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Radon Levels in Franklin County, Mississippi

EPA puts Franklin County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Nearest county

    0.0%

    Tangipahoa Parish, 65 miles

    Tangipahoa Parish
    0.0%

    Share at 4+ pCi/L, 43 tests, 2006 to 2015

  • Ground above low

    None

    8.1 pts below MS

    Franklin
    0.0%
    MS
    8.1%

    Share of land USGS rates moderate or high potential

  • Tests reported

    0

    None published

    A home here needs its own test

  • 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 Franklin 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

Franklin County, At a glance

Franklin County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Franklin 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

No CDC test figures here

CDC has published no radon test figures for Franklin County. Tangipahoa Parish, LA, 65 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.

How to read these figures

Franklin County, Compared

Franklin County radon figures, compared

Calculated by Radon411

CDC publishes no radon test figure for Franklin County, and none for any other Mississippi county: its counts over the 2006 to 2015 laboratory totals cover 2,669 counties elsewhere in the country. Across every county in the country with a figure (2,669), 36.3% of reported tests reached that level; no Mississippi county contributes to that pool.

The nearest counties with a figure are Tangipahoa Parish, LA (65 miles away) at 0.0%, East Baton Rouge Parish, LA (66 miles away) at 0.0% and Jefferson Parish, LA (125 miles away) at 1.5%.

EPA's 1993 map puts Franklin 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.

The United States and the counties around Franklin County, 2006 to 2015, laboratory
AreaTestsAt or above 4 pCi/LMedian
United States, pooled2,669 counties, pooled1,805,52836.3%Not pooled
The nearest counties to Franklin County with 30 or more tests, in any state, 2006 to 2015, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Tangipahoa Parish, LA65 mi430.0%0.1 pCi/L
East Baton Rouge Parish, LA66 mi480.0%0.6 pCi/L
Jefferson Parish, LA125 mi671.5%0.2 pCi/L
Mobile County, AL166 mi454.4%0.2 pCi/L
Calcasieu Parish, LA170 mi590.0%0.2 pCi/L
Escambia County, FL217 mi510.0%0.7 pCi/L
Tuscaloosa County, AL233 mi6910.1%1.1 pCi/L
Santa Rosa County, FL236 mi303.3%0.8 pCi/L

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

Franklin County, Geology

The ground under Franklin County

Predicted

USGS's geologic map puts all of Franklin County's mapped land in one class: low radon potential. 99.5% of it lies in the area the map calls Pine Hills, to which USGS gives a radon index of 6, in the low band (5 to 8).

USGS's geologic areas under Franklin County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Pine HillsSand, sandstone, bentonitic clay, quartzite, gravel, tuff, and siltstone.Low699.5%
Loess HillsLoess.Low70.5%

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

Franklin County beside the ground around it

Across Mississippi 0.1% of the land is rated high; none of Franklin County's is. None of the 5 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Franklin County, the 5 counties bordering it and Mississippi
AreaEPA zoneLow potentialModerate potentialHigh potential
Franklin CountyZone 3100%NoneNone
Jefferson CountyZone 3100%NoneNone
Amite CountyZone 3100%NoneNone
Adams CountyZone 3100%NoneNone
Lincoln CountyZone 3100%NoneNone
Wilkinson CountyZone 3100%NoneNone
Mississippi82 counties, pooled by land areaVaries91.8%8.0%0.1%

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

What it means

Franklin County, Questions

Questions about radon in Franklin County

Are radon levels high in Franklin County?

No CDC testing statistics are published here for Franklin County, Mississippi yet. Of the 8 nearest counties with a figure, within 236 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 10.1%.

Which counties border Franklin County?

Franklin County borders 5 counties: Jefferson County, Amite County, Adams County, Lincoln County and Wilkinson County.

Products

Franklin County, Products

Testing a home in Franklin County

No CDC figure names Franklin County; the nearest county with one, Tangipahoa Parish, LA (65 miles away), reported 0.0% of its tests at or above 4 pCi/L over the 2006 to 2015 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 Franklin County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Franklin County homes, compared

Explore

Franklin County, Bordering counties

Counties bordering Franklin County

Calculated by Radon411

Franklin County, Cities and towns

Cities and towns in Franklin County

About 7,491 people live in Franklin County by the Census Bureau's estimate for July 1, 2025, 170 fewer than in 2020 (−2.2%). That works out to 13 people per square mile of land. No town dominates: Bude, the largest, has 771 residents, 10.3% of the total. Together its 3 incorporated places hold 22.4% of those residents; the other 77.6% live outside any of them.

From Bude to Meadville, CDC publishes no figure by town: each reads Franklin County's.

The cities and towns in Franklin County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Bude771−2.5%10.3%
Roxie462−1.7%6.2%
Meadville448−3.7%6.0%

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).

Franklin County, Homes

Homes in Franklin County

Of Franklin County's 4,303 homes, 73% are detached houses, against 69% across Mississippi; 24% are mobile homes. Half of its homes were built before 1980, close to Mississippi's 1986: 22% date from before 1960 and 22% from 2000 or later. Owners live in 80% of the occupied homes (Mississippi: 69%), so for most households a test and a fix are their own to order.

Homes in Franklin County, Mississippi, 2019 to 2023
HomesFranklin CountyMississippi
Housing units4,3031,332,811
Detached houses73%69%
In buildings of 5 or more1%9%
Mobile homes24%15%
Built before 196022%15%
Built since 200022%28%
Middle year built19801986
Owner-occupied80%69%

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