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 Leon County, Texas
EPA puts Leon County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2005 to 2014, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
0.0%
Brazos County
- Brazos
- 0.0%
1 of 7 neighbours have 30+ tests, 2007 to 2016
Nearest county
0.0%
Brazos County, 47 miles
- Brazos
- 0.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 49 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Leon
- 0.0%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
1
Too few for a share
- Leon
- 1
- Needed
- 30
2005 to 2014, laboratory
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 Leon 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
Leon County, At a glance
Leon 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
Radon tests reported for Leon County, 2005 to 2014, laboratory
CDC holds 1 reported test for Leon County over the 2005 to 2014 laboratory totals, a result of 0.6 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Leon County beside the counties around it is how this page reads it.
What these figures count
Only 1 test was reported to CDC for Leon County over 2005 to 2014 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Measured data period: 2005 to 2014.
Leon County, Compared
Leon County radon figures, compared
Calculated by Radon411CDC's largest figure for Leon County rests on 1 test over the 2005 to 2014 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 0.6 pCi/L, with a middle value of 0.6 pCi/L.
Brazos County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L. Farther out, McLennan County (73 miles away) at 17.1%, Montgomery County (75 miles away) at 7.1% and Smith County (86 miles away) at 9.1% have figures too. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Statewide for the same period, Randall County reported the highest share (71.4%) and Nueces County the lowest (0.0%). EPA's 1993 map puts Leon 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.
Leon County, Geology
The ground under Leon County
PredictedUSGS's geologic map puts all of Leon County's mapped land in one class: low radon potential. All of it lies in the area the map calls East Texas Province, 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 |
|---|---|---|---|---|
| East Texas Province | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | 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.
Leon County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Leon 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
Leon County, Local resources
Radon testing and mitigation in Leon County
- Texas Radon GroupTexas Radon Group, run by Texas Tech University, does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Texas.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The Texas Radon Group offers free radon test kits for Texas individuals who qualify.
- Compare kits
- Professionals in Texas7 professionals are listed in Texas.
What Texas's program says
- Licensing of radon professionals
There are no radon certification requirements for the State of Texas at this time, but the National Radon Proficiency Program lists radon testers and mitigators within Texas that have passed a rigorous national certification program.
What it means
Leon County, Questions
Questions about radon in Leon County
Are radon levels high in Leon County?
Over the 2005 to 2014 laboratory totals, 0.0% of the radon tests reported to CDC for Leon County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.6 pCi/L. Brazos County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L.
Which counties border Leon County?
Leon County borders 7 counties: Madison County, Freestone County, Limestone County, Houston County, Robertson County, Anderson County and Brazos County.
Products
Leon County, Products
Testing a home in Leon County
No CDC figure names Leon County; the nearest county with one, Brazos County (47 miles away), reported 0.0% of its tests at or above 4 pCi/L over the 2007 to 2016 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 Leon 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
Monitor
View Radon Wi-Fi radon monitor with an e-paper display
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Leon County, Bordering counties
Counties bordering Leon County
Calculated by Radon411- Radon levels in Madison CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 1 test
- Radon levels in Freestone CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 10 tests
- Radon levels in Limestone CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 2 tests
- Radon levels in Robertson CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 7 tests
- Radon levels in Brazos CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 49 tests
- Radon levels in Houston CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Anderson CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Leon County, Cities and towns
Cities and towns in Leon County
Leon County is growing: the Census Bureau puts it at 16,894 residents on July 1, 2025, up 7.1% from 15,775 in 2020. That works out to 16 people per square mile of land. No town dominates: Buffalo, the largest, has 1,906 residents, 11.3% of the total. Reported testing is thin here: 1 test over 2005 to 2014, or 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.
From Buffalo to Leona, CDC publishes no figure by town: each reads Leon County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Buffalo | 1,906 | +7.9% | 11.3% |
| Centerville | 1,006 | +5.8% | 6.0% |
| Jewett | 845 | +6.0% | 5.0% |
| Normangeeextends beyond Leon County | 563 | +11.3% | Counted whole |
| Oakwoodextends beyond Leon County | 405 | +4.7% | Counted whole |
| Marquez | 199 | +7.6% | 1.2% |
| Leona | 173 | +9.5% | 1.0% |
7 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 Leon County is counted whole, so it has no share.
Leon County, Homes
Homes in Leon County
Of Leon County's 9,018 homes, 58% are detached houses, against 65% across Texas; 38% are mobile homes. Half of its homes were built before 1992, close to Texas' 1990: 11% date from before 1960 and 35% from 2000 or later. Owners live in 77% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Leon County | Texas |
|---|---|---|
| Housing units | 9,018 | 11,890,808 |
| Detached houses | 58% | 65% |
| In buildings of 5 or more | 2% | 21% |
| Mobile homes | 38% | 7% |
| Built before 1960 | 11% | 13% |
| Built since 2000 | 35% | 37% |
| Middle year built | 1992 | 1990 |
| Owner-occupied | 77% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.