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 DeSoto County, Mississippi
EPA puts DeSoto 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
Highest bordering
7.0%
Shelby County
- Shelby
- 7.0%
1 of 5 neighbours have 30+ tests, 2006 to 2015
Nearest county
7.0%
Shelby County, 22 miles
- Shelby
- 7.0%
Share at 4+ pCi/L, 341 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- DeSoto
- 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 DeSoto 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
DeSoto County, At a glance
DeSoto 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 DeSoto County. Shelby County, TN, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 7.0% of its tests at or above 4 pCi/L.
DeSoto County, Compared
DeSoto County radon figures, compared
Calculated by Radon411No Mississippi county, DeSoto County included, has a radon test figure from CDC; over the 2006 to 2015 laboratory totals, the agency's counts name 2,669 counties in other states. 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.
Shelby County, TN, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 7.0% of its tests at or above 4 pCi/L. Farther out, Fayette County, TN (40 miles away) at 13.1%, Tipton County, TN (45 miles away) at 5.6% and Madison County, TN (83 miles away) at 5.7% have figures too.
EPA's 1993 map puts DeSoto 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.
DeSoto County, Geology
The ground under DeSoto County
PredictedUSGS's geologic map puts all of DeSoto County's mapped land in one class: low radon potential. The map puts 88.6% of DeSoto County in the area it calls Loess Hills and 11.4% in Mississippi Alluvial Plain. USGS gives the first a radon index of 7 and the second 8, both in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Loess Hills | Loess. | Low | 7 | 88.6% |
| Mississippi Alluvial Plain | Alluvial sand, silt, gravel, and clay. | Low | 8 | 11.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
DeSoto County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of DeSoto 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
DeSoto County, Local resources
Radon testing and mitigation in DeSoto 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
DeSoto County, Questions
Questions about radon in DeSoto County
Are radon levels high in DeSoto County?
No CDC testing statistics are published here for DeSoto County, Mississippi yet. Shelby County, TN, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 7.0% of its tests at or above 4 pCi/L.
Which counties border DeSoto County?
DeSoto County borders 5 counties: Tate County, MS, Tunica County, MS, Marshall County, MS, Crittenden County, AR and Shelby County, TN.
Products
DeSoto County, Products
Testing a home in DeSoto County
No CDC figure names DeSoto County; the nearest county with one, Shelby County, TN (22 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 DeSoto 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
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
DeSoto County, Bordering counties
Counties bordering DeSoto County
Calculated by Radon411- Radon levels in Shelby County, TNEPA zone 3
7.0%at or above 4 pCi/L
Median 1.0 pCi/L · 341 tests
- Radon levels in Crittenden County, AREPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Tate County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Tunica County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Marshall County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
DeSoto County, Cities and towns
Cities and towns in DeSoto County
DeSoto County is growing: the Census Bureau puts it at 197,918 residents on July 1, 2025, up 6.3% from 186,120 in 2020. That works out to 415 people per square mile of land. Its largest town, Southaven, has 57,819 residents, 29.2% of the total. Together its 5 incorporated places hold 77.0% of those residents; the other 23.0% live outside any of them.
From Southaven to Walls, CDC publishes no figure by town: each reads DeSoto County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Southaven | 57,819 | +5.4% | 29.2% |
| Olive Branch | 47,563 | +2.1% | 24.0% |
| Horn Lake | 26,741 | Level | 13.5% |
| Hernando | 18,824 | +9.0% | 9.5% |
| Walls | 1,420 | +5.3% | 0.7% |
5 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).
DeSoto County, Homes
Homes in DeSoto County
DeSoto County is a place of houses on their own lots: 84% of its 74,066 homes are detached single-family houses, against 69% across Mississippi. Much of DeSoto County is recent building: 44% of its homes have gone up since 2000 and the middle year built is 1998, against 1986 for Mississippi. Owners live in 78% of the occupied homes (Mississippi: 69%), so for most households a test and a fix are their own to order.
| Homes | DeSoto County | Mississippi |
|---|---|---|
| Housing units | 74,066 | 1,332,811 |
| Detached houses | 84% | 69% |
| In buildings of 5 or more | 8% | 9% |
| Mobile homes | 4% | 15% |
| Built before 1960 | 4% | 15% |
| Built since 2000 | 44% | 28% |
| Middle year built | 1998 | 1986 |
| Owner-occupied | 78% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.