Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Lamar County, Mississippi
EPA puts Lamar 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, 67 miles
- Tangipahoa Parish
- 0.0%
Share at 4+ pCi/L, 43 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Lamar
- 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 Lamar 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
Lamar County, At a glance
Lamar 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 Lamar County. Tangipahoa Parish, LA, 67 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Lamar County, Compared
Lamar County radon figures, compared
Calculated by Radon411CDC publishes no radon test figure for Lamar 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 Tangipahoa Parish, LA (67 miles away) at 0.0%, Mobile County, AL (83 miles away) at 4.4% and Jefferson Parish, LA (104 miles away) at 1.5%.
EPA's 1993 map puts Lamar 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.
Lamar County, Geology
The ground under Lamar County
PredictedUSGS's geologic map puts all of Lamar 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.
Lamar County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Lamar 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
Lamar County, Local resources
Radon testing and mitigation in Lamar 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
Lamar County, Questions
Questions about radon in Lamar County
Are radon levels high in Lamar County?
No CDC testing statistics are published here for Lamar County, Mississippi yet. Of the 8 nearest counties with a figure, within 192 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 12.8%.
Which counties border Lamar County?
Lamar County borders 5 counties: Forrest County, Marion County, Pearl River County, Jefferson Davis County and Covington County.
Products
Lamar County, Products
Testing a home in Lamar County
No CDC figure names Lamar County; the nearest county with one, Tangipahoa Parish, LA (67 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 Lamar 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
MonitorAranet
Radon One battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lamar County, Bordering counties
Counties bordering Lamar County
Calculated by Radon411counties bordering Lamar County: 1 of 5
Lamar County, Cities and towns
Cities and towns in Lamar County
The Census Bureau estimates 67,403 residents in Lamar County for July 1, 2025, 3,012 more than in 2020 (+4.7%). That works out to 136 people per square mile of land. Hattiesburg, the largest place on its list (48,802 residents in all), extends beyond Lamar County, so no share of the total is worked out for it.
From Hattiesburg to Lumberton, CDC publishes no figure by town: each reads Lamar County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hattiesburgextends beyond Lamar County | 48,802 | +0.1% | Counted whole |
| Sumrall | 2,299 | +29.4% | 3.4% |
| Purvis | 1,969 | +3.5% | 2.9% |
| Lumbertonextends beyond Lamar County | 1,656 | +2.0% | Counted whole |
4 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 Lamar County is counted whole, so it has no share.
Lamar County, Homes
Homes in Lamar County
Of Lamar County's 27,523 homes, 66% are detached houses, against 69% across Mississippi; 14% are in buildings of five or more homes. Much of Lamar County is recent building: 47% of its homes have gone up since 2000 and the middle year built is 1999, against 1986 for Mississippi. 68% 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 | Lamar County | Mississippi |
|---|---|---|
| Housing units | 27,523 | 1,332,811 |
| Detached houses | 66% | 69% |
| In buildings of 5 or more | 14% | 9% |
| Mobile homes | 12% | 15% |
| Built before 1960 | 5% | 15% |
| Built since 2000 | 47% | 28% |
| Middle year built | 1999 | 1986 |
| Owner-occupied | 68% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.