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 Comanche County, Texas
EPA puts Comanche 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
17.1%
McLennan County, 84 miles
- McLennan
- 17.1%
- Texas
- 10.4%
Share at 4+ pCi/L, 41 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Comanche
- 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 Comanche 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
Comanche County, At a glance
Comanche 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 Comanche County. McLennan County, 84 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Comanche County, Compared
Comanche County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2007 to 2016 laboratory totals cover 140 Texas counties, and Comanche County is not among them: no year's figure and no ten-year laboratory total names it. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.
The nearest counties with a figure are McLennan County (84 miles away) at 17.1%, Bell County (89 miles away) at 14.3% and Tarrant County (93 miles away) at 10.6%. 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 Comanche 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.
Comanche County, Geology
The ground under Comanche County
PredictedUSGS's geologic map puts all of Comanche County's mapped land in one class: low radon potential. 99.4% of it lies in the area the map calls Central Texas/Gulf Coast Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Texas/Gulf Coast Plain | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 99.4% |
| Central Texas | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 0.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Comanche County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Comanche County's is. None of the 5 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Comanche County, Local resources
Radon testing and mitigation in Comanche 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
Comanche County, Questions
Questions about radon in Comanche County
Are radon levels high in Comanche County?
No CDC testing statistics are published here for Comanche County, Texas yet. Of the 8 nearest counties with a figure, within 144 miles, the share of tests at or above 4 pCi/L runs from 2.0% to 17.1%.
Which counties border Comanche County?
Comanche County borders 5 counties: Brown County, Eastland County, Erath County, Hamilton County and Mills County.
Products
Comanche County, Products
Testing a home in Comanche County
No CDC figure names Comanche County; the nearest county with one, McLennan County (84 miles away), reported 17.1% 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 Comanche 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
RadonPro Wi-Fi radon monitor with a built-in Geiger counter
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Comanche County, Bordering counties
Counties bordering Comanche County
Calculated by Radon411- Radon levels in Brown CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.8 pCi/L · 1 test
- Radon levels in Eastland CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Hamilton CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Erath CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Mills CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Comanche County, Cities and towns
Cities and towns in Comanche County
Comanche County is growing: the Census Bureau puts it at 14,432 residents on July 1, 2025, up 5.8% from 13,635 in 2020. That works out to 15 people per square mile of land. Its largest town, Comanche, has 4,420 residents, 30.6% of the total. Together its 3 incorporated places hold 50.0% of those residents; the other 50.0% live outside any of them. CDC publishes no radon test count for Comanche County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Comanche to Gustine, CDC publishes no figure by town: each reads Comanche County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Comanche | 4,420 | +5.0% | 30.6% |
| De Leon | 2,370 | +4.6% | 16.4% |
| Gustine | 419 | +6.1% | 2.9% |
3 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).
Comanche County, Homes
Homes in Comanche County
Comanche County is a place of houses on their own lots: 80% of its 6,940 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1977 (1990 for Texas), and 30% date from before 1960. Owners live in 80% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Comanche County | Texas |
|---|---|---|
| Housing units | 6,940 | 11,890,808 |
| Detached houses | 80% | 65% |
| In buildings of 5 or more | 2% | 21% |
| Mobile homes | 15% | 7% |
| Built before 1960 | 30% | 13% |
| Built since 2000 | 18% | 37% |
| Middle year built | 1977 | 1990 |
| Owner-occupied | 80% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.