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Radon Levels in Twiggs County, Georgia

EPA puts Twiggs County in Zone 3, its lowest radon zone, and only 2 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Highest bordering

    26.5%

    Jones County

    Jones
    26.5%
    Bibb
    0.0%

    4 of 6 neighbours have 30+ tests, 2007 to 2016

  • Nearest county

    0.0%

    Bibb County, 18 miles

    Bibb
    0.0%
    Georgia
    23.9%

    Share at 4+ pCi/L, 96 tests, 2007 to 2016

  • Ground above low

    None

    26.5 pts below Georgia

    Twiggs
    0.0%
    Georgia
    26.5%

    Share of land USGS rates moderate or high potential

  • Tests reported

    3

    Too few for a share

    Twiggs
    3
    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 Twiggs 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

Twiggs County, At a glance

Twiggs County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Twiggs 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 Twiggs County, 2008 to 2017, laboratory

CDC holds 2 reported tests for Twiggs County over the 2008 to 2017 laboratory totals, with a median of 2.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Twiggs County beside the counties around it is how this page reads it.

What these figures count

Only 2 tests were reported to CDC for Twiggs County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Twiggs County, Compared

Twiggs County radon figures, compared

Calculated by Radon411

CDC's largest figure for Twiggs County rests on 3 tests over the 2007 to 2016 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 0.9 pCi/L, with a middle value of 0.6 pCi/L.

Of the counties bordering it, 4 have a figure over the 2007 to 2016 laboratory totals: Jones County reported the largest share at or above 4 pCi/L, 26.5%, and Bibb County the smallest, 0.0%, with Laurens County at 16.1% and Houston County at 8.2% between. Farther out, Monroe County (37 miles away) at 23.8%, Putnam County (45 miles away) at 27.3% and Morgan County (64 miles away) at 17.2% have figures too. Pooled across 137 Georgia counties, 23.9% of reported tests reached that level; across every county in the country with a figure, 35.8%.

Statewide for the same period, Barrow County reported the highest share (51.0%) and Dougherty County the lowest (0.0%). EPA's 1993 map puts Twiggs County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.

Georgia, the United States and the counties around Twiggs County, 2007 to 2016, laboratory
AreaTestsAt or above 4 pCi/LMedian
Georgia, pooled137 counties, pooled29,45523.9%Not pooled
United States, pooled2,666 counties, pooled1,939,02535.8%Not pooled
Barrow Countyhighest in the state34151.0%4.0 pCi/L
Dougherty Countylowest in the state320.0%0.6 pCi/L
Jones County, GAborders it3426.5%2.0 pCi/L
Laurens County, GAborders it3116.1%0.9 pCi/L
Houston County, GAborders it618.2%1.5 pCi/L
Bleckley County, GAborders it30.0%1.1 pCi/L
Bibb County, GAborders it960.0%1.0 pCi/L
Wilkinson County, GAborders it10.0%0.1 pCi/L
The nearest Georgia counties to Twiggs County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Bibb County18 mi960.0%1.0 pCi/L
Houston County20 mi618.2%1.5 pCi/L
Jones County26 mi3426.5%2.0 pCi/L
Laurens County33 mi3116.1%0.9 pCi/L
Monroe County37 mi23523.8%1.8 pCi/L
Putnam County45 mi3327.3%2.2 pCi/L
Morgan County64 mi5817.2%1.3 pCi/L
Spalding County64 mi9733.0%2.9 pCi/L
Twiggs County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 2017250.0%2.4 pCi/L4.6 pCi/L24.8%+50.0 points
2007 to 201630.0%0.6 pCi/L0.9 pCi/L23.9%Level
2006 to 201530.0%0.6 pCi/L0.9 pCi/L23.7%Level
2005 to 201420.0%0.8 pCi/L0.9 pCi/L23.2%First on file

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

Twiggs County, Geology

The ground under Twiggs County

Predicted

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

USGS's geologic areas under Twiggs County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Coastal PlainCretaceous and Tertiary marine and coastal sediments including limestone, sandstone, sand, silt, and clay. Coastal plan sands containing glauconite may generate locally elevated radon.Low8100%

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

Twiggs County beside the ground around it

Across Georgia 26.5% of the land is rated moderate; none of Twiggs County's is. None of the 6 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Twiggs County, the 6 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Twiggs CountyZone 3100%NoneNone
Bibb CountyZone 3100%NoneNone
Bleckley CountyZone 3100%NoneNone
Houston CountyZone 3100%NoneNone
Wilkinson CountyZone 3100%NoneNone
Jones CountyZone 3100%NoneNone
Laurens CountyZone 3100%NoneNone
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

What it means

Twiggs County, Questions

Questions about radon in Twiggs County

Are radon levels high in Twiggs County?

Over the 2008 to 2017 laboratory totals, 50.0% of the radon tests reported to CDC for Twiggs County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.4 pCi/L. Of the counties bordering it, 4 have a figure over the 2007 to 2016 laboratory totals: Jones County reported the largest share at or above 4 pCi/L, 26.5%, and Bibb County the smallest, 0.0%, with Laurens County at 16.1% and Houston County at 8.2% between.

Which counties border Twiggs County?

Twiggs County borders 6 counties: Bibb County, Bleckley County, Houston County, Wilkinson County, Jones County and Laurens County.

Products

Twiggs County, Products

Testing a home in Twiggs County

No CDC figure names Twiggs County; the nearest county with one, Bibb County (18 miles away), reported 0.0% of its tests at or above 4 pCi/L over the 2007 to 2016 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 Twiggs County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Twiggs County homes, compared

Explore

Twiggs County, Bordering counties

Counties bordering Twiggs County

Calculated by Radon411

Twiggs County, Cities and towns

Cities and towns in Twiggs County

Twiggs County has been losing residents: from 8,009 in 2020 to 7,597 on July 1, 2025, a fall of 5.1% by the Census Bureau's estimates. That works out to 21 people per square mile of land. No town dominates: Jeffersonville, the largest, has 907 residents, 11.9% of the total. Reported testing is thin here: 3 tests over 2007 to 2016, or 0.4 for every 1,000 residents (2025 estimate), where Georgia as a whole comes to 2.6.

From Jeffersonville to Danville, CDC publishes no figure by town: each reads Twiggs County's.

The cities and towns in Twiggs County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Jeffersonville907−6.0%11.9%
Allentownextends beyond Twiggs County192−2.5%Counted whole
Danvilleextends beyond Twiggs County161−6.9%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 Twiggs County is counted whole, so it has no share.

Twiggs County, Homes

Homes in Twiggs County

Of Twiggs County's 4,053 homes, 60% are detached houses, against 66% across Georgia; 37% are mobile homes. Half of its homes were built before 1985, close to Georgia's 1991: 15% date from before 1960 and 18% from 2000 or later. Owners live in 90% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.

Homes in Twiggs County, Georgia, 2019 to 2023
HomesTwiggs CountyGeorgia
Housing units4,0534,483,873
Detached houses60%66%
In buildings of 5 or more1%16%
Mobile homes37%8%
Built before 196015%12%
Built since 200018%33%
Middle year built19851991
Owner-occupied90%65%

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