Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Irion County, Texas
EPA puts Irion 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
1.0%
Midland County, 73 miles
- Midland
- 1.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 100 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Irion
- 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 Irion 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
Irion County, At a glance
Irion 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 Irion County. Midland County, 73 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Irion County, Compared
Irion County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2007 to 2016 laboratory totals cover 140 Texas counties, and Irion 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 Midland County (73 miles away) at 1.0%, Lubbock County (166 miles away) at 57.8% and Bexar County (195 miles away) at 6.6%. 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 Irion 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.
Irion County, Geology
The ground under Irion County
PredictedUSGS's geologic map puts all of Irion County's mapped land in one class: low radon potential. All of it lies in the area the map calls Southern High Plains and Plateaus, 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 |
|---|---|---|---|---|
| Southern High Plains and Plateaus | Paleozoic and Mesozoic sandstone, limestone, shale. | 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.
Irion County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Irion County's is. Of the 4 counties that border it, 3 have more moderate-potential ground, Reagan County the most at 67.2%.
The map rates the ground, not the air in any home.
Local help
Irion County, Local resources
Radon testing and mitigation in Irion 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
Irion County, Questions
Questions about radon in Irion County
Are radon levels high in Irion County?
No CDC testing statistics are published here for Irion County, Texas yet. Of the 8 nearest counties with a figure, within 239 miles, the share of tests at or above 4 pCi/L runs from 1.0% to 57.8%.
Which counties border Irion County?
Irion County borders 4 counties: Reagan County, Tom Green County, Schleicher County and Crockett County.
Products
Irion County, Products
Testing a home in Irion County
No CDC figure names Irion County; the nearest county with one, Midland County (73 miles away), reported 1.0% 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 Irion County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Monitor
View Plus radon and air quality monitor
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Irion County, Bordering counties
Counties bordering Irion County
Calculated by Radon411- Radon levels in Tom Green CountyEPA zone 3
33.3%at or above 4 pCi/L
Median 2.0 pCi/L · 6 tests
- Radon levels in Reagan CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Schleicher CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Crockett CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Irion County, Cities and towns
Cities and towns in Irion County
About 1,463 people live in Irion County by the Census Bureau's estimate for July 1, 2025, 43 fewer than in 2020 (−2.9%). Spread over its land, that is 1.4 people to the square mile. Mertzon, its one incorporated place, has 726 residents, 49.6% of the total. CDC publishes no radon test count for Irion County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
Mertzon is the one incorporated place here; CDC publishes no figure by town, so it reads Irion County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mertzon | 726 | −2.8% | 49.6% |
One incorporated place, 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).
Irion County, Homes
Homes in Irion County
Irion County is a place of houses on their own lots: 79% of its 795 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1980 (1990 for Texas), and 26% date from before 1960. Owners live in 89% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Irion County | Texas |
|---|---|---|
| Housing units | 795 | 11,890,808 |
| Detached houses | 79% | 65% |
| In buildings of 5 or more | 0% | 21% |
| Mobile homes | 21% | 7% |
| Built before 1960 | 26% | 13% |
| Built since 2000 | 12% | 37% |
| Middle year built | 1980 | 1990 |
| Owner-occupied | 89% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.