Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Grenada County, Mississippi
EPA puts Grenada 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, 98 miles
- Shelby
- 7.0%
Share at 4+ pCi/L, 341 tests, 2006 to 2015
Ground above low
None
8.1 pts below MS
- Grenada
- 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 Grenada 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
Grenada County, At a glance
Grenada 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 Grenada County. Shelby County, TN, 98 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Grenada County, Compared
Grenada County radon figures, compared
Calculated by Radon411Grenada 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 (98 miles away) at 7.0%, Fayette County, TN (101 miles away) at 13.1% and Tipton County, TN (119 miles away) at 5.6%.
EPA's 1993 map puts Grenada 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.
Grenada County, Geology
The ground under Grenada County
PredictedUSGS's geologic map puts all of Grenada County's mapped land in one class: low radon potential. The map puts 81.5% of Grenada County in the area it calls North Central Hills/Flatwoods and 18.1% in Loess Hills. 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 | 81.5% |
| Loess Hills | Loess. | Low | 7 | 18.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Grenada County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Grenada County's is. None of the 7 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Grenada County, Local resources
Radon testing and mitigation in Grenada 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
Grenada County, Questions
Questions about radon in Grenada County
Are radon levels high in Grenada County?
No CDC testing statistics are published here for Grenada County, Mississippi yet. Of the 8 nearest counties with a figure, within 136 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 36.6%.
Which counties border Grenada County?
Grenada County borders 7 counties: Montgomery County, Yalobusha County, Carroll County, Tallahatchie County, Leflore County, Calhoun County and Webster County.
Products
Grenada County, Products
Testing a home in Grenada County
No CDC figure names Grenada County; the nearest county with one, Shelby County, TN (98 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 Grenada 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
MonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Grenada County, Bordering counties
Counties bordering Grenada County
Calculated by Radon411counties bordering Grenada County: 1 of 7
Grenada County, Cities and towns
Cities and towns in Grenada County
About 20,868 people live in Grenada County by the Census Bureau's estimate for July 1, 2025, 706 fewer than in 2020 (−3.3%). That works out to 49 people per square mile of land. Grenada, its one incorporated place, has 12,088 residents, 57.9% of the total.
Grenada is the one incorporated place here; CDC publishes no figure by town, so it reads Grenada County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Grenada | 12,088 | −4.5% | 57.9% |
One incorporated place, 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).
Grenada County, Homes
Homes in Grenada County
Of Grenada County's 10,418 homes, 70% are detached houses, against 69% across Mississippi; 14% are mobile homes. Half of its homes were built before 1980, close to Mississippi's 1986: 18% date from before 1960 and 20% from 2000 or later. 63% 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 | Grenada County | Mississippi |
|---|---|---|
| Housing units | 10,418 | 1,332,811 |
| Detached houses | 70% | 69% |
| In buildings of 5 or more | 7% | 9% |
| Mobile homes | 14% | 15% |
| Built before 1960 | 18% | 15% |
| Built since 2000 | 20% | 28% |
| Middle year built | 1980 | 1986 |
| Owner-occupied | 63% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.