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Radon Levels in Laurens County, South Carolina

EPA puts Laurens County in Zone 2, its middle radon zone, and most reported tests there come back low, though 13.9% of 244 (2008 to 2017, laboratory totals) reached 4 pCi/L. 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

    13.9%

    5.5 pts below SC

    Laurens
    13.9%
    SC
    19.4%

    244 tests, 2008 to 2017

  • Median result

    1.3pCi/L

    Below action level

    Laurens
    1.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    244

    12th of 24 by tests

    Laurens
    244
    Greenville
    12,004

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in SC

    7 of 24

    Middle half

    Laurens
    13.9%
    Oconee
    42.6%

    By share, of 24 with 30+ tests

Read a result for Laurens County

Starts at Laurens County's median, 1.3 pCi/L

1.3pCi/L

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

EPA’s reading of 1.3 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. Laurens County's median reported result, 2008 to 2017.

Interpret this reading

The data

Laurens County, At a glance

Laurens County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Laurens County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 58% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Laurens County, 2008 to 2017, laboratory
Under 2 pCi/L: 66%2 to 4 pCi/L: 20%4 pCi/L and above: 14%

Of 244 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Laurens County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L16266.4%
2 to 4 pCi/L4819.7%
4 pCi/L and above3413.9%
What these figures count

These are the 244 tests reported to CDC for Laurens 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

Laurens County, Compared

Laurens County radon figures, compared

Calculated by Radon411

Laurens County reports fewer high tests than South Carolina overall. 13.9% of its 244 tests over the 2008 to 2017 laboratory totals were at or above 4 pCi/L. That is 5.5 points below the 19.4% pooled from 46 South Carolina counties.

Ordered from highest share down, it comes 7th of 24 South Carolina counties with 30 or more tests for the same period. Nationally, every county with a figure for the same period pools to 35.7%; Laurens County sits 21.8 points below it.

Next door, the shares run from 7.1% in Greenwood County to 22.7% in Abbeville County, with Anderson County and Greenwood County below Laurens County. Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 13.9% share point the same way here.

Half the tests came in under 1.3 pCi/L and half over it; the single highest reached 27.5 pCi/L. The rest split 66.4% under 2 pCi/L and 19.7% from 2 to 4 (South Carolina: 57.4% and 23.1%).

CDC's ten-year totals for Laurens County went from 235 tests (2005 to 2014) to 244 (2008 to 2017), the share going from 14.0% to 13.9%.

Laurens County against South Carolina, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Laurens County
Laurens County24413.9%1.3 pCi/LThis county
South Carolina, pooled46 counties, pooled26,48119.4%Not pooled+5.5 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+21.8 points
Oconee Countyhighest in the state2,46942.6%3.3 pCi/L+28.7 points
Florence Countylowest in the state590.0%0.7 pCi/L−13.9 points
Abbeville County, SCborders it6622.7%1.8 pCi/L+8.8 points
Greenville County, SCborders it12,00419.6%1.7 pCi/L+5.7 points
Spartanburg County, SCborders it3,28019.1%1.7 pCi/L+5.2 points
Newberry County, SCborders it7516.0%1.1 pCi/L+2.1 points
Anderson County, SCborders it1,73311.1%1.1 pCi/L−2.8 points
Greenwood County, SCborders it1137.1%1.0 pCi/L−6.8 points
Union County, SCborders it270.0%1.0 pCi/L−13.9 points
Where Laurens County's reported results fell, 2008 to 2017, laboratory, beside South Carolina and the United States
ResultLaurens County testsLaurens County shareSouth Carolina shareU.S. shareAgainst South Carolina
Under 2 pCi/L16266.4%57.4%39.6%+9.0 points
2 to 4 pCi/L4819.7%23.1%24.7%−3.4 points
4 pCi/L and above3413.9%19.4%35.7%−5.5 points
Laurens County ranked among the 24 South 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
Pickens County2 of 241,71723.6%1.8 pCi/L
Abbeville County3 of 246622.7%1.8 pCi/L
Greenville County4 of 2412,00419.6%1.7 pCi/L
Spartanburg County5 of 243,28019.1%1.7 pCi/L
Newberry County6 of 247516.0%1.1 pCi/L
Laurens County7 of 2424413.9%1.3 pCi/L
Cherokee County8 of 2415313.7%1.6 pCi/L
Lancaster County9 of 2437413.6%1.6 pCi/L
York County10 of 241,41213.6%1.2 pCi/L
Aiken County11 of 2424113.3%1.3 pCi/L
Lexington County12 of 2459112.5%0.9 pCi/L
Laurens County ten-year laboratory totals, against South Carolina's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestSouth Carolina, pooledChange from the row before
2008 to 201724413.9%1.3 pCi/L27.5 pCi/L19.4%−0.3 points
2007 to 201624614.2%1.3 pCi/L27.5 pCi/L19.3%+0.2 points
2006 to 201523614.0%1.3 pCi/L21.9 pCi/L19.8%Level
2005 to 201423514.0%1.3 pCi/L21.9 pCi/L19.8%First on file

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

Laurens County, Geology

The ground under Laurens County

Predicted

USGS's geologic map splits Laurens County: 57.6% of its land is moderate radon potential and 42.4% low. The map puts 52.7% of Laurens County in the area it calls Inner Piedmont Belt and 42.4% in Charlotte Belt, with 2 smaller areas beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 8, in the low band (5 to 8).

USGS's geologic areas under Laurens County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Inner Piedmont BeltProterozoic through Cambrian biotite gneiss and schist, and mica schist.Moderate1152.7%
Charlotte BeltBiotite gneiss and schist, metavolcanic rocks, mica gneiss.Low842.4%
Carolina and Charlotte Belt GranitesGranite and granite gneissModerate113.8%
Kings Mountain BeltProterozoic-Cambrain metasedimentary and metavolcanic rocks.Moderate111.1%

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

Laurens County beside the ground around it

Across South Carolina 0.2% of the land is rated high; none of Laurens County's is. Of the 7 counties that border it, 3 have more moderate-potential ground, Anderson County the most at 100%.

Share of land by USGS radon potential: Laurens County, the 7 counties bordering it and South Carolina
AreaEPA zoneLow potentialModerate potentialHigh potential
Laurens CountyZone 242.4%57.6%None
Union CountyZone 346.4%53.6%None
Greenwood CountyZone 388.7%11.3%None
Newberry CountyZone 381.0%19.0%None
Spartanburg CountyZone 2None100%None
Greenville CountyZone 1None100%None
Abbeville CountyZone 249.6%50.4%None
Anderson CountyZone 2None100%None
South Carolina46 counties, pooled by land areaVaries80.8%18.2%0.2%

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

Local help

Laurens County, Local resources

Radon testing and mitigation in Laurens County

What South Carolina's program says
Phone
1-800-768-0362
Email
radon@des.sc.gov

What it means

Laurens County, Questions

Questions about radon in Laurens County

Are radon levels high in Laurens County?

Over the 2008 to 2017 laboratory totals, 13.9% of the radon tests reported to CDC for Laurens County, South Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.3 pCi/L. Of 24 South Carolina counties with 30 or more tests for the same period, 6 reported a higher share; pooled, the state comes to 19.4%.

Which counties border Laurens County?

Laurens County borders 7 counties: Union County, Greenwood County, Newberry County, Spartanburg County, Greenville County, Abbeville County and Anderson County.

Products

Laurens County, Products

Testing a home in Laurens County

In Laurens County, 13.9% of 244 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 19.4% pooled across South Carolina. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Laurens County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Laurens County homes, compared

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Laurens County, Bordering counties

Counties bordering Laurens County

Calculated by Radon411

Laurens County, Cities and towns

Cities and towns in Laurens County

Laurens County is growing: the Census Bureau puts it at 71,848 residents on July 1, 2025, up 6.2% from 67,626 in 2020. That works out to 101 people per square mile of land. Fountain Inn, the largest place on its list (14,722 residents in all), extends beyond Laurens County, so no share of the total is worked out for it. CDC's 244 reported tests for 2008 to 2017 work out to 3.4 per 1,000 residents (2025 estimate), close to South Carolina's 4.8.

From Fountain Inn to Waterloo, CDC publishes no figure by town: each reads Laurens County's.

The cities and towns in Laurens County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Fountain Innextends beyond Laurens County14,722+40.1%Counted whole
Laurens9,327−0.2%13.0%
Clinton7,918+3.8%11.0%
Ware Shoalsextends beyond Laurens County1,733+1.8%Counted whole
Gray Court813+5.0%1.1%
Cross Hill440+8.1%0.6%
Waterloo159+6.7%0.2%

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

Laurens County, Homes

Homes in Laurens County

Of Laurens County's 31,695 homes, 62% are detached houses, against 64% across South Carolina; 30% are mobile homes. Half of its homes were built before 1984, close to South Carolina's 1991: 16% date from before 1960 and 21% from 2000 or later. 71% of occupied homes are lived in by their owner (South Carolina: 71%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Laurens County, South Carolina, 2019 to 2023
HomesLaurens CountySouth Carolina
Housing units31,6952,401,638
Detached houses62%64%
In buildings of 5 or more4%13%
Mobile homes30%15%
Built before 196016%13%
Built since 200021%35%
Middle year built19841991
Owner-occupied71%71%

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