Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Lee County, Texas
EPA puts Lee 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
Highest bordering
2.0%
Williamson County
- Williamson
- 2.0%
1 of 6 neighbours have 30+ tests, 2007 to 2016
Nearest county
2.0%
Williamson County, 44 miles
- Williamson
- 2.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 98 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Lee
- 0.0%
- Texas
- 27.3%
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 Lee 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
Lee County, At a glance
Lee 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 Lee County. Williamson County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 2.0% of its tests at or above 4 pCi/L.
Lee County, Compared
Lee County radon figures, compared
Calculated by Radon411Lee County has no radon test figure of its own from CDC, whose counts over the 2007 to 2016 laboratory totals name 140 other Texas counties and leave it out. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.
Williamson County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 2.0% of its tests at or above 4 pCi/L. Farther out, Brazos County (46 miles away) at 0.0%, Travis County (49 miles away) at 9.3% and Bell County (59 miles away) at 14.3% have figures too. 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 Lee 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.
Lee County, Geology
The ground under Lee County
PredictedUSGS's geologic map puts all of Lee 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.
Lee County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Lee County's is. Of the 6 counties that border it, 1 has more moderate-potential ground, Williamson County the most at 15.4%.
The map rates the ground, not the air in any home.
Local help
Lee County, Local resources
Radon testing and mitigation in Lee 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
Lee County, Questions
Questions about radon in Lee County
Are radon levels high in Lee County?
No CDC testing statistics are published here for Lee County, Texas yet. Williamson County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 2.0% of its tests at or above 4 pCi/L.
Which counties border Lee County?
Lee County borders 6 counties: Burleson County, Bastrop County, Washington County, Fayette County, Milam County and Williamson County.
Products
Lee County, Products
Testing a home in Lee County
No CDC figure names Lee County; the nearest county with one, Williamson County (44 miles away), reported 2.0% 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 Lee 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
Wave Radon battery smart radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Lee County, Bordering counties
Counties bordering Lee County
Calculated by Radon411- Radon levels in Bastrop CountyEPA zone 3
80.0%at or above 4 pCi/L
Median 11.8 pCi/L · 10 tests
- Radon levels in Williamson CountyEPA zone 3
2.0%at or above 4 pCi/L
Median 0.7 pCi/L · 98 tests
- Radon levels in Fayette CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 6 tests
- Radon levels in Burleson CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Washington CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Milam CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Lee County, Cities and towns
Cities and towns in Lee County
Lee County is growing: the Census Bureau puts it at 18,729 residents on July 1, 2025, up 7.0% from 17,504 in 2020. That works out to 30 people per square mile of land. Its largest town, Giddings, has 5,425 residents, 29.0% of the total. Together its 2 incorporated places hold 36.1% of those residents; the other 63.9% live outside any of them. CDC publishes no radon test count for Lee County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Giddings to Lexington, CDC publishes no figure by town: each reads Lee County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Giddings | 5,425 | +8.6% | 29.0% |
| Lexington | 1,342 | +10.1% | 7.2% |
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).
Lee County, Homes
Homes in Lee County
Of Lee County's 7,924 homes, 71% are detached houses, against 65% across Texas; 23% are mobile homes. Half of its homes were built before 1992, close to Texas' 1990: 16% date from before 1960 and 34% from 2000 or later. Owners live in 78% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Lee County | Texas |
|---|---|---|
| Housing units | 7,924 | 11,890,808 |
| Detached houses | 71% | 65% |
| In buildings of 5 or more | 2% | 21% |
| Mobile homes | 23% | 7% |
| Built before 1960 | 16% | 13% |
| Built since 2000 | 34% | 37% |
| Middle year built | 1992 | 1990 |
| Owner-occupied | 78% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.