Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Carroll County, Mississippi
EPA puts Carroll 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
7.0%
Shelby County, 120 miles
- Shelby
- 7.0%
Share at 4+ pCi/L, 341 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Carroll
- 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 Carroll 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
Carroll County, At a glance
Carroll 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 Carroll County. Shelby County, TN, 120 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Carroll County, Compared
Carroll County radon figures, compared
Calculated by Radon411Carroll 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 Shelby County, TN (120 miles away) at 7.0%, Fayette County, TN (124 miles away) at 13.1% and Franklin County, AL (138 miles away) at 18.6%.
EPA's 1993 map puts Carroll 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.
Carroll County, Geology
The ground under Carroll County
PredictedUSGS's geologic map puts all of Carroll County's mapped land in one class: low radon potential. The map puts 64.9% of Carroll County in the area it calls North Central Hills/Flatwoods and 32.5% in Loess Hills, with one smaller area beside them. USGS gives the first a radon index of 8 and the second 7, both 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 | 64.9% |
| Loess Hills | Loess. | Low | 7 | 32.5% |
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 2.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Carroll County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Carroll County's is. None of the 5 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Carroll County, Local resources
Radon testing and mitigation in Carroll 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
Carroll County, Questions
Questions about radon in Carroll County
Are radon levels high in Carroll County?
No CDC testing statistics are published here for Carroll County, Mississippi yet. Of the 8 nearest counties with a figure, within 155 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 36.6%.
Which counties border Carroll County?
Carroll County borders 5 counties: Leflore County, Montgomery County, Holmes County, Grenada County and Attala County.
Products
Carroll County, Products
Testing a home in Carroll County
No CDC figure names Carroll County; the nearest county with one, Shelby County, TN (120 miles away), reported 7.0% 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 Carroll County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Carroll County, Bordering counties
Counties bordering Carroll County
Calculated by Radon411counties bordering Carroll County: 1 of 5
Carroll County, Cities and towns
Cities and towns in Carroll County
Carroll County has been losing residents: from 9,937 in 2020 to 9,226 on July 1, 2025, a fall of 7.2% by the Census Bureau's estimates. That works out to 15 people per square mile of land. No town dominates: Vaiden, the largest, has 872 residents, 9.5% of the total. Together its 3 incorporated places hold 17.8% of those residents; the other 82.2% live outside any of them.
From Vaiden to North Carrollton, CDC publishes no figure by town: each reads Carroll County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Vaiden | 872 | −3.0% | 9.5% |
| Carrollton | 406 | −6.7% | 4.4% |
| North Carrollton | 366 | −8.7% | 4.0% |
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).
Carroll County, Homes
Homes in Carroll County
Of Carroll County's 4,950 homes, 65% are detached houses, against 69% across Mississippi; 29% are mobile homes. Half of its homes were built before 1987, close to Mississippi's 1986: 16% date from before 1960 and 28% 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 | Carroll County | Mississippi |
|---|---|---|
| Housing units | 4,950 | 1,332,811 |
| Detached houses | 65% | 69% |
| In buildings of 5 or more | 3% | 9% |
| Mobile homes | 29% | 15% |
| Built before 1960 | 16% | 15% |
| Built since 2000 | 28% | 28% |
| Middle year built | 1987 | 1986 |
| Owner-occupied | 80% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.