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Radon Levels in Campbell County, Tennessee

EPA puts Campbell County in Zone 3, its lowest radon zone, and only 5 radon tests from it are on file with CDC (2023). 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

    53.5%

    20.2 pts above TN

    Campbell
    53.5%
    Tennessee
    33.3%

    71 tests, 2008 to 2017

  • Median result

    4.5pCi/L

    Action level reached

    Campbell
    4.5 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    71

    51st of 80 by tests

    Campbell
    71
    Davidson
    5,592

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Tennessee

    3 of 80

    Top quarter

    Campbell
    53.5%
    Jefferson
    56.8%

    By share, of 80 with 30+ tests

Read a result for Campbell County

Starts at Campbell County's median, 4.5 pCi/L

4.5pCi/L

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

EPA’s reading of 4.5 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. Campbell County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Campbell County, At a glance

Campbell County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Campbell County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 63% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Campbell County, 2023

Share of reported tests at or above 4 pCi/L, by year, Campbell County
Share of reported tests at or above 4 pCi/L, by year, Campbell County
YearShare of reported tests at or above 4 pCi/L
202216.7%
202340.0%

2023: 40.0%. Across these years the share ran from 16.7% to 40.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 5 tests were reported to CDC for Campbell County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Campbell County, Compared

Campbell County radon figures, compared

Calculated by Radon411

More than half: 53.5% of the 71 radon tests reported to CDC for Campbell County over the 2008 to 2017 laboratory totals read at least 4 pCi/L. That places it 3rd of 80 Tennessee counties with 30 or more tests for the same period. That is 20.2 points above the 33.3% pooled from 95 Tennessee counties.

The newest figure, in 2023, counts only 5 tests (40.0% at or above 4 pCi/L), too few to compare, so this reading uses the 71-test figure.

The median result, 4.5 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 47.1 pCi/L. The rest split 28.2% under 2 pCi/L and 18.3% from 2 to 4 (Tennessee: 42.4% and 24.3%). The reported tests do not follow EPA's Zone 3 label for Campbell County (predicted average under 2 pCi/L): 53.5% of them reached 4 pCi/L, more than a low-potential zone suggests.

No bordering county with a figure for the same period reported a higher share; the closest is Anderson County at 48.3%, the lowest Scott County at 2.6%. Statewide for the same period, Jefferson County reported the highest share (56.8%) and Chester County the lowest (0.0%).

The busiest year on file was 2022, with 36 tests reported; the quietest, 2023, had 5.

Nationally, every county with a figure for the same period pools to 35.7%; Campbell County sits 17.8 points above it. CDC also counts 10 tests taken after mitigation in Campbell County for the same period: tests in homes where a fix was already in.

Campbell County against Tennessee, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Campbell County
Campbell County7153.5%4.5 pCi/LThis county
Tennessee, pooled95 counties, pooled31,06633.3%Not pooled−20.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−17.8 points
Jefferson Countyhighest in the state14656.8%4.7 pCi/L+3.3 points
Chester Countylowest in the state440.0%1.1 pCi/L−53.5 points
Anderson County, TNborders it26948.3%3.8 pCi/L−5.2 points
Claiborne County, TNborders it12544.0%3.3 pCi/L−9.5 points
Union County, TNborders it5337.7%2.1 pCi/L−15.8 points
Whitley County, KYborders it234.3%1.6 pCi/L−49.2 points
Scott County, TNborders it392.6%1.3 pCi/L−50.9 points
McCreary County, KYborders it90.0%1.2 pCi/L−53.5 points
Where Campbell County's reported results fell, 2008 to 2017, laboratory, beside Tennessee and the United States
ResultCampbell County testsCampbell County shareTennessee shareU.S. shareAgainst Tennessee
Under 2 pCi/L2028.2%42.4%39.6%−14.2 points
2 to 4 pCi/L1318.3%24.3%24.7%−6.0 points
4 pCi/L and above3853.5%33.3%35.7%+20.2 points
Campbell County ranked among the 80 Tennessee counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Jefferson County1 of 8014656.8%4.7 pCi/L
Loudon County2 of 8085954.5%4.4 pCi/L
Campbell County3 of 807153.5%4.5 pCi/L
Sevier County4 of 8032853.0%4.4 pCi/L
Sullivan County5 of 801,79951.5%4.2 pCi/L
Washington County6 of 801,59049.6%3.9 pCi/L
White County7 of 8014749.0%3.9 pCi/L
Anderson County8 of 8026948.3%3.8 pCi/L
Grainger County9 of 805648.2%3.8 pCi/L
Carter County10 of 8034547.2%3.7 pCi/L
Jackson County11 of 804946.9%3.9 pCi/L
Campbell County radon tests by year, against Tennessee's pooled share
YearTestsAt or above 4 pCi/LMedianHighestTennessee, pooledChange from the row before
2023540.0%2.7 pCi/L7.2 pCi/L24.9%+23.3 points
20223616.7%0.8 pCi/L28.9 pCi/L23.8%First on file

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

Campbell County, Geology

The ground under Campbell County

Predicted

USGS's geologic map splits Campbell County: 63.1% of its land is low radon potential and 36.9% high. The map puts 63.1% of Campbell County in the area it calls Appalachian Plateau and 36.9% in Ridge and Valley. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 14, in the high band (12 to 17).

USGS's geologic areas under Campbell County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Appalachian PlateauSandstone and shale.Low863.1%
Ridge and ValleyPaleozoic sandstone and cherty dolostone.High1436.9%

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

Campbell County beside the ground around it

Tennessee as a whole has more high-potential ground than Campbell County: 47.2% of its land, against 36.9% here. Of the 6 counties that border it, 3 have more high-potential ground, Union County the most at 100%.

Share of land by USGS radon potential: Campbell County, the 6 counties bordering it and Tennessee
AreaEPA zoneLow potentialModerate potentialHigh potential
Campbell CountyZone 363.1%None36.9%
Union CountyZone 1NoneNone100%
Anderson CountyZone 131.4%None68.6%
Scott CountyZone 399.9%0.1%None
Whitley County, KYZone 20.6%99.4%None
Claiborne CountyZone 111.0%None89.0%
McCreary County, KYZone 212.7%87.3%None
Tennessee95 counties, pooled by land areaVaries30.5%22.3%47.2%

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

Local help

Campbell County, Local resources

Radon testing and mitigation in Campbell County

What Tennessee's program says
Phone
1-800-232-1139
Email
TDEC.Radon@tn.gov

What it means

Campbell County, Questions

Questions about radon in Campbell County

Are radon levels high in Campbell County?

In 2023, 40.0% of the radon tests reported to CDC for Campbell County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.7 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 2 reported a higher share; pooled, the state comes to 33.3%.

Which counties border Campbell County?

Campbell County borders 6 counties: Union County, TN, Anderson County, TN, Scott County, TN, Whitley County, KY, Claiborne County, TN and McCreary County, KY.

Products

Campbell County, Products

Testing a home in Campbell County

In Campbell County, 53.5% of 71 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Campbell County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Campbell County homes, compared

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Campbell County, Bordering counties

Counties bordering Campbell County

Calculated by Radon411

Campbell County, Cities and towns

Cities and towns in Campbell County

The Census Bureau estimates 40,290 residents in Campbell County for July 1, 2025, 980 more than in 2020 (+2.5%). That works out to 84 people per square mile of land. No town dominates: La Follette, the largest, has 7,176 residents, 17.8% of the total. Reported testing is thin here: 71 tests over 2008 to 2017, or 1.8 for every 1,000 residents (2025 estimate), where Tennessee as a whole comes to 4.2.

From La Follette to Rocky Top, CDC publishes no figure by town: each reads Campbell County's.

The cities and towns in Campbell County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
La Follette7,176−3.2%17.8%
Jacksboro2,235−2.7%5.5%
Caryville2,217+0.4%5.5%
Jellico2,126−1.1%5.3%
Rocky Topextends beyond Campbell County1,681+3.0%Counted whole

5 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 Campbell County is counted whole, so it has no share.

Campbell County, Homes

Homes in Campbell County

Of Campbell County's 20,370 homes, 72% are detached houses, against 68% across Tennessee; 14% are mobile homes. Half of its homes were built before 1984, close to Tennessee's 1986: 18% date from before 1960 and 23% from 2000 or later. 67% of occupied homes are lived in by their owner (Tennessee: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Campbell County, Tennessee, 2019 to 2023
HomesCampbell CountyTennessee
Housing units20,3703,095,472
Detached houses72%68%
In buildings of 5 or more7%14%
Mobile homes14%8%
Built before 196018%18%
Built since 200023%29%
Middle year built19841986
Owner-occupied67%67%

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