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Radon Levels in Stanly County, North Carolina

EPA puts Stanly County in Zone 3, its lowest radon zone, and only 3 radon tests from it are on file with CDC (2022). 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

    25.3%

    2.7 pts above NC

    Stanly
    25.3%
    NC
    22.6%

    229 tests, 2008 to 2017

  • Median result

    2.2pCi/L

    Below action level

    Stanly
    2.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    229

    44th of 75 by tests

    Stanly
    229
    Wake
    9,694

    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 NC

    34 of 75

    Middle half

    Stanly
    25.3%
    Transylvania
    47.8%

    By share, of 75 with 30+ tests

Read a result for Stanly County

Starts at Stanly 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. Stanly County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Stanly County, At a glance

Stanly County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Stanly 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Stanly County, 2022

Share of reported tests at or above 4 pCi/L, by year, Stanly County
Share of reported tests at or above 4 pCi/L, by year, Stanly County
YearShare of reported tests at or above 4 pCi/L
201445.2%
202016.7%
20215.6%
20220.0%

2022: 0.0%. Across these years the share ran from 0.0% to 45.2%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 3 tests were reported to CDC for Stanly County over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).

How to read these figures

Stanly County, Compared

Stanly County radon figures, compared

Calculated by Radon411

Stanly County's 229 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.2 pCi/L and a maximum of 19.0 pCi/L, and 25.3% reached 4 pCi/L. North Carolina as a whole (99 North Carolina counties, pooled) comes to 22.6%: 2.7 points lower than here.

The newest figure, in 2022, counts only 3 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 229-test figure.

Among its state's counties it ranks 34th of 75 North Carolina counties with 30 or more tests for the same period. Statewide for the same period, Transylvania County reported the highest share (47.8%) and Nash County the lowest (0.0%).

Below the action level, 103 tests (45.0%) came in under 2 pCi/L, against 55.6% statewide, and 68 tests (29.7%) fell between 2 and 4, against 21.8% statewide. The busiest year on file was 2014, with 31 tests reported; the quietest, 2022, had 3.

EPA's 1993 zone map puts Stanly County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.

Next door, the shares run from 0.0% in Richmond County to 25.5% in Davidson County, with Montgomery County, Rowan County and Union County below Stanly County.

CDC also counts 13 tests taken after mitigation in Stanly County for the same period: tests in homes where a fix was already in.

Stanly County against North Carolina, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Stanly County
Stanly County22925.3%2.2 pCi/LThis county
North Carolina, pooled99 counties, pooled73,13922.6%Not pooled−2.7 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+10.4 points
Transylvania Countyhighest in the state3,86247.8%3.7 pCi/L+22.5 points
Nash Countylowest in the state300.0%0.2 pCi/L−25.3 points
Davidson County, NCborders it1,26525.5%1.8 pCi/L+0.2 points
Montgomery County, NCborders it10320.4%1.5 pCi/L−4.9 points
Rowan County, NCborders it62617.7%1.4 pCi/L−7.6 points
Union County, NCborders it83611.2%1.1 pCi/L−14.1 points
Cabarrus County, NCborders it8808.8%1.0 pCi/L−16.5 points
Richmond County, NCborders it520.0%0.6 pCi/L−25.3 points
Anson County, NCborders it180.0%0.6 pCi/L−25.3 points
Where Stanly County's reported results fell, 2008 to 2017, laboratory, beside North Carolina and the United States
ResultStanly County testsStanly County shareNorth Carolina shareU.S. shareAgainst North Carolina
Under 2 pCi/L10345.0%55.6%39.6%−10.6 points
2 to 4 pCi/L6829.7%21.8%24.7%+7.9 points
4 pCi/L and above5825.3%22.6%35.7%+2.7 points
Stanly County ranked among the 75 North Carolina counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Caldwell County29 of 7586127.6%2.5 pCi/L
Rockingham County30 of 7583527.3%2.1 pCi/L
Dare County31 of 754126.8%0.1 pCi/L
Rutherford County32 of 7551125.6%2.4 pCi/L
Davidson County33 of 751,26525.5%1.8 pCi/L
Stanly County34 of 7522925.3%2.2 pCi/L
Catawba County35 of 751,25924.8%2.0 pCi/L
Iredell County36 of 751,14621.8%1.8 pCi/L
Stokes County37 of 7559221.6%1.8 pCi/L
Montgomery County38 of 7510320.4%1.5 pCi/L
Moore County39 of 759919.2%1.3 pCi/L
Stanly County radon tests by year, against North Carolina's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNorth Carolina, pooledChange from the row before
202230.0%0.1 pCi/L1.0 pCi/L10.7%−5.6 points
2021185.6%0.1 pCi/L5.0 pCi/L14.9%−11.1 points
20202416.7%0.9 pCi/L7.5 pCi/L21.1%−28.5 points
20143145.2%3.0 pCi/L11.1 pCi/L21.9%First on file

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

Stanly County, Geology

The ground under Stanly County

Predicted

USGS's geologic map puts all of Stanly County's mapped land in one class: low radon potential. All of it lies in the area the map calls Carolina Slate Belt, to which USGS gives a radon index of 6, in the low band (5 to 8).

USGS's geologic areas under Stanly County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Carolina Slate BeltFelsic metavolcanics, intermediate volcanics, metamudstone, argillite, and epiclastic rocks.Low6100%

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

Stanly County beside the ground around it

Across North Carolina 1.3% of the land is rated high; none of Stanly County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Anson County the most at 31.1%.

Share of land by USGS radon potential: Stanly County, the 7 counties bordering it and North Carolina
AreaEPA zoneLow potentialModerate potentialHigh potential
Stanly CountyZone 3100%NoneNone
Cabarrus CountyZone 3100%NoneNone
Montgomery CountyZone 3100%NoneNone
Anson CountyZone 368.9%31.1%None
Davidson CountyZone 3100%NoneNone
Rowan CountyZone 3100%NoneNone
Union CountyZone 3100%NoneNone
Richmond CountyZone 378.0%22.0%None
North Carolina100 counties, pooled by land areaVaries64.8%33.0%1.3%

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

Local help

Stanly County, Local resources

Radon testing and mitigation in Stanly County

What North Carolina's program says
Licensing of radon professionals
The North Carolina Radon Program is presently developing a Radon Proficiency Program as directed by Session Law 2023-91 House Bill 782 .

What it means

Stanly County, Questions

Questions about radon in Stanly County

Are radon levels high in Stanly County?

In 2022, 0.0% of the radon tests reported to CDC for Stanly County, North Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of 75 North Carolina counties with 30 or more tests for the same period, 33 reported a higher share; pooled, the state comes to 22.6%.

Which counties border Stanly County?

Stanly County borders 7 counties: Cabarrus County, Montgomery County, Anson County, Davidson County, Rowan County, Union County and Richmond County.

Products

Stanly County, Products

Testing a home in Stanly County

In Stanly County, 25.3% of 229 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 22.6% pooled across North Carolina. 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 Stanly County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Stanly County homes, compared

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Stanly County, Bordering counties

Counties bordering Stanly County

Calculated by Radon411

Stanly County, Cities and towns

Cities and towns in Stanly County

Stanly County is growing: the Census Bureau puts it at 68,830 residents on July 1, 2025, up 9.8% from 62,666 in 2020. That works out to 174 people per square mile of land. Its largest town, Albemarle, has 17,769 residents, 25.8% of the total. Reported testing is thin here: 229 tests over 2008 to 2017, or 3.3 for every 1,000 residents (2025 estimate), where North Carolina as a whole comes to 6.5.

From Albemarle to Richfield, CDC publishes no figure by town: each reads Stanly County's.

The cities and towns in Stanly County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Albemarle17,769+8.2%25.8%
Locustextends beyond Stanly County6,120+26.0%Counted whole
Norwood2,568+8.6%3.7%
Oakboro2,316+9.1%3.4%
Badin1,915−5.1%2.8%
Stanfield1,744+9.6%2.5%
Red Cross845+10.5%1.2%
Misenheimer665−3.9%1.0%
New London664+9.2%1.0%
Richfield630+9.9%0.9%

10 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 Stanly County is counted whole, so it has no share.

Stanly County, Homes

Homes in Stanly County

Stanly County is a place of houses on their own lots: 80% of its 28,292 homes are detached single-family houses, against 65% across North Carolina. The homes are older than North Carolina's as a whole: half were built before 1975 (1990 for North Carolina), and 32% date from before 1960. 74% of occupied homes are lived in by their owner (North Carolina: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Stanly County, North Carolina, 2019 to 2023
HomesStanly CountyNorth Carolina
Housing units28,2924,815,195
Detached houses80%65%
In buildings of 5 or more3%14%
Mobile homes12%11%
Built before 196032%14%
Built since 200017%33%
Middle year built19751990
Owner-occupied74%66%

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