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 Alcorn County, Mississippi
EPA puts Alcorn County in Zone 2, its middle radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
8.2%
McNairy County
- McNairy
- 8.2%
1 of 6 neighbours have 30+ tests, 2006 to 2015
Nearest county
8.2%
McNairy County, 20 miles
- McNairy
- 8.2%
Share at 4+ pCi/L, 49 tests, 2006 to 2015
Ground above low
99.8%
91.7 pts above MS
- Alcorn
- 99.8%
- 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 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Alcorn 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
Alcorn County, At a glance
Alcorn County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Alcorn County is a
USGS geologic potential: Moderate 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 Alcorn County. McNairy County, TN, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 8.2% of its tests at or above 4 pCi/L.
Alcorn County, Compared
Alcorn County radon figures, compared
Calculated by Radon411No Mississippi county, Alcorn 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.
McNairy County, TN, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 8.2% of its tests at or above 4 pCi/L. Farther out, Chester County, TN (37 miles away) at 0.0%, Colbert County, AL (46 miles away) at 36.6% and Franklin County, AL (52 miles away) at 18.6% have figures too.
EPA's 1993 map puts Alcorn County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Alcorn County, Geology
The ground under Alcorn County
PredictedMost of the ground under Alcorn County is one class on USGS's geologic map: 99.8% of its land is moderate radon potential, with 0.2% low. All of it lies in the area the map calls Pontotoc Ridge/Black Prairies, to which USGS gives a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Pontotoc Ridge/Black Prairies | Glauconitic sand, clay, sandy limestone, micaceous chalk, and lime. | Moderate | 9 | 99.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Alcorn County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Alcorn County's is. Of the 6 counties that border it, 2 have more high-potential ground, Hardin County, TN the most at 42.7%.
The map rates the ground, not the air in any home.
Local help
Alcorn County, Local resources
Radon testing and mitigation in Alcorn 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
Alcorn County, Questions
Questions about radon in Alcorn County
Are radon levels high in Alcorn County?
No CDC testing statistics are published here for Alcorn County, Mississippi yet. McNairy County, TN, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 8.2% of its tests at or above 4 pCi/L.
Which counties border Alcorn County?
Alcorn County borders 6 counties: McNairy County, TN, Prentiss County, MS, Tippah County, MS, Hardeman County, TN, Tishomingo County, MS and Hardin County, TN.
Products
Alcorn County, Products
Testing a home in Alcorn County
No CDC figure names Alcorn County; the nearest county with one, McNairy County, TN (20 miles away), reported 8.2% 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Alcorn County; a long-term test tells the year-round average.
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
Monitor
View Plus radon and air quality monitor
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Alcorn County, Bordering counties
Counties bordering Alcorn County
Calculated by Radon411- Radon levels in Hardeman County, TNEPA zone 3
20.0%at or above 4 pCi/L
Median 1.3 pCi/L · 5 tests
- Radon levels in Hardin County, TNEPA zone 2
10.3%at or above 4 pCi/L
Median 1.0 pCi/L · 29 tests
- Radon levels in McNairy County, TNEPA zone 2
8.2%at or above 4 pCi/L
Median 1.0 pCi/L · 49 tests
- Radon levels in Prentiss County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Tippah County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Tishomingo County, MSEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Alcorn County, Cities and towns
Cities and towns in Alcorn County
Alcorn County's population has barely moved since 2020: 34,569 residents on July 1, 2025 against 34,732 then, by the Census Bureau's estimates. That works out to 86 people per square mile of land. Its largest town, Corinth, has 14,345 residents, 41.5% of the total. Together its 5 incorporated places hold 49.7% of those residents; the other 50.3% live outside any of them.
From Corinth to Kossuth, CDC publishes no figure by town: each reads Alcorn County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Corinth | 14,345 | −1.8% | 41.5% |
| Farmington | 2,039 | −0.6% | 5.9% |
| Glen | 373 | +0.5% | 1.1% |
| Rienzi | 278 | −0.4% | 0.8% |
| Kossuth | 162 | −0.6% | 0.5% |
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).
Alcorn County, Homes
Homes in Alcorn County
Of Alcorn County's 16,242 homes, 66% are detached houses, against 69% across Mississippi; 17% are mobile homes. Half of its homes were built before 1981, close to Mississippi's 1986: 14% date from before 1960 and 20% from 2000 or later. 65% 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 | Alcorn County | Mississippi |
|---|---|---|
| Housing units | 16,242 | 1,332,811 |
| Detached houses | 66% | 69% |
| In buildings of 5 or more | 9% | 9% |
| Mobile homes | 17% | 15% |
| Built before 1960 | 14% | 15% |
| Built since 2000 | 20% | 28% |
| Middle year built | 1981 | 1986 |
| Owner-occupied | 65% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.