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Radon Levels in Anson County, North Carolina

EPA puts Anson County in Zone 3, its lowest radon zone, and only 2 radon tests from it are on file with CDC (2020). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Highest bordering

    25.3%

    Stanly County

    Stanly
    25.3%
    Richmond
    0.0%

    4 of 6 neighbours have 30+ tests, 2008 to 2017

  • Nearest county

    0.0%

    Richmond County, 20 miles

    Richmond
    0.0%
    NC
    22.6%

    Share at 4+ pCi/L, 52 tests, 2008 to 2017

  • Ground above low

    31.1%

    3.1 pts below NC

    Anson
    31.1%
    NC
    34.2%

    Share of land USGS rates moderate or high potential

  • Tests reported

    19

    Too few for a share

    Anson
    19
    Needed
    30

    2007 to 2016, laboratory

  • 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

Read a result for Anson County

Starts at EPA's action level

4.0pCi/L

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

EPA’s reading of 4.0 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.

The data

Anson County, At a glance

Anson County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Anson 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 69% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Anson County, 2020

Share of reported tests at or above 4 pCi/L, by year, Anson County
Share of reported tests at or above 4 pCi/L, by year, Anson County
YearShare of reported tests at or above 4 pCi/L
201433.3%
20200.0%

2020: 0.0%. Across these years the share ran from 0.0% to 33.3%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 2 tests were reported to CDC for Anson County over 2020, 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: 2020. Measured data period: 2005 to 2020 (every CDC figure on file).

How to read these figures

Anson County, Compared

Anson County radon figures, compared

Calculated by Radon411

CDC's largest figure for Anson County rests on 19 tests over the 2007 to 2016 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 5.3 points and no rank or comparison is drawn from it. Results reached as high as 1.5 pCi/L, with a middle value of 0.6 pCi/L.

Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Stanly County reported the largest share at or above 4 pCi/L, 25.3%, and Richmond County the smallest, 0.0%, with Montgomery County at 20.4% and Union County at 11.2% between. Farther out, Scotland County (37 miles away) at 3.2%, Cabarrus County (38 miles away) at 8.8% and Moore County (42 miles away) at 19.2% have figures too. Pooled across 99 North Carolina counties, 22.6% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Transylvania County reported the highest share (47.8%) and Nash County the lowest (0.0%). EPA's 1993 map puts Anson County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 69% of the county's land low radon potential.

North Carolina, the United States and the counties around Anson County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
North Carolina, pooled99 counties, pooled73,13922.6%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Transylvania Countyhighest in the state3,86247.8%3.7 pCi/L
Nash Countylowest in the state300.0%0.2 pCi/L
Stanly County, NCborders it22925.3%2.2 pCi/L
Montgomery County, NCborders it10320.4%1.5 pCi/L
Union County, NCborders it83611.2%1.1 pCi/L
Chesterfield County, SCborders it100.0%0.6 pCi/L
Richmond County, NCborders it520.0%0.6 pCi/L
Marlboro County, SCborders it70.0%0.9 pCi/L
The nearest North Carolina counties to Anson County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Richmond County20 mi520.0%0.6 pCi/L
Union County24 mi83611.2%1.1 pCi/L
Stanly County25 mi22925.3%2.2 pCi/L
Montgomery County27 mi10320.4%1.5 pCi/L
Scotland County37 mi313.2%1.0 pCi/L
Cabarrus County38 mi8808.8%1.0 pCi/L
Moore County42 mi9919.2%1.3 pCi/L
Mecklenburg County45 mi3,7538.5%0.9 pCi/L
Anson County radon tests by year, against North Carolina's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNorth Carolina, pooledChange from the row before
202020.0%1.1 pCi/L2.0 pCi/L21.1%−33.3 points
2014333.3%0.6 pCi/L9.2 pCi/L21.9%First on file

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

Anson County, Geology

The ground under Anson County

Predicted

USGS's geologic map splits Anson County: 68.9% of its land is low radon potential and 31.1% moderate. The map puts 41.0% of Anson County in the area it calls Wadesboro Subbasin and 31.1% in Carolina Slate Belt, with 2 smaller areas beside them. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).

USGS's geologic areas under Anson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Wadesboro SubbasinArkosic sandstone, siltstone and conglomerate.Low841.0%
Carolina Slate BeltFelsic metavolcanics, intermediate volcanics, metamudstone, argillite, and epiclastic rocks.Moderate931.1%
Carolina Slate BeltFelsic metavolcanics, intermediate volcanics, metamudstone, argillite, and epiclastic rocks.Low622.8%
Upper and Middle Coastal PlainTertiary coastal plain sandy and silty sediments and marsh deposits.Low85.0%

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

Anson County beside the ground around it

Across North Carolina 1.3% of the land is rated high; none of Anson County's is. Of the 6 counties that border it, none has as large a share of moderate-potential ground; Richmond County comes nearest at 22.0%.

Share of land by USGS radon potential: Anson County, the 6 counties bordering it and North Carolina
AreaEPA zoneLow potentialModerate potentialHigh potential
Anson CountyZone 368.9%31.1%None
Richmond CountyZone 378.0%22.0%None
Stanly CountyZone 3100%NoneNone
Montgomery CountyZone 3100%NoneNone
Union CountyZone 3100%NoneNone
Chesterfield County, SCZone 393.0%7.0%None
Marlboro County, SCZone 3100%NoneNone
North Carolina100 counties, pooled by land areaVaries64.8%33.0%1.3%

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

What it means

Anson County, Questions

Questions about radon in Anson County

Are radon levels high in Anson County?

In 2020, 0.0% of the radon tests reported to CDC for Anson County, North Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of the counties bordering it, 4 have a figure over the 2008 to 2017 laboratory totals: Stanly County reported the largest share at or above 4 pCi/L, 25.3%, and Richmond County the smallest, 0.0%, with Montgomery County at 20.4% and Union County at 11.2% between.

Which counties border Anson County?

Anson County borders 6 counties: Richmond County, NC, Stanly County, NC, Montgomery County, NC, Union County, NC, Chesterfield County, SC and Marlboro County, SC.

Products

Anson County, Products

Testing a home in Anson County

No CDC figure names Anson County; the nearest county with one, Richmond County (20 miles away), reported 0.0% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. 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 Anson County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Anson County homes, compared

Explore

Anson County, Bordering counties

Counties bordering Anson County

Calculated by Radon411

Anson County, Cities and towns

Cities and towns in Anson County

About 21,758 people live in Anson County by the Census Bureau's estimate for July 1, 2025, 475 fewer than in 2020 (−2.1%). That works out to 41 people per square mile of land. Its largest town, Wadesboro, has 5,035 residents, 23.1% of the total. Together its 7 incorporated places hold 38.8% of those residents; the other 61.2% live outside any of them. Reported testing is thin here: 19 tests over 2007 to 2016, or 0.9 for every 1,000 residents (2025 estimate), where North Carolina as a whole comes to 6.3.

From Wadesboro to McFarlan, CDC publishes no figure by town: each reads Anson County's.

The cities and towns in Anson County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Wadesboro5,035+0.2%23.1%
Polkton1,722−29.4%7.9%
Ansonville461+2.7%2.1%
Lilesville398+2.1%1.8%
Peachland395+1.0%1.8%
Morven331+0.9%1.5%
McFarlan96+3.2%0.4%

7 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).

Anson County, Homes

Homes in Anson County

Of Anson County's 9,932 homes, 68% are detached houses, against 65% across North Carolina; 26% are mobile homes. The homes are older than North Carolina's as a whole: half were built before 1974 (1990 for North Carolina), and 26% date from before 1960. 66% 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 Anson County, North Carolina, 2019 to 2023
HomesAnson CountyNorth Carolina
Housing units9,9324,815,195
Detached houses68%65%
In buildings of 5 or more3%14%
Mobile homes26%11%
Built before 196026%14%
Built since 200011%33%
Middle year built19741990
Owner-occupied66%66%

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