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Radon Levels in Jackson County, Florida

EPA puts Jackson County in Zone 3, its lowest radon zone, and only 2 radon tests from it are on file with CDC (2023). 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

    1.4%

    20.7 pts below FL

    Jackson
    1.4%
    Florida
    22.1%

    74 tests, 2005 to 2014

  • Median result

    0.1pCi/L

    Below action level

    Jackson
    0.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2005 to 2014

  • Tests reported

    74

    27th of 37 by tests

    Jackson
    74
    Collier
    11,574

    Reported to CDC before any fix, 2005 to 2014

  • 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

  • Rank in Florida

    32 of 37

    Lowest quarter

    Jackson
    1.4%
    Marion
    37.9%

    By share, of 37 with 30+ tests

Read a result for Jackson County

Starts at Jackson County's median, 0.1 pCi/L

0.2pCi/L

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

EPA’s reading of 0.2 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. 0.1 pCi/L above Jackson County's median of 0.1 pCi/L.

Interpret this reading

The data

Jackson County, At a glance

Jackson County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Jackson 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 Jackson County, 2023

Share of reported tests at or above 4 pCi/L, by year, Jackson County
Share of reported tests at or above 4 pCi/L, by year, Jackson County
YearShare of reported tests at or above 4 pCi/L
20160.0%
2021100.0%
20230.0%

2023: 0.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 2 tests were reported to CDC for Jackson County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Jackson County, Compared

Jackson County radon figures, compared

Calculated by Radon411

Only 1 of 74 radon tests reported for Jackson County over the 2005 to 2014 laboratory totals reached 4 pCi/L (1.4%). The median result, 0.1 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 7.9 pCi/L.

The newest figure, in 2023, counts only 2 tests (0.0% at or above 4 pCi/L), too few to compare, so this reading uses the 74-test figure.

Across 62 Florida counties pooled together, 22.1% of tests reached that level, so Jackson County runs 20.7 points below its state. Against the national pool of 36.0%, the gap is 34.6 points lower. Its place in the state: 32nd of 37 Florida counties with 30 or more tests for the same period.

Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 1.4% share point the same way here. Gadsden County, the one bordering county with a figure for the same period, reported 3.0%.

Below the action level, 71 tests (95.9%) came in under 2 pCi/L, against 47.9% statewide, and 2 tests (2.7%) fell between 2 and 4, against 30.0% statewide. USGS geology rates 100% of the county's land low radon potential.

The busiest year on file was 2023, with 2 tests reported; the quietest, 2021, had 1.

Jackson County against Florida, the United States and nearby counties, 2005 to 2014, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Jackson County
Jackson County741.4%0.1 pCi/LThis county
Florida, pooled62 counties, pooled33,54222.1%Not pooled+20.7 points
United States, pooled2,655 counties, pooled1,669,35336.0%Not pooled+34.6 points
Marion Countyhighest in the state53837.9%3.0 pCi/L+36.5 points
St. Lucie Countylowest in the state370.0%0.1 pCi/L−1.4 points
Houston County, ALborders it540.0%1.7 pCi/L+38.6 points
Bay County, FLborders it185.6%0.8 pCi/L+4.2 points
Gadsden County, FLborders it1013.0%0.9 pCi/L+1.6 points
Decatur County, GAborders it50.0%1.6 pCi/L−1.4 points
Washington County, FLborders it20.0%0.9 pCi/L−1.4 points
Geneva County, ALborders it40.0%1.7 pCi/L−1.4 points
Holmes County, FLborders it50.0%0.1 pCi/L−1.4 points
Where Jackson County's reported results fell, 2005 to 2014, laboratory, beside Florida and the United States
ResultJackson County testsJackson County shareFlorida shareU.S. shareAgainst Florida
Under 2 pCi/L7195.9%47.9%39.8%+48.0 points
2 to 4 pCi/L22.7%30.0%24.2%−27.3 points
4 pCi/L and above11.4%22.1%36.0%−20.7 points
Jackson County ranked among the 37 Florida counties with 30 or more tests, by share at or above 4 pCi/L, 2005 to 2014, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Gadsden County27 of 371013.0%0.9 pCi/L
Brevard County28 of 377772.6%0.7 pCi/L
Duval County29 of 372252.2%0.7 pCi/L
Hernando County30 of 371691.8%0.8 pCi/L
Volusia County31 of 375311.5%0.6 pCi/L
Jackson County32 of 37741.4%0.1 pCi/L
Indian River County33 of 371581.3%0.6 pCi/L
Osceola County34 of 372471.2%0.7 pCi/L
Putnam County35 of 37680.0%0.1 pCi/L
Escambia County35 of 37430.0%0.6 pCi/L
St. Lucie County35 of 37370.0%0.1 pCi/L
Jackson County radon tests by year, against Florida's pooled share
YearTestsAt or above 4 pCi/LMedianHighestFlorida, pooledChange from the row before
202320.0%0.9 pCi/L1.0 pCi/L18.5%−100.0 points
20211100.0%14.5 pCi/L14.5 pCi/L15.4%+100.0 points
201610.0%1.3 pCi/L1.3 pCi/L24.3%First on file

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

Jackson County, Geology

The ground under Jackson County

Predicted

USGS's geologic map puts all of Jackson County's mapped land in one class: low radon potential. All of it lies in the area the map calls Northern Highland, to which USGS gives a radon index of 6, in the low band (5 to 8).

USGS's geologic areas under Jackson County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Northern HighlandSand, silt, clay, gravelLow699.9%

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

Jackson County beside the ground around it

Across Florida 7.1% of the land is rated moderate; none of Jackson County's is. None of the 10 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Jackson County, the 10 counties bordering it and Florida
AreaEPA zoneLow potentialModerate potentialHigh potential
Jackson CountyZone 3100%NoneNone
Seminole County, GAZone 3100%NoneNone
Houston County, ALZone 3100%NoneNone
Calhoun CountyZone 3100%NoneNone
Washington CountyZone 3100%NoneNone
Gadsden CountyZone 3100%NoneNone
Decatur County, GAZone 3100%NoneNone
Liberty CountyZone 3100%NoneNone
Holmes CountyZone 3100%NoneNone
Geneva County, ALZone 3100%NoneNone
Bay CountyZone 385.8%NoneNone
Florida67 counties, pooled by land areaVaries89.7%7.1%None

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

Local help

Jackson County, Local resources

Radon testing and mitigation in Jackson County

What Florida's program says
Phone
850-245-4288
Email
PHtoxicology@FLhealth.gov
Licensing of radon professionals
Florida Statutes require the certification of businesses and individuals providing radon services or any other radon related activity.

What it means

Jackson County, Questions

Questions about radon in Jackson County

Are radon levels high in Jackson County?

In 2023, 0.0% of the radon tests reported to CDC for Jackson County, Florida were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of 37 Florida counties with 30 or more tests for the same period, 31 reported a higher share; pooled, the state comes to 22.1%.

Which counties border Jackson County?

Jackson County borders 10 counties: Seminole County, GA, Houston County, AL, Calhoun County, FL, Washington County, FL, Gadsden County, FL, Decatur County, GA, Liberty County, FL, Holmes County, FL, Geneva County, AL and Bay County, FL.

Products

Jackson County, Products

Testing a home in Jackson County

In Jackson County, 1.4% of 74 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 22.1% pooled across Florida. 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 Jackson County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Jackson County homes, compared

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Jackson County, Bordering counties

Counties bordering Jackson County

Calculated by Radon411

Jackson County, Cities and towns

Cities and towns in Jackson County

Jackson County is growing: the Census Bureau puts it at 49,629 residents on July 1, 2025, up 5.4% from 47,104 in 2020. That works out to 54 people per square mile of land. No town dominates: Marianna, the largest, has 7,289 residents, 14.7% of the total. Together its 11 incorporated places hold 33.4% of those residents; the other 66.6% live outside any of them. CDC's 74 reported tests for 2005 to 2014 work out to 1.5 per 1,000 residents (2025 estimate), close to Florida's 1.4.

From Marianna to Bascom, CDC publishes no figure by town: each reads Jackson County's.

The cities and towns in Jackson County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Marianna7,289+15.8%14.7%
Graceville2,217+3.1%4.5%
Malone1,865+2.3%3.8%
Sneads1,784+4.7%3.6%
Grand Ridge925+3.6%1.9%
Cottondale879+3.7%1.8%
Greenwood560+3.1%1.1%
Alford521+5.0%1.0%
Jacob City230+5.5%0.5%
Campbellton200+4.2%0.4%
Bascom92+4.5%0.2%

11 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).

Jackson County, Homes

Homes in Jackson County

Of Jackson County's 20,061 homes, 66% are detached houses, against 55% across Florida; 28% are mobile homes. Half of its homes were built before 1982, close to Florida's 1988: 19% date from before 1960 and 20% from 2000 or later. 75% of occupied homes are lived in by their owner (Florida: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Jackson County, Florida, 2019 to 2023
HomesJackson CountyFlorida
Housing units20,06110,082,356
Detached houses66%55%
In buildings of 5 or more2%25%
Mobile homes28%8%
Built before 196019%10%
Built since 200020%30%
Middle year built19821988
Owner-occupied75%67%

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