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Radon Levels in Monroe County, Georgia

EPA puts Monroe County in Zone 2, its middle radon zone, and 23.0% of its 248 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

    23.0%

    1.8 pts below GA

    Monroe
    23.0%
    Georgia
    24.8%

    248 tests, 2008 to 2017

  • Median result

    1.6pCi/L

    Below action level

    Monroe
    1.6 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    248

    21st of 57 by tests

    Monroe
    248
    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

    32 of 57

    Middle half

    Monroe
    23.0%
    Barrow
    48.3%

    By share, of 57 with 30+ tests

Read a result for Monroe County

Starts at Monroe County's median, 1.6 pCi/L

1.6pCi/L

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

EPA’s reading of 1.6 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. Monroe County's median reported result, 2008 to 2017.

Interpret this reading

The data

Monroe County, At a glance

Monroe County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Monroe 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 60% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

Reported results by concentration band, Monroe County, 2008 to 2017, laboratory
Under 2 pCi/L: 53%2 to 4 pCi/L: 24%4 pCi/L and above: 23%

Of 248 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Monroe County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L13253.2%
2 to 4 pCi/L5923.8%
4 pCi/L and above5723.0%
What these figures count

These are the 248 tests reported to CDC for Monroe 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

Monroe County, Compared

Monroe County radon figures, compared

Calculated by Radon411

Monroe County's 248 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 43.1 pCi/L, and 23.0% reached 4 pCi/L. Georgia as a whole (129 Georgia counties, pooled) comes to 24.8%: 1.8 points higher than here.

Among its state's counties it ranks 32nd of 57 Georgia counties with 30 or more tests for the same period. Statewide for the same period, Barrow County reported the highest share (48.3%) and Richmond County the lowest (0.0%).

Below the action level, 132 tests (53.2%) came in under 2 pCi/L, against 44.0% statewide, and 59 tests (23.8%) fell between 2 and 4, against 31.2% statewide. CDC's ten-year totals for Monroe County went from 224 tests (2005 to 2014) to 248 (2008 to 2017), the share going from 25.4% to 23.0%.

EPA's 1993 zone map puts Monroe County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 60% of the county's land moderate radon potential.

Next door, the shares run from 1.0% in Bibb County to 29.0% in Jones County, with Bibb County below Monroe County.

Monroe County against Georgia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Monroe County
Monroe County24823.0%1.6 pCi/LThis county
Georgia, pooled129 counties, pooled30,15224.8%Not pooled+1.8 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+12.7 points
Barrow Countyhighest in the state32148.3%3.8 pCi/L+25.3 points
Richmond Countylowest in the state320.0%1.4 pCi/L−23.0 points
Crawford County, GAborders it250.0%2.2 pCi/L+27.0 points
Lamar County, GAborders it1540.0%2.1 pCi/L+17.0 points
Jones County, GAborders it3129.0%2.2 pCi/L+6.0 points
Jasper County, GAborders it2227.3%2.3 pCi/L+4.3 points
Upson County, GAborders it1520.0%0.7 pCi/L−3.0 points
Butts County, GAborders it156.7%2.8 pCi/L−16.3 points
Bibb County, GAborders it991.0%0.9 pCi/L−22.0 points
Where Monroe County's reported results fell, 2008 to 2017, laboratory, beside Georgia and the United States
ResultMonroe County testsMonroe County shareGeorgia shareU.S. shareAgainst Georgia
Under 2 pCi/L13253.2%44.0%39.6%+9.2 points
2 to 4 pCi/L5923.8%31.2%24.7%−7.4 points
4 pCi/L and above5723.0%24.8%35.7%−1.8 points
Monroe 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
Paulding County27 of 5728926.0%2.3 pCi/L
Newton County28 of 5718625.8%2.1 pCi/L
Stephens County29 of 577925.3%2.2 pCi/L
White County30 of 579125.3%2.7 pCi/L
Bartow County31 of 5717724.9%2.2 pCi/L
Monroe County32 of 5724823.0%1.6 pCi/L
Walker County33 of 574422.7%1.6 pCi/L
Henry County34 of 5738422.7%2.1 pCi/L
Dawson County35 of 5714221.8%2.1 pCi/L
Fulton County36 of 574,85820.8%2.2 pCi/L
Whitfield County37 of 5710220.6%1.2 pCi/L
Monroe County ten-year laboratory totals, against Georgia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestGeorgia, pooledChange from the row before
2008 to 201724823.0%1.6 pCi/L43.1 pCi/L24.8%−0.8 points
2007 to 201623523.8%1.8 pCi/L43.1 pCi/L23.9%−2.0 points
2006 to 201523625.8%1.9 pCi/L43.1 pCi/L23.7%+0.4 points
2005 to 201422425.4%1.9 pCi/L43.1 pCi/L23.2%First on file

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

Monroe County, Geology

The ground under Monroe County

Predicted

USGS's geologic map splits Monroe County: 59.6% of its land is moderate radon potential and 40.4% low. The map puts 59.6% of Monroe County in the area it calls Georgiabama Thrust Stack (South) and 40.4% in Little River Thrust Stack. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 7, in the low band (5 to 8).

USGS's geologic areas under Monroe County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Georgiabama Thrust Stack (South)Schist, amphibolite and granite.Moderate959.6%
Little River Thrust StackBiotite and amphibolite gneiss, granite gneiss, mica schist.Low740.4%

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

Monroe County beside the ground around it

Monroe County has more moderate-potential ground than Georgia as a whole: 59.6% of its land against 26.5%. Of the 7 counties that border it, 3 have more moderate-potential ground, Lamar County the most at 100%.

Share of land by USGS radon potential: Monroe County, the 7 counties bordering it and Georgia
AreaEPA zoneLow potentialModerate potentialHigh potential
Monroe CountyZone 240.4%59.6%None
Lamar CountyZone 2None100%None
Bibb CountyZone 3100%NoneNone
Jones CountyZone 3100%NoneNone
Crawford CountyZone 399.9%0.1%None
Butts CountyZone 20.6%99.4%None
Upson CountyZone 215.9%84.1%None
Jasper CountyZone 246.1%53.9%None
Georgia159 counties, pooled by land areaVaries73.1%26.5%None

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

Local help

Monroe County, Local resources

Radon testing and mitigation in Monroe 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

Monroe County, Questions

Questions about radon in Monroe County

Are radon levels high in Monroe County?

Over the 2008 to 2017 laboratory totals, 23.0% of the radon tests reported to CDC for Monroe County, Georgia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.6 pCi/L. Of 57 Georgia counties with 30 or more tests for the same period, 31 reported a higher share; pooled, the state comes to 24.8%.

Which counties border Monroe County?

Monroe County borders 7 counties: Lamar County, Bibb County, Jones County, Crawford County, Butts County, Upson County and Jasper County.

Products

Monroe County, Products

Testing a home in Monroe County

In Monroe County, 23.0% of 248 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 Monroe County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Monroe County homes, compared

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Monroe County, Bordering counties

Counties bordering Monroe County

Calculated by Radon411

Monroe County, Cities and towns

Cities and towns in Monroe County

Monroe County is growing: the Census Bureau puts it at 32,023 residents on July 1, 2025, up 14.1% from 28,065 in 2020. That works out to 81 people per square mile of land. No town dominates: Forsyth, the largest, has 4,952 residents, 15.5% of the total. Together its 2 incorporated places hold 16.1% of those residents; the other 83.9% live outside any of them. Testing is reported here more often than across the state: CDC's 248 reported tests for 2008 to 2017 come to 7.7 for every 1,000 residents (2025 estimate), against 2.7 for Georgia.

From Forsyth to Culloden, CDC publishes no figure by town: each reads Monroe County's.

The cities and towns in Monroe County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Forsyth4,952+13.0%15.5%
Culloden209+16.1%0.7%

2 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).

Monroe County, Homes

Homes in Monroe County

Monroe County is a place of houses on their own lots: 78% of its 11,354 homes are detached single-family houses, against 66% across Georgia. Half of its homes were built before 1995, close to Georgia's 1991: 12% date from before 1960 and 40% from 2000 or later. Owners live in 83% of the occupied homes (Georgia: 65%), so for most households a test and a fix are their own to order.

Homes in Monroe County, Georgia, 2019 to 2023
HomesMonroe CountyGeorgia
Housing units11,3544,483,873
Detached houses78%66%
In buildings of 5 or more4%16%
Mobile homes17%8%
Built before 196012%12%
Built since 200040%33%
Middle year built19951991
Owner-occupied83%65%

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