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Radon Levels in Hall County, Georgia

EPA puts Hall County in Zone 2, its middle radon zone, and 39.8% of its 1,303 reported radon tests (2008 to 2017, laboratory totals) were at or above 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

    39.8%

    15.0 pts above GA

    Hall
    39.8%
    Georgia
    24.8%

    1,303 tests, 2008 to 2017

  • Median result

    3.2pCi/L

    Below action level

    Hall
    3.2 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    1,303

    6th of 57 by tests

    Hall
    1,303
    Fulton
    4,858

    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 Georgia

    11 of 57

    Top quarter

    Hall
    39.8%
    Barrow
    48.3%

    By share, of 57 with 30+ tests

Read a result for Hall County

Starts at Hall County's median, 3.2 pCi/L

3.2pCi/L

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

EPA’s reading of 3.2 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. Hall County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Hall County, At a glance

Hall County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Hall 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 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Hall County, 2008 to 2017, laboratory
Under 2 pCi/L: 27%2 to 4 pCi/L: 33%4 pCi/L and above: 40%

Of 1,303 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Hall County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L35427.2%
2 to 4 pCi/L43133.1%
4 pCi/L and above51839.8%
What these figures count

These are the 1,303 tests reported to CDC for Hall 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

Hall County, Compared

Hall County radon figures, compared

Calculated by Radon411

In Hall County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (518 of 1,303) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 4.1 points higher. Across 129 Georgia counties pooled together, 24.8% of tests reached that level, so Hall County runs 15.0 points above its state.

Of 9 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 6 a smaller one; the spread is 13.0% (Forsyth County) to 48.3% (Barrow County). By share, Hall County is 11th of 57 Georgia counties with 30 or more tests for the same period.

Half the tests came in under 3.2 pCi/L and half over it; the single highest reached 67.1 pCi/L. Below the action level, 354 tests (27.2%) came in under 2 pCi/L, against 44.0% statewide, and 431 tests (33.1%) fell between 2 and 4, against 31.2% statewide.

Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 39.8% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 113 tests taken after mitigation in Hall County for the same period: tests in homes where a fix was already in.

CDC's ten-year totals for Hall County went from 1,327 tests (2005 to 2014) to 1,303 (2008 to 2017), the share going from 35.9% to 39.8%.

Hall County against Georgia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Hall County
Hall County1,30339.8%3.2 pCi/LThis county
Georgia, pooled129 counties, pooled30,15224.8%Not pooled−15.0 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−4.1 points
Douglas Countyhighest in the state35547.3%3.7 pCi/L+7.5 points
Richmond Countylowest in the state320.0%1.4 pCi/L−39.8 points
Barrow County, GAborders it32148.3%3.8 pCi/L+8.5 points
Lumpkin County, GAborders it13646.3%3.6 pCi/L+6.5 points
Jackson County, GAborders it46040.0%3.2 pCi/L+0.2 points
Habersham County, GAborders it12837.5%3.1 pCi/L−2.3 points
Banks County, GAborders it5735.1%2.8 pCi/L−4.7 points
Gwinnett County, GAborders it4,18732.4%2.7 pCi/L−7.4 points
White County, GAborders it9125.3%2.7 pCi/L−14.5 points
Dawson County, GAborders it14221.8%2.1 pCi/L−18.0 points
Forsyth County, GAborders it1,38313.0%1.9 pCi/L−26.8 points
Where Hall County's reported results fell, 2008 to 2017, laboratory, beside Georgia and the United States
ResultHall County testsHall County shareGeorgia shareU.S. shareAgainst Georgia
Under 2 pCi/L35427.2%44.0%39.6%−16.8 points
2 to 4 pCi/L43133.1%31.2%24.7%+1.9 points
4 pCi/L and above51839.8%24.8%35.7%+15.0 points
Hall County ranked among the 57 Georgia counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Union County6 of 5727644.6%3.3 pCi/L
Walton County7 of 5783042.2%3.3 pCi/L
Carroll County8 of 5719040.5%3.4 pCi/L
Hart County9 of 5710740.2%3.4 pCi/L
Jackson County10 of 5746040.0%3.2 pCi/L
Hall County11 of 571,30339.8%3.2 pCi/L
Pickens County12 of 5713337.6%3.1 pCi/L
Habersham County13 of 5712837.5%3.1 pCi/L
Banks County14 of 575735.1%2.8 pCi/L
Troup County15 of 575633.9%2.9 pCi/L
Spalding County16 of 5710733.6%2.9 pCi/L
Hall County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 20171,30339.8%3.2 pCi/L67.1 pCi/L24.8%+1.1 points
2007 to 20161,33638.7%3.1 pCi/L67.1 pCi/L23.9%+1.4 points
2006 to 20151,35137.3%3.0 pCi/L67.1 pCi/L23.7%+1.4 points
2005 to 20141,32735.9%3.0 pCi/L67.1 pCi/L23.2%First on file

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

Hall County, Geology

The ground under Hall County

Predicted

USGS's geologic map puts all of Hall County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Georgiabama Thrust Stack (South), to which USGS gives a radon index of 9, in the moderate band (9 to 11).

USGS's geologic areas under Hall County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Georgiabama Thrust Stack (South)Schist, amphibolite and granite.Moderate9100%

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

Hall County beside the ground around it

Hall County has more moderate-potential ground than Georgia as a whole: 100% of its land against 26.5%. Of the 9 counties that border it, none has as large a share of moderate-potential ground; Banks County comes nearest at 100%.

Share of land by USGS radon potential: Hall County, the 9 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Hall CountyZone 2None100%None
Banks CountyZone 2None100%None
Jackson CountyZone 2None100%None
Barrow CountyZone 2None100%None
Forsyth CountyZone 2None100%None
Lumpkin CountyZone 2None100%None
White CountyZone 2None100%None
Gwinnett CountyZone 1None100%None
Habersham CountyZone 2None100%None
Dawson CountyZone 2None100%None
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

Local help

Hall County, Local resources

Radon testing and mitigation in Hall County

What Georgia's program says
Licensing of radon professionals
There are no laws mandating a mitigator receive certification in Georgia, however, many mitigators choose to get certified by one of two national programs.

What it means

Hall County, Questions

Questions about radon in Hall County

Are radon levels high in Hall County?

Over the 2008 to 2017 laboratory totals, 39.8% of the radon tests reported to CDC for Hall County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.2 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 10 reported a higher share; pooled, the state comes to 24.8%.

Which counties border Hall County?

Hall County borders 9 counties: Banks County, Jackson County, Barrow County, Forsyth County, Lumpkin County, White County, Gwinnett County, Habersham County and Dawson County.

Products

Hall County, Products

Testing a home in Hall County

In Hall County, 39.8% of 1,303 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.8% pooled across Georgia. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Hall County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Hall County homes, compared

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Hall County, Bordering counties

Counties bordering Hall County

Calculated by Radon411

Hall County, Cities and towns

Cities and towns in Hall County

Hall County is growing: the Census Bureau puts it at 226,568 residents on July 1, 2025, up 11.4% from 203,382 in 2020. That works out to 577 people per square mile of land. Its largest town, Gainesville, has 49,221 residents, 21.7% of the total. Testing is reported here more often than across the state: CDC's 1,303 reported tests for 2008 to 2017 come to 5.8 for every 1,000 residents (2025 estimate), against 2.7 for Georgia.

From Gainesville to Rest Haven, CDC publishes no figure by town: each reads Hall County's.

The cities and towns in Hall County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Gainesville49,221+16.8%21.7%
Bufordextends beyond Hall County18,780+9.6%Counted whole
Braseltonextends beyond Hall County18,496+35.9%Counted whole
Flowery Branch13,110+37.8%5.8%
Oakwood7,245+49.3%3.2%
Lulaextends beyond Hall County3,048+6.9%Counted whole
Clermont1,165+11.0%0.5%
Gillsvilleextends beyond Hall County418+8.3%Counted whole
Rest Havenextends beyond Hall County44+4.8%Counted whole

9 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 Hall County is counted whole, so it has no share.

Hall County, Homes

Homes in Hall County

Of Hall County's 79,233 homes, 73% are detached houses, against 66% across Georgia; 12% are in buildings of five or more homes. Half of its homes were built before 1995, close to Georgia's 1991: 9% date from before 1960 and 41% from 2000 or later. 69% of occupied homes are lived in by their owner (Georgia: 65%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Hall County, Georgia, 2019 to 2023
HomesHall CountyGeorgia
Housing units79,2334,483,873
Detached houses73%66%
In buildings of 5 or more12%16%
Mobile homes9%8%
Built before 19609%12%
Built since 200041%33%
Middle year built19951991
Owner-occupied69%65%

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