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 Forrest County, Mississippi
EPA puts Forrest 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
4.4%
Mobile County, 68 miles
- Mobile
- 4.4%
Share at 4+ pCi/L, 45 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Forrest
- 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 Forrest 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
Forrest County, At a glance
Forrest 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 Forrest County. Mobile County, AL, 68 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Forrest County, Compared
Forrest County radon figures, compared
Calculated by Radon411Forrest 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 Mobile County, AL (68 miles away) at 4.4%, Tangipahoa Parish, LA (78 miles away) at 0.0% and Jefferson Parish, LA (110 miles away) at 1.5%.
EPA's 1993 map puts Forrest 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.
Forrest County, Geology
The ground under Forrest County
PredictedUSGS's geologic map puts all of Forrest 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.
Forrest County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Forrest County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Forrest County, Local resources
Radon testing and mitigation in Forrest 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
Forrest County, Questions
Questions about radon in Forrest County
Are radon levels high in Forrest County?
No CDC testing statistics are published here for Forrest County, Mississippi yet. Of the 8 nearest counties with a figure, within 180 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 12.8%.
Which counties border Forrest County?
Forrest County borders 6 counties: Lamar County, Perry County, Stone County, Jones County, Pearl River County and Covington County.
Products
Forrest County, Products
Testing a home in Forrest County
No CDC figure names Forrest County; the nearest county with one, Mobile County, AL (68 miles away), reported 4.4% 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 Forrest 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
Forrest County, Bordering counties
Counties bordering Forrest County
Calculated by Radon411counties bordering Forrest County: 1 of 6
Forrest County, Cities and towns
Cities and towns in Forrest County
The Census Bureau estimates 79,034 residents in Forrest County for July 1, 2025, 836 more than in 2020 (+1.1%). That works out to 170 people per square mile of land. Hattiesburg, the largest place on its list (48,802 residents in all), extends beyond Forrest County, so no share of the total is worked out for it.
From Hattiesburg to Petal, CDC publishes no figure by town: each reads Forrest County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hattiesburgextends beyond Forrest County | 48,802 | +0.1% | Counted whole |
| Petal | 11,694 | +5.7% | 14.8% |
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). A place that extends beyond Forrest County is counted whole, so it has no share.
Forrest County, Homes
Homes in Forrest County
Of Forrest County's 33,672 homes, 64% are detached houses, against 69% across Mississippi; 17% are in buildings of five or more homes. Half of its homes were built before 1981, close to Mississippi's 1986: 21% date from before 1960 and 25% from 2000 or later. 57% 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 | Forrest County | Mississippi |
|---|---|---|
| Housing units | 33,672 | 1,332,811 |
| Detached houses | 64% | 69% |
| In buildings of 5 or more | 17% | 9% |
| Mobile homes | 10% | 15% |
| Built before 1960 | 21% | 15% |
| Built since 2000 | 25% | 28% |
| Middle year built | 1981 | 1986 |
| Owner-occupied | 57% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.