County's 226 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 23.2 pCi/L, and 25.2% reached 4 pCi/L. Kentucky as a whole (120 Kentucky counties, pooled) comes to 43.7%: 18.5 points higher than here.

Among its state's counties it ranks 53rd of 69 Kentucky counties with 30 or more tests for the same period. Statewide for the same period, Meade County reported the highest share (68.4%) and Hopkins County the lowest (9.5%).

Below the action level, 98 tests (43.4%) came in under 2 pCi/L, against 33.2% statewide, and 71 tests (31.4%) fell between 2 and 4, against 23.1% statewide. CDC's ten-year totals for Anderson County went from 179 tests (2005 to 2014) to 226 (2008 to 2017), the share going from 23.5% to 25.2%.

EPA's 1993 zone map puts Anderson County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 69% of the county's land moderate radon potential.

Next door, the shares run from 27.3% in Washington County to 66.1% in Nelson County.

CDC also counts 9 tests taken after mitigation in Anderson County for the same period: tests in homes where a fix was already in.

Anderson County against Kentucky, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Anderson County
Anderson County22625.2%2.2 pCi/LThis county
Kentucky, pooled120 counties, pooled28,79343.7%Not pooled+18.5 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+10.5 points
Meade Countyhighest in the state11768.4%8.2 pCi/L+43.2 points
Hopkins Countylowest in the state429.5%1.7 pCi/L−15.7 points
Nelson County, KYborders it30466.1%6.3 pCi/L+40.9 points
Woodford County, KYborders it34257.9%4.9 pCi/L+32.7 points
Franklin County, KYborders it81043.1%3.3 pCi/L+17.9 points
Mercer County, KYborders it28838.2%2.7 pCi/L+13.0 points
Shelby County, KYborders it40737.6%3.0 pCi/L+12.4 points
Spencer County, KYborders it16631.3%2.5 pCi/L+6.1 points
Washington County, KYborders it4427.3%2.4 pCi/L+2.1 points
Where Anderson County's reported results fell, 2008 to 2017, laboratory, beside Kentucky and the United States
ResultAnderson County testsAnderson County shareKentucky shareU.S. shareAgainst Kentucky
Under 2 pCi/L9843.4%33.2%39.6%+10.2 points
2 to 4 pCi/L7131.4%23.1%24.7%+8.3 points
4 pCi/L and above5725.2%43.7%35.7%−18.5 points
Anderson 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
Grayson County48 of 693627.8%2.2 pCi/L
Washington County49 of 694427.3%2.4 pCi/L
Pendleton County50 of 693426.5%1.9 pCi/L
Campbell County51 of 6954326.2%2.3 pCi/L
Kenton County52 of 691,16726.0%2.3 pCi/L
Anderson County53 of 6922625.2%2.2 pCi/L
Mason County54 of 693225.0%2.6 pCi/L
Russell County54 of 693225.0%2.9 pCi/L
Henderson County56 of 695424.1%2.3 pCi/L
Trigg County57 of 694522.2%2.4 pCi/L
Laurel County58 of 6910022.0%1.9 pCi/L
Anderson County ten-year laboratory totals, against Kentucky's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestKentucky, pooledChange from the row before
2008 to 201722625.2%2.2 pCi/L23.2 pCi/L43.7%−0.4 points
2007 to 201621925.6%2.2 pCi/L23.2 pCi/L45.1%+1.2 points
2006 to 201520124.4%2.2 pCi/L23.2 pCi/L46.4%+0.9 points
2005 to 201417923.5%2.0 pCi/L23.2 pCi/L47.3%First on file

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

Anderson County, Geology

The ground under Anderson County

Predicted

USGS's geologic map splits Anderson County: 69.0% of its land is moderate radon potential and 31.0% high. The map puts 69.0% of Anderson County in the area it calls Outer Bluegrass and 31.0% in Inner Bluegrass. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 13, in the high band (12 to 17).

USGS's geologic areas under Anderson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Outer BluegrassOrdovician-Devonian limestone and shale.Moderate1169.0%
Inner BluegrassOrdovician limestones, dolomites and shales.High1331.0%

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

Anderson County beside the ground around it

Anderson County has more high-potential ground than Kentucky as a whole: 31.0% of its land against 18.2%. Of the 7 counties that border it, 4 have more high-potential ground, Woodford County the most at 100%.

Share of land by USGS radon potential: Anderson County, the 7 counties bordering it and Kentucky
AreaEPA zoneLow potentialModerate potentialHigh potential
Anderson CountyZone 2None69.0%31.0%
Woodford CountyZone 1NoneNone100%
Mercer CountyZone 1None39.8%60.2%
Franklin CountyZone 1None33.2%66.8%
Shelby CountyZone 2None100%None
Spencer CountyZone 2None100%None
Washington CountyZone 2None100%None
Nelson CountyZone 1None45.9%54.1%
Kentucky120 counties, pooled by land areaVaries5.7%76.1%18.2%

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

Local help

Anderson County, Local resources

Radon testing and mitigation in Anderson County

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

What it means

Anderson County, Questions

Questions about radon in Anderson County

Are radon levels high in Anderson County?

Over the 2008 to 2017 laboratory totals, 25.2% of the radon tests reported to CDC for Anderson County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 52 reported a higher share; pooled, the state comes to 43.7%.

Which counties border Anderson County?

Anderson County borders 7 counties: Woodford County, Mercer County, Franklin County, Shelby County, Spencer County, Washington County and Nelson County.

Products

Anderson County, Products

Testing a home in Anderson County

In Anderson County, 25.2% of 226 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 Anderson County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Anderson County homes, compared

Explore

Anderson County, Bordering counties

Counties bordering Anderson County

Calculated by Radon411

Anderson County, Cities and towns

Cities and towns in Anderson County

Anderson County is growing: the Census Bureau puts it at 25,225 residents on July 1, 2025, up 5.5% from 23,902 in 2020. That works out to 125 people per square mile of land. Lawrenceburg, its one incorporated place, has 12,329 residents, 48.9% of the total. CDC's 226 reported tests for 2008 to 2017 work out to 9.0 per 1,000 residents (2025 estimate), close to Kentucky's 6.3.

Lawrenceburg is the one incorporated place here; CDC publishes no figure by town, so it reads Anderson County's.

Lawrenceburg, Anderson County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Lawrenceburg12,329+5.0%48.9%

One incorporated place, 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).

Anderson County, Homes

Homes in Anderson County

Anderson County is a place of houses on their own lots: 82% of its 10,196 homes are detached single-family houses, against 68% across Kentucky. Half of its homes were built before 1989, close to Kentucky's 1982: 16% date from before 1960 and 23% from 2000 or later. Owners live in 78% of the occupied homes (Kentucky: 68%), so for most households a test and a fix are their own to order.

Homes in Anderson County, Kentucky, 2019 to 2023
HomesAnderson CountyKentucky
Housing units10,1962,010,655
Detached houses82%68%
In buildings of 5 or more1%12%
Mobile homes6%11%
Built before 196016%22%
Built since 200023%24%
Middle year built19891982
Owner-occupied78%68%

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