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Radon Levels in Scott County, Kentucky

EPA puts Scott County in Zone 1, its highest radon zone, and high results are common there: 46.9% of the 875 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

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    46.9%

    3.2 pts above KY

    Scott
    46.9%
    Kentucky
    43.7%

    875 tests, 2008 to 2017

  • Median result

    3.6pCi/L

    Below action level

    Scott
    3.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    875

    6th of 69 by tests

    Scott
    875
    Jefferson
    6,590

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Kentucky

    21 of 69

    Middle half

    Scott
    46.9%
    Meade
    68.4%

    By share, of 69 with 30+ tests

Read a result for Scott County

Starts at Scott County's median, 3.6 pCi/L

3.6pCi/L

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

EPA’s reading of 3.6 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. Scott County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Scott County, At a glance

Scott County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Scott County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 51% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Scott County, 2008 to 2017, laboratory
Under 2 pCi/L: 29%2 to 4 pCi/L: 24%4 pCi/L and above: 47%

Of 875 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Scott County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L25328.9%
2 to 4 pCi/L21224.2%
4 pCi/L and above41046.9%
What these figures count

These are the 875 tests reported to CDC for Scott 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

Scott County, Compared

Scott County radon figures, compared

Calculated by Radon411

In Scott County, about 5 in 10 reported tests over the 2008 to 2017 laboratory totals (410 of 875) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 11.2 points higher. Across 120 Kentucky counties pooled together, 43.7% of tests reached that level, so Scott County runs 3.2 points above its state.

Of 7 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 4 a smaller one; the spread is 33.3% (Grant County) to 57.9% (Woodford County). By share, Scott County is 21st of 69 Kentucky counties with 30 or more tests for the same period.

Half the tests came in under 3.6 pCi/L and half over it; the single highest reached 438.4 pCi/L. Below the action level, 253 tests (28.9%) came in under 2 pCi/L, against 33.2% statewide, and 212 tests (24.2%) fell between 2 and 4, against 23.1% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 46.9% share point the same way here. USGS geology rates 51% of the county's land high radon potential. CDC also counts 56 tests taken after mitigation in Scott County for the same period: tests in homes where a fix was already in.

CDC's ten-year totals for Scott County went from 635 tests (2005 to 2014) to 875 (2008 to 2017), the share going from 48.3% to 46.9%.

Scott County against Kentucky, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Scott County
Scott County87546.9%3.6 pCi/LThis county
Kentucky, pooled120 counties, pooled28,79343.7%Not pooled−3.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−11.2 points
Meade Countyhighest in the state11768.4%8.2 pCi/L+21.5 points
Hopkins Countylowest in the state429.5%1.7 pCi/L−37.4 points
Woodford County, KYborders it34257.9%4.9 pCi/L+11.0 points
Fayette County, KYborders it5,26354.5%4.5 pCi/L+7.6 points
Bourbon County, KYborders it12753.5%4.8 pCi/L+6.6 points
Harrison County, KYborders it11146.8%3.4 pCi/L−0.1 points
Franklin County, KYborders it81043.1%3.3 pCi/L−3.8 points
Owen County, KYborders it5836.2%2.5 pCi/L−10.7 points
Grant County, KYborders it7833.3%2.5 pCi/L−13.6 points
Where Scott County's reported results fell, 2008 to 2017, laboratory, beside Kentucky and the United States
ResultScott County testsScott County shareKentucky shareU.S. shareAgainst Kentucky
Under 2 pCi/L25328.9%33.2%39.6%−4.3 points
2 to 4 pCi/L21224.2%23.1%24.7%+1.1 points
4 pCi/L and above41046.9%43.7%35.7%+3.2 points
Scott 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
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
Franklin County26 of 6981043.1%3.3 pCi/L
Scott County ten-year laboratory totals, against Kentucky's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestKentucky, pooledChange from the row before
2008 to 201787546.9%3.6 pCi/L438.4 pCi/L43.7%−0.6 points
2007 to 201678747.5%3.7 pCi/L438.4 pCi/L45.1%−0.6 points
2006 to 201572748.1%3.8 pCi/L438.4 pCi/L46.4%−0.2 points
2005 to 201463548.3%3.8 pCi/L438.4 pCi/L47.3%First on file

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

Scott County, Geology

The ground under Scott County

Predicted

USGS's geologic map splits Scott County: 50.7% of its land is high radon potential and 49.3% moderate. The map puts 50.7% of Scott County in the area it calls Inner Bluegrass and 49.3% in Outer Bluegrass. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).

USGS's geologic areas under Scott County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Inner BluegrassOrdovician limestones, dolomites and shales.High1350.7%
Outer BluegrassOrdovician-Devonian limestone and shale.Moderate1149.3%

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

Scott County beside the ground around it

Scott County has more high-potential ground than Kentucky as a whole: 50.7% of its land against 18.2%. Of the 7 counties that border it, 3 have more high-potential ground, Woodford County the most at 100%.

Share of land by USGS radon potential: Scott County, the 7 counties bordering it and Kentucky
AreaEPA zoneLow potentialModerate potentialHigh potential
Scott CountyZone 1None49.3%50.7%
Harrison CountyZone 1None65.3%34.7%
Franklin CountyZone 1None33.2%66.8%
Owen CountyZone 2None98.1%1.9%
Fayette CountyZone 1None23.2%76.8%
Bourbon CountyZone 1None55.9%44.1%
Woodford CountyZone 1NoneNone100%
Grant 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

Scott County, Local resources

Radon testing and mitigation in Scott County

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

What it means

Scott County, Questions

Questions about radon in Scott County

Are radon levels high in Scott County?

Over the 2008 to 2017 laboratory totals, 46.9% of the radon tests reported to CDC for Scott County, Kentucky were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of 69 Kentucky counties with 30 or more tests for the same period, 20 reported a higher share; pooled, the state comes to 43.7%.

Which counties border Scott County?

Scott County borders 7 counties: Harrison County, Franklin County, Owen County, Fayette County, Bourbon County, Woodford County and Grant County.

Products

Scott County, Products

Testing a home in Scott County

In Scott County, 46.9% of 875 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 43.7% pooled across Kentucky. In Zone 1 the year-round level in Scott County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

Scott County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Scott County

Explore

Scott County, Bordering counties

Counties bordering Scott County

Calculated by Radon411

Scott County, Cities and towns

Cities and towns in Scott County

Scott County is growing: the Census Bureau puts it at 62,262 residents on July 1, 2025, up 8.2% from 57,541 in 2020. That works out to 221 people per square mile of land. Georgetown alone is home to 40,883 of them, 65.7% of the total. Testing is reported here more often than across the state: CDC's 875 reported tests for 2008 to 2017 come to 14.1 for every 1,000 residents (2025 estimate), against 6.3 for Kentucky.

From Georgetown to Corinth, CDC publishes no figure by town: each reads Scott County's.

The cities and towns in Scott County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Georgetown40,883+8.2%65.7%
Stamping Ground843+7.5%1.4%
Sadieville346+7.8%0.6%
Corinthextends beyond Scott County237+3.5%Counted whole

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

Scott County, Homes

Homes in Scott County

Scott County is a place of houses on their own lots: 76% of its 23,335 homes are detached single-family houses, against 68% across Kentucky. Much of Scott County is recent building: 46% of its homes have gone up since 2000 and the middle year built is 1998, against 1982 for Kentucky. 72% of occupied homes are lived in by their owner (Kentucky: 68%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Scott County, Kentucky, 2019 to 2023
HomesScott CountyKentucky
Housing units23,3352,010,655
Detached houses76%68%
In buildings of 5 or more11%12%
Mobile homes5%11%
Built before 196011%22%
Built since 200046%24%
Middle year built19981982
Owner-occupied72%68%

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