Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Gray County, Texas
EPA puts Gray County in Zone 2, its middle radon zone, and only 3 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
20.0%
Potter County, 61 miles
- Potter
- 20.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 70 tests, 2007 to 2016
Ground above low
93.0%
65.7 pts above Texas
- Gray
- 93.0%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
5
Too few for a share
- Gray
- 5
- Needed
- 30
2005 to 2014, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Gray 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
Gray County, At a glance
Gray County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Gray County is a
USGS geologic potential: Moderate across 93% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Gray County, 2008 to 2017, laboratory
CDC holds 3 reported tests for Gray County over the 2008 to 2017 laboratory totals, with a median of 1.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Gray County beside the counties around it is how this page reads it.
What these figures count
Only 3 tests were reported to CDC for Gray County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Gray County, Compared
Gray County radon figures, compared
Calculated by Radon411CDC's largest figure for Gray County rests on 5 tests over the 2005 to 2014 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 20.0 points and no rank or comparison is drawn from it. Results reached as high as 2.5 pCi/L, with a middle value of 1.6 pCi/L.
The nearest counties with a figure are Potter County (61 miles away) at 20.0%, Randall County (68 miles away) at 71.4% and Lubbock County (136 miles away) at 57.8%. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.
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 Gray County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 93% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Gray County, Geology
The ground under Gray County
PredictedMost of the ground under Gray County is one class on USGS's geologic map: 93.0% of its land is moderate radon potential, with 7.0% low. The map puts 93.0% of Gray County in the area it calls Northern High Plains and Plateaus and 7.0% in Central Texas. USGS gives the first a radon index of 10, in the moderate band (9 to 11), and the second 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Northern High Plains and Plateaus | Tertiary sandstone, siltstone, shale. | Moderate | 10 | 93.0% |
| Central Texas | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 7.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Gray County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Gray County's is. Of the 7 counties that border it, 3 have more moderate-potential ground, Carson County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Gray County, Local resources
Radon testing and mitigation in Gray 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
Gray County, Questions
Questions about radon in Gray County
Are radon levels high in Gray County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Gray County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of the 8 nearest counties with a figure, within 294 miles, the share of tests at or above 4 pCi/L runs from 1.0% to 71.4%.
Which counties border Gray County?
Gray County borders 7 counties: Donley County, Roberts County, Carson County, Wheeler County, Hemphill County, Armstrong County and Collingsworth County.
Products
Gray County, Products
Testing a home in Gray County
No CDC figure names Gray County; the nearest county with one, Potter County (61 miles away), reported 20.0% 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. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Gray County; a long-term test tells the year-round average.
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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Gray County, Bordering counties
Counties bordering Gray County
Calculated by Radon411- Radon levels in Donley CountyEPA zone 2
100.0%at or above 4 pCi/L
Median 4.0 pCi/L · 1 test
- Radon levels in Carson CountyEPA zone 2
100.0%at or above 4 pCi/L
Median 36.2 pCi/L · 2 tests
- Radon levels in Collingsworth CountyEPA zone 3
100.0%at or above 4 pCi/L
Median 12.6 pCi/L · 1 test
- Radon levels in Wheeler CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.7 pCi/L · 3 tests
- Radon levels in Hemphill CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 3.9 pCi/L · 1 test
- Radon levels in Roberts CountyEPA zone 2
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Armstrong CountyEPA zone 2
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Gray County, Cities and towns
Cities and towns in Gray County
About 20,919 people live in Gray County by the Census Bureau's estimate for July 1, 2025, 278 fewer than in 2020 (−1.3%). That works out to 23 people per square mile of land. Pampa alone is home to 16,414 of them, 78.5% of the total. Together its 3 incorporated places hold 83.5% of those residents; the other 16.5% live outside any of them. Testing is reported here more often than across the state: CDC's 5 reported tests for 2005 to 2014 come to 0.2 for every 1,000 residents (2025 estimate), against 0.1 for Texas.
From Pampa to Lefors, CDC publishes no figure by town: each reads Gray County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Pampa | 16,414 | −2.7% | 78.5% |
| McLean | 634 | −3.8% | 3.0% |
| Lefors | 426 | +0.7% | 2.0% |
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).
Gray County, Homes
Homes in Gray County
Gray County is a place of houses on their own lots: 87% of its 9,975 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1959 (1990 for Texas), and 53% 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 | Gray County | Texas |
|---|---|---|
| Housing units | 9,975 | 11,890,808 |
| Detached houses | 87% | 65% |
| In buildings of 5 or more | 6% | 21% |
| Mobile homes | 4% | 7% |
| Built before 1960 | 53% | 13% |
| Built since 2000 | 7% | 37% |
| Middle year built | 1959 | 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.