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Radon Levels in Lincoln County, Tennessee

EPA puts Lincoln County in Zone 1, its highest radon zone, and only 2 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

    20.8%

    12.5 pts below TN

    Lincoln
    20.8%
    Tennessee
    33.3%

    149 tests, 2008 to 2017

  • Median result

    1.9pCi/L

    Below action level

    Lincoln
    1.9 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    149

    33rd of 80 by tests

    Lincoln
    149
    Davidson
    5,592

    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 Tennessee

    56 of 80

    Middle half

    Lincoln
    20.8%
    Jefferson
    56.8%

    By share, of 80 with 30+ tests

Read a result for Lincoln County

Starts at Lincoln County's median, 1.9 pCi/L

1.9pCi/L

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

EPA’s reading of 1.9 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Lincoln County's median reported result, 2008 to 2017.

Interpret this reading

The data

Lincoln County, At a glance

Lincoln County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Lincoln 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 70% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Lincoln County, 2023

Share of reported tests at or above 4 pCi/L, by year, Lincoln County
Share of reported tests at or above 4 pCi/L, by year, Lincoln County
YearShare of reported tests at or above 4 pCi/L
202233.3%
202350.0%

2023: 50.0%. Across these years the share ran from 33.3% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 2 tests were reported to CDC for Lincoln 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

Lincoln County, Compared

Lincoln County radon figures, compared

Calculated by Radon411

Lincoln County's 149 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.9 pCi/L and a maximum of 19.3 pCi/L, and 20.8% reached 4 pCi/L. Tennessee as a whole (95 Tennessee counties, pooled) comes to 33.3%: 12.5 points higher than here.

The newest figure, in 2023, counts only 2 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 149-test figure.

Among its state's counties it ranks 56th of 80 Tennessee counties with 30 or more tests for the same period. Statewide for the same period, Jefferson County reported the highest share (56.8%) and Chester County the lowest (0.0%).

Below the action level, 75 tests (50.3%) came in under 2 pCi/L, against 42.4% statewide, and 43 tests (28.9%) fell between 2 and 4, against 24.3% statewide. The busiest year on file was 2022, with 9 tests reported; the quietest, 2023, had 2.

EPA's 1993 zone map puts Lincoln County in Zone 1, a predicted county average above 4 pCi/L. USGS geology rates 70% of the county's land high radon potential.

Next door, the shares run from 10.1% in Limestone County, AL to 40.7% in Giles County, with Marshall County and Limestone County, AL below Lincoln County.

Lincoln County against Tennessee, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Lincoln County
Lincoln County14920.8%1.9 pCi/LThis county
Tennessee, pooled95 counties, pooled31,06633.3%Not pooled+12.5 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+14.9 points
Jefferson Countyhighest in the state14656.8%4.7 pCi/L+36.0 points
Chester Countylowest in the state440.0%1.1 pCi/L−20.8 points
Giles County, TNborders it14040.7%3.3 pCi/L+19.9 points
Moore County, TNborders it5135.3%2.9 pCi/L+14.5 points
Franklin County, TNborders it26625.6%2.1 pCi/L+4.8 points
Madison County, ALborders it5,17825.2%1.9 pCi/L+4.4 points
Bedford County, TNborders it12421.0%1.8 pCi/L+0.2 points
Marshall County, TNborders it13818.1%1.6 pCi/L−2.7 points
Limestone County, ALborders it67410.1%1.3 pCi/L−10.7 points
Where Lincoln County's reported results fell, 2008 to 2017, laboratory, beside Tennessee and the United States
ResultLincoln County testsLincoln County shareTennessee shareU.S. shareAgainst Tennessee
Under 2 pCi/L7550.3%42.4%39.6%+7.9 points
2 to 4 pCi/L4328.9%24.3%24.7%+4.6 points
4 pCi/L and above3120.8%33.3%35.7%−12.5 points
Lincoln 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
Bledsoe County51 of 803724.3%2.1 pCi/L
Humphreys County52 of 8010523.8%2.0 pCi/L
Lawrence County53 of 8013621.3%1.6 pCi/L
Bedford County54 of 8012421.0%1.8 pCi/L
Bradley County55 of 8042520.9%1.9 pCi/L
Lincoln County56 of 8014920.8%1.9 pCi/L
Sequatchie County57 of 805820.7%1.9 pCi/L
Wilson County58 of 8095920.2%1.7 pCi/L
Macon County59 of 806719.4%1.9 pCi/L
Hamilton County60 of 801,14819.3%1.7 pCi/L
Marshall County61 of 8013818.1%1.6 pCi/L
Lincoln County radon tests by year, against Tennessee's pooled share
YearTestsAt or above 4 pCi/LMedianHighestTennessee, pooledChange from the row before
2023250.0%3.0 pCi/L4.5 pCi/L24.9%+16.7 points
2022933.3%1.4 pCi/L4.3 pCi/L23.8%First on file

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

Lincoln County, Geology

The ground under Lincoln County

Predicted

USGS's geologic map splits Lincoln County: 70.2% of its land is high radon potential and 29.8% moderate. The map puts 70.0% of Lincoln County in the area it calls Nashville Basin and 29.8% in Highland Rim. USGS gives the first a radon index of 14, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).

USGS's geologic areas under Lincoln County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Nashville BasinMississippian Limestone.High1470.0%
Highland RimPaleozoic sedimentary rocks (limestone, shale, chert, and dolostone).Moderate1129.8%

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

Lincoln County beside the ground around it

Lincoln County has more high-potential ground than Tennessee as a whole: 70.2% of its land against 47.2%. Of the 7 counties that border it, 6 have more high-potential ground, Marshall County the most at 100%.

Share of land by USGS radon potential: Lincoln County, the 7 counties bordering it and Tennessee
AreaEPA zoneLow potentialModerate potentialHigh potential
Lincoln CountyZone 1None29.8%70.2%
Moore CountyZone 1None29.0%71.0%
Marshall CountyZone 1NoneNone100%
Giles CountyZone 1None0.1%99.9%
Bedford CountyZone 1None2.2%97.8%
Franklin CountyZone 38.2%86.0%5.8%
Madison County, ALZone 1NoneNone100%
Limestone County, ALZone 1NoneNone100%
Tennessee95 counties, pooled by land areaVaries30.5%22.3%47.2%

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

Local help

Lincoln County, Local resources

Radon testing and mitigation in Lincoln County

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

What it means

Lincoln County, Questions

Questions about radon in Lincoln County

Are radon levels high in Lincoln County?

In 2023, 50.0% of the radon tests reported to CDC for Lincoln County, Tennessee were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.0 pCi/L. Of 80 Tennessee counties with 30 or more tests for the same period, 55 reported a higher share; pooled, the state comes to 33.3%.

Which counties border Lincoln County?

Lincoln County borders 7 counties: Moore County, TN, Marshall County, TN, Giles County, TN, Bedford County, TN, Franklin County, TN, Madison County, AL and Limestone County, AL.

Products

Lincoln County, Products

Testing a home in Lincoln County

In Lincoln County, 20.8% of 149 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 33.3% pooled across Tennessee. In Zone 1 the year-round level in Lincoln 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

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

Explore

Lincoln County, Bordering counties

Counties bordering Lincoln County

Calculated by Radon411

Lincoln County, Cities and towns

Cities and towns in Lincoln County

The Census Bureau estimates 36,853 residents in Lincoln County for July 1, 2025, 1,521 more than in 2020 (+4.3%). That works out to 65 people per square mile of land. No town dominates: Fayetteville, the largest, has 7,068 residents, 19.2% of the total. CDC's 149 reported tests for 2008 to 2017 work out to 4.0 per 1,000 residents (2025 estimate), close to Tennessee's 4.2.

From Fayetteville to Petersburg, CDC publishes no figure by town: each reads Lincoln County's.

The cities and towns in Lincoln County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Fayetteville7,068+0.1%19.2%
Ardmoreextends beyond Lincoln County1,244+2.8%Counted whole
Petersburgextends beyond Lincoln County562+6.8%Counted whole

3 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 Lincoln County is counted whole, so it has no share.

Lincoln County, Homes

Homes in Lincoln County

Lincoln County is a place of houses on their own lots: 79% of its 16,124 homes are detached single-family houses, against 68% across Tennessee. Half of its homes were built before 1986, close to Tennessee's 1986: 22% date from before 1960 and 29% from 2000 or later. Owners live in 77% of the occupied homes (Tennessee: 67%), so for most households a test and a fix are their own to order.

Homes in Lincoln County, Tennessee, 2019 to 2023
HomesLincoln CountyTennessee
Housing units16,1243,095,472
Detached houses79%68%
In buildings of 5 or more2%14%
Mobile homes13%8%
Built before 196022%18%
Built since 200029%29%
Middle year built19861986
Owner-occupied77%67%

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