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 Jefferson Davis County, Mississippi
EPA puts Jefferson Davis 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, 74 miles
- Tangipahoa Parish
- 0.0%
Share at 4+ pCi/L, 43 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Jefferson Davis
- 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 Jefferson Davis 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
Jefferson Davis County, At a glance
Jefferson Davis 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 Jefferson Davis County. Tangipahoa Parish, LA, 74 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Jefferson Davis County, Compared
Jefferson Davis County radon figures, compared
Calculated by Radon411No Mississippi county, Jefferson Davis 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.
The nearest counties with a figure are Tangipahoa Parish, LA (74 miles away) at 0.0%, East Baton Rouge Parish, LA (104 miles away) at 0.0% and Mobile County, AL (110 miles away) at 4.4%.
EPA's 1993 map puts Jefferson Davis 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.
Jefferson Davis County, Geology
The ground under Jefferson Davis County
PredictedUSGS's geologic map puts all of Jefferson Davis County's mapped land in one class: low radon potential. All 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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Pine Hills | Sand, sandstone, bentonitic clay, quartzite, gravel, tuff, and siltstone. | Low | 6 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Jefferson Davis County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Jefferson Davis 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
Jefferson Davis County, Local resources
Radon testing and mitigation in Jefferson Davis 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
Jefferson Davis County, Questions
Questions about radon in Jefferson Davis County
Are radon levels high in Jefferson Davis County?
No CDC testing statistics are published here for Jefferson Davis County, Mississippi yet. Of the 8 nearest counties with a figure, within 198 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 12.8%.
Which counties border Jefferson Davis County?
Jefferson Davis County borders 5 counties: Lawrence County, Covington County, Simpson County, Marion County and Lamar County.
Products
Jefferson Davis County, Products
Testing a home in Jefferson Davis County
No CDC figure names Jefferson Davis County; the nearest county with one, Tangipahoa Parish, LA (74 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 Jefferson Davis 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and color screen
- 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
Best radon monitors for Jefferson Davis County homes, compared
Explore
Jefferson Davis County, Bordering counties
Counties bordering Jefferson Davis County
Calculated by Radon411counties bordering Jefferson Davis County: 1 of 5
Jefferson Davis County, Cities and towns
Cities and towns in Jefferson Davis County
About 10,941 people live in Jefferson Davis County by the Census Bureau's estimate for July 1, 2025, 333 fewer than in 2020 (−3.0%). That works out to 27 people per square mile of land. No town dominates: Prentiss, the largest, has 896 residents, 8.2% of the total. Together its 2 incorporated places hold 9.8% of those residents; the other 90.2% live outside any of them.
From Prentiss to Bassfield, CDC publishes no figure by town: each reads Jefferson Davis County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Prentiss | 896 | −7.2% | 8.2% |
| Bassfield | 180 | −5.8% | 1.6% |
2 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).
Jefferson Davis County, Homes
Homes in Jefferson Davis County
Of Jefferson Davis County's 5,665 homes, 69% are detached houses, against 69% across Mississippi; 28% are mobile homes. Half of its homes were built before 1984, close to Mississippi's 1986: 10% date from before 1960 and 26% from 2000 or later. Owners live in 82% of the occupied homes (Mississippi: 69%), so for most households a test and a fix are their own to order.
| Homes | Jefferson Davis County | Mississippi |
|---|---|---|
| Housing units | 5,665 | 1,332,811 |
| Detached houses | 69% | 69% |
| In buildings of 5 or more | 2% | 9% |
| Mobile homes | 28% | 15% |
| Built before 1960 | 10% | 15% |
| Built since 2000 | 26% | 28% |
| Middle year built | 1984 | 1986 |
| Owner-occupied | 82% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.