Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Calhoun County, Mississippi
EPA puts Calhoun 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
13.1%
Fayette County, 87 miles
- Fayette
- 13.1%
Share at 4+ pCi/L, 84 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Calhoun
- 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
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Calhoun County
Starts at EPA's action level
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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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
Calhoun County, At a glance
Calhoun County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
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 Calhoun County. Fayette County, TN, 87 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Calhoun County, Compared
Calhoun County radon figures, compared
Calculated by Radon411Calhoun County is in a state CDC's county radon counts do not reach: no Mississippi county has a figure, while 2,669 counties elsewhere do over the 2006 to 2015 laboratory totals. 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 Fayette County, TN (87 miles away) at 13.1%, Shelby County, TN (92 miles away) at 7.0% and Franklin County, AL (92 miles away) at 18.6%.
EPA's 1993 map puts Calhoun 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.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Calhoun County, Geology
The ground under Calhoun County
PredictedUSGS's geologic map puts all of Calhoun County's mapped land in one class: low radon potential. All of it lies in the area the map calls North Central Hills/Flatwoods, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| North Central Hills/Flatwoods | Tertiary nonmarine to deltaic sediments ranging from sand to clay. | Low | 8 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Calhoun County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Calhoun County's is. Of the 6 counties that border it, 2 have more moderate-potential ground, Chickasaw County the most at 63.3%.
The map rates the ground, not the air in any home.
Local help
Calhoun County, Local resources
Radon testing and mitigation in Calhoun County
- Mississippi Radon ProgramMississippi Radon Program, run by Mississippi State Department of Health, answers questions about testing, mitigation and the rules in Mississippi.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Mississippi directoryNo professionals are listed in Mississippi yet. The state program can point you to registered testers and mitigators.
What Mississippi's program says
- Phone
- 1-800-626-7739
What it means
Calhoun County, Questions
Questions about radon in Calhoun County
Are radon levels high in Calhoun County?
No CDC testing statistics are published here for Calhoun County, Mississippi yet. Of the 8 nearest counties with a figure, within 114 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 36.6%.
Which counties border Calhoun County?
Calhoun County borders 6 counties: Chickasaw County, Yalobusha County, Lafayette County, Webster County, Pontotoc County and Grenada County.
Products
Calhoun County, Products
Testing a home in Calhoun County
No CDC figure names Calhoun County; the nearest county with one, Fayette County, TN (87 miles away), reported 13.1% 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 Calhoun County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Monitor
RM-65 rechargeable radon detector with a color screen and alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Calhoun County, Bordering counties
Counties bordering Calhoun County
Calculated by Radon411counties bordering Calhoun County: 1 of 6
Calhoun County, Cities and towns
Cities and towns in Calhoun County
About 12,643 people live in Calhoun County by the Census Bureau's estimate for July 1, 2025, 580 fewer than in 2020 (−4.4%). That works out to 22 people per square mile of land. No town dominates: Bruce, the largest, has 1,608 residents, 12.7% of the total. Together its 7 incorporated places hold 42.9% of those residents; the other 57.1% live outside any of them.
From Bruce to Slate Springs, CDC publishes no figure by town: each reads Calhoun County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Bruce | 1,608 | −5.5% | 12.7% |
| Calhoun City | 1,459 | −4.6% | 11.5% |
| Vardaman | 1,060 | −4.9% | 8.4% |
| Derma | 914 | −4.7% | 7.2% |
| Pittsboro | 155 | −3.7% | 1.2% |
| Big Creek | 124 | −5.3% | 1.0% |
| Slate Springs | 99 | −4.8% | 0.8% |
7 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).
Calhoun County, Homes
Homes in Calhoun County
Calhoun County is a place of houses on their own lots: 77% of its 6,744 homes are detached single-family houses, against 69% across Mississippi. Half of its homes were built before 1981, close to Mississippi's 1986: 17% date from before 1960 and 16% from 2000 or later. 73% 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 | Calhoun County | Mississippi |
|---|---|---|
| Housing units | 6,744 | 1,332,811 |
| Detached houses | 77% | 69% |
| In buildings of 5 or more | 2% | 9% |
| Mobile homes | 15% | 15% |
| Built before 1960 | 17% | 15% |
| Built since 2000 | 16% | 28% |
| Middle year built | 1981 | 1986 |
| Owner-occupied | 73% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.