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 Hardeman County, Texas
EPA puts Hardeman 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
57.8%
Lubbock County, 128 miles
- Lubbock
- 57.8%
- Texas
- 10.4%
Share at 4+ pCi/L, 128 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Hardeman
- 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 Hardeman 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
Hardeman County, At a glance
Hardeman 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 Hardeman County. Lubbock County, 128 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Hardeman County, Compared
Hardeman County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2007 to 2016 laboratory totals cover 140 Texas counties, and Hardeman 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 Lubbock County (128 miles away) at 57.8%, Randall County (131 miles away) at 71.4% and Potter County (144 miles away) at 20.0%. 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 Hardeman 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.
Hardeman County, Geology
The ground under Hardeman County
PredictedUSGS's geologic map puts all of Hardeman 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 | 99.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hardeman County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Hardeman County's is. None of the 6 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Hardeman County, Local resources
Radon testing and mitigation in Hardeman 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
Hardeman County, Questions
Questions about radon in Hardeman County
Are radon levels high in Hardeman County?
No CDC testing statistics are published here for Hardeman County, Texas yet. Of the 8 nearest counties with a figure, within 213 miles, the share of tests at or above 4 pCi/L runs from 1.0% to 71.4%.
Which counties border Hardeman County?
Hardeman County borders 6 counties: Foard County, TX, Jackson County, OK, Childress County, TX, Wilbarger County, TX, Harmon County, OK and Cottle County, TX.
Products
Hardeman County, Products
Testing a home in Hardeman County
No CDC figure names Hardeman County; the nearest county with one, Lubbock County (128 miles away), reported 57.8% 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 Hardeman 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
Hardeman County, Bordering counties
Counties bordering Hardeman County
Calculated by Radon411- Radon levels in Jackson County, OKEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Childress County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 1.1 pCi/L · 1 test
- Radon levels in Wilbarger County, TXEPA zone 3
0.0%at or above 4 pCi/L
Median 2.6 pCi/L · 1 test
- Radon levels in Foard County, TXEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Harmon County, OKEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Cottle County, TXEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Hardeman County, Cities and towns
Cities and towns in Hardeman County
Hardeman County has been losing residents: from 3,558 in 2020 to 3,292 on July 1, 2025, a fall of 7.5% by the Census Bureau's estimates. Spread over its land, that is 4.7 people to the square mile. Quanah alone is home to 2,097 of them, 63.7% of the total. Together its 2 incorporated places hold 79.3% of those residents; the other 20.7% live outside any of them. CDC publishes no radon test count for Hardeman County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Quanah to Chillicothe, CDC publishes no figure by town: each reads Hardeman County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Quanah | 2,097 | −8.1% | 63.7% |
| Chillicothe | 513 | −7.9% | 15.6% |
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).
Hardeman County, Homes
Homes in Hardeman County
Hardeman County is a place of houses on their own lots: 76% of its 1,866 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 49% date from before 1960. 70% 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 | Hardeman County | Texas |
|---|---|---|
| Housing units | 1,866 | 11,890,808 |
| Detached houses | 76% | 65% |
| In buildings of 5 or more | 3% | 21% |
| Mobile homes | 13% | 7% |
| Built before 1960 | 49% | 13% |
| Built since 2000 | 9% | 37% |
| Middle year built | 1961 | 1990 |
| Owner-occupied | 70% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.