Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Throckmorton County, Texas
EPA puts Throckmorton 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
10.6%
Tarrant County, 115 miles
- Tarrant
- 10.6%
- Texas
- 10.4%
Share at 4+ pCi/L, 312 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Throckmorton
- 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 Throckmorton 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
Throckmorton County, At a glance
Throckmorton 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 Throckmorton County. Tarrant County, 115 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Throckmorton County, Compared
Throckmorton County radon figures, compared
Calculated by Radon411Throckmorton 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%.
The nearest counties with a figure are Tarrant County (115 miles away) at 10.6%, Denton County (121 miles away) at 7.2% and Dallas County (144 miles away) at 8.7%. 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 Throckmorton 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.
Throckmorton County, Geology
The ground under Throckmorton County
PredictedUSGS's geologic map puts all of Throckmorton County's mapped land in one class: low radon potential. All of it lies in the area the map calls Central Texas, 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 | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Throckmorton County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Throckmorton 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
Throckmorton County, Local resources
Radon testing and mitigation in Throckmorton 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
Throckmorton County, Questions
Questions about radon in Throckmorton County
Are radon levels high in Throckmorton County?
No CDC testing statistics are published here for Throckmorton County, Texas yet. Of the 8 nearest counties with a figure, within 188 miles, the share of tests at or above 4 pCi/L runs from 1.0% to 57.8%.
Which counties border Throckmorton County?
Throckmorton County borders 7 counties: Baylor County, Haskell County, Young County, Shackelford County, Stephens County, Knox County and Archer County.
Products
Throckmorton County, Products
Testing a home in Throckmorton County
No CDC figure names Throckmorton County; the nearest county with one, Tarrant County (115 miles away), reported 10.6% 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 Throckmorton 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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Throckmorton County, Bordering counties
Counties bordering Throckmorton County
Calculated by Radon411- Radon levels in Stephens CountyEPA zone 3
100.0%at or above 4 pCi/L
Median 6.3 pCi/L · 1 test
- Radon levels in Shackelford CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 1 test
- Radon levels in Baylor CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Haskell CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Young CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Knox CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Archer CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Throckmorton County, Cities and towns
Cities and towns in Throckmorton County
Throckmorton County is growing: the Census Bureau puts it at 1,554 residents on July 1, 2025, up 6.7% from 1,457 in 2020. Spread over its land, that is 1.7 people to the square mile. Its largest town, Throckmorton, has 776 residents, 49.9% of the total. Together its 2 incorporated places hold 65.2% of those residents; the other 34.8% live outside any of them. CDC publishes no radon test count for Throckmorton County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Throckmorton to Woodson, CDC publishes no figure by town: each reads Throckmorton County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Throckmorton | 776 | +5.9% | 49.9% |
| Woodson | 237 | +7.2% | 15.3% |
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).
Throckmorton County, Homes
Homes in Throckmorton County
Throckmorton County is a place of houses on their own lots: 81% of its 960 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1961 (1990 for Texas), and 48% date from before 1960. 73% of occupied homes are lived in by their owner (Texas: 63%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Throckmorton County | Texas |
|---|---|---|
| Housing units | 960 | 11,890,808 |
| Detached houses | 81% | 65% |
| In buildings of 5 or more | under 1% | 21% |
| Mobile homes | 11% | 7% |
| Built before 1960 | 48% | 13% |
| Built since 2000 | 6% | 37% |
| Middle year built | 1961 | 1990 |
| Owner-occupied | 73% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.