Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Union County, Mississippi
EPA puts Union 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
Nearest county
8.2%
McNairy County, 53 miles
- McNairy
- 8.2%
Share at 4+ pCi/L, 49 tests, 2006 to 2015
Ground above low
53.4%
45.2 pts above MS
- Union
- 53.4%
- 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 Union 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
Union County, At a glance
Union County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Union County is a
USGS geologic potential: Moderate across 53% 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 Union County. McNairy County, TN, 53 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Union County, Compared
Union County radon figures, compared
Calculated by Radon411CDC publishes no radon test figure for Union 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 McNairy County, TN (53 miles away) at 8.2%, Fayette County, TN (54 miles away) at 13.1% and Franklin County, AL (66 miles away) at 18.6%.
EPA's 1993 map puts Union County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 53% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Union County, Geology
The ground under Union County
PredictedUSGS's geologic map splits Union County: 53.4% of its land is moderate radon potential and 46.6% low. The map puts 53.4% of Union County in the area it calls Pontotoc Ridge/Black Prairies and 46.6% in North Central Hills/Flatwoods. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 8, in the low band (5 to 8).
| 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 | 53.4% |
| North Central Hills/Flatwoods | Tertiary nonmarine to deltaic sediments ranging from sand to clay. | Low | 8 | 46.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Union County beside the ground around it
Across Mississippi 0.1% of the land is rated high; none of Union County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Lee County the most at 97.6%.
The map rates the ground, not the air in any home.
Local help
Union County, Local resources
Radon testing and mitigation in Union 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
Union County, Questions
Questions about radon in Union County
Are radon levels high in Union County?
No CDC testing statistics are published here for Union County, Mississippi yet. Of the 8 nearest counties with a figure, within 82 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 36.6%.
Which counties border Union County?
Union County borders 7 counties: Pontotoc County, Benton County, Tippah County, Lee County, Lafayette County, Prentiss County and Marshall County.
Products
Union County, Products
Testing a home in Union County
No CDC figure names Union County; the nearest county with one, McNairy County, TN (53 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 Union 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
MonitorINKBIRD
INK-RD3 battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Union County, Bordering counties
Counties bordering Union County
Calculated by Radon411counties bordering Union County: 1 of 7
Union County, Cities and towns
Cities and towns in Union County
The Census Bureau estimates 28,459 residents in Union County for July 1, 2025, 647 more than in 2020 (+2.3%). That works out to 68 people per square mile of land. Its largest town, New Albany, has 7,756 residents, 27.3% of the total.
From New Albany to Blue Springs, CDC publishes no figure by town: each reads Union County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| New Albany | 7,756 | +1.6% | 27.3% |
| Shermanextends beyond Union County | 680 | +13.3% | Counted whole |
| Myrtle | 487 | +1.2% | 1.7% |
| Blue Springs | 446 | +2.1% | 1.6% |
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 Union County is counted whole, so it has no share.
Union County, Homes
Homes in Union County
Of Union County's 12,195 homes, 71% are detached houses, against 69% across Mississippi; 21% are mobile homes. Half of its homes were built before 1985, close to Mississippi's 1986: 17% date from before 1960 and 24% from 2000 or later. 75% 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 | Union County | Mississippi |
|---|---|---|
| Housing units | 12,195 | 1,332,811 |
| Detached houses | 71% | 69% |
| In buildings of 5 or more | 3% | 9% |
| Mobile homes | 21% | 15% |
| Built before 1960 | 17% | 15% |
| Built since 2000 | 24% | 28% |
| Middle year built | 1985 | 1986 |
| Owner-occupied | 75% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.