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Radon Levels in Pontotoc County, Mississippi

EPA puts Pontotoc County in Zone 2, its middle radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Nearest county

    18.6%

    Franklin County, 70 miles

    Franklin
    18.6%

    Share at 4+ pCi/L, 210 tests, 2006 to 2015

  • Ground above low

    43.1%

    34.9 pts above MS

    Pontotoc
    43.1%
    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 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

Read a result for Pontotoc 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

Pontotoc County, At a glance

Pontotoc County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Pontotoc 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: Low across 57% 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 Pontotoc County. Franklin County, AL, 70 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.

How to read these figures

Pontotoc County, Compared

Pontotoc County radon figures, compared

Calculated by Radon411

CDC publishes no radon test figure for Pontotoc 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 Franklin County, AL (70 miles away) at 18.6%, Fayette County, TN (70 miles away) at 13.1% and McNairy County, TN (71 miles away) at 8.2%.

EPA's 1993 map puts Pontotoc County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 57% of the county's land low radon potential.

The United States and the counties around Pontotoc 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 Pontotoc County with 30 or more tests, in any state, 2006 to 2015, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Franklin County, AL70 mi21018.6%1.4 pCi/L
Fayette County, TN70 mi8413.1%1.2 pCi/L
McNairy County, TN71 mi498.2%1.0 pCi/L
Colbert County, AL78 mi97836.6%2.7 pCi/L
Shelby County, TN82 mi3417.0%1.0 pCi/L
Chester County, TN86 mi390.0%0.9 pCi/L
Lauderdale County, AL92 mi2,02827.1%2.1 pCi/L
Madison County, TN96 mi885.7%1.1 pCi/L

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

Pontotoc County, Geology

The ground under Pontotoc County

Predicted

USGS's geologic map splits Pontotoc County: 56.9% of its land is low radon potential and 43.1% moderate. The map puts 56.9% of Pontotoc County in the area it calls North Central Hills/Flatwoods and 43.1% in Pontotoc Ridge/Black Prairies. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 9, in the moderate band (9 to 11).

USGS's geologic areas under Pontotoc County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
North Central Hills/FlatwoodsTertiary nonmarine to deltaic sediments ranging from sand to clay.Low856.9%
Pontotoc Ridge/Black PrairiesGlauconitic sand, clay, sandy limestone, micaceous chalk, and lime.Moderate943.1%

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

Pontotoc County beside the ground around it

Across Mississippi 0.1% of the land is rated high; none of Pontotoc County's is. Of the 5 counties that border it, 3 have more moderate-potential ground, Lee County the most at 97.6%.

Share of land by USGS radon potential: Pontotoc County, the 5 counties bordering it and Mississippi
AreaEPA zoneLow potentialModerate potentialHigh potential
Pontotoc CountyZone 256.9%43.1%None
Union CountyZone 246.6%53.4%None
Lee CountyZone 22.4%97.6%None
Chickasaw CountyZone 236.7%63.3%None
Lafayette CountyZone 3100%NoneNone
Calhoun 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

Pontotoc County, Questions

Questions about radon in Pontotoc County

Are radon levels high in Pontotoc County?

No CDC testing statistics are published here for Pontotoc County, Mississippi yet. Of the 8 nearest counties with a figure, within 96 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 36.6%.

Which counties border Pontotoc County?

Pontotoc County borders 5 counties: Union County, Lee County, Chickasaw County, Lafayette County and Calhoun County.

Products

Pontotoc County, Products

Testing a home in Pontotoc County

No CDC figure names Pontotoc County; the nearest county with one, Franklin County, AL (70 miles away), reported 18.6% 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Pontotoc County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Pontotoc County homes, compared

Explore

Pontotoc County, Bordering counties

Counties bordering Pontotoc County

Calculated by Radon411

Pontotoc County, Cities and towns

Cities and towns in Pontotoc County

The Census Bureau estimates 32,096 residents in Pontotoc County for July 1, 2025, 901 more than in 2020 (+2.9%). That works out to 64 people per square mile of land. No town dominates: Pontotoc, the largest, has 6,156 residents, 19.2% of the total.

From Pontotoc to Toccopola, CDC publishes no figure by town: each reads Pontotoc County's.

The cities and towns in Pontotoc County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Pontotoc6,156+9.1%19.2%
Ecru1,113+3.9%3.5%
Algoma723+2.1%2.3%
Thaxton692−0.4%2.2%
Shermanextends beyond Pontotoc County680+13.3%Counted whole
Toccopola289+3.2%0.9%

6 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 Pontotoc County is counted whole, so it has no share.

Pontotoc County, Homes

Homes in Pontotoc County

Of Pontotoc County's 14,076 homes, 68% are detached houses, against 69% across Mississippi; 27% are mobile homes. Half of its homes were built before 1986, close to Mississippi's 1986: 16% date from before 1960 and 29% from 2000 or later. 71% of occupied homes are lived in by their owner (Mississippi: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Pontotoc County, Mississippi, 2019 to 2023
HomesPontotoc CountyMississippi
Housing units14,0761,332,811
Detached houses68%69%
In buildings of 5 or more1%9%
Mobile homes27%15%
Built before 196016%15%
Built since 200029%28%
Middle year built19861986
Owner-occupied71%69%

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