Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Reagan County, Texas
EPA puts Reagan 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
Highest bordering
1.0%
Midland County
- Midland
- 1.0%
1 of 7 neighbours have 30+ tests, 2007 to 2016
Nearest county
1.0%
Midland County, 46 miles
- Midland
- 1.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 100 tests, 2007 to 2016
Ground above low
67.2%
39.9 pts above Texas
- Reagan
- 67.2%
- 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 Reagan 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
Reagan County, At a glance
Reagan County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Moderate across 67% 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 Reagan County. Midland County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 1.0% of its tests at or above 4 pCi/L.
Reagan County, Compared
Reagan County radon figures, compared
Calculated by Radon411Reagan 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%.
Midland County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 1.0% of its tests at or above 4 pCi/L. Farther out, Lubbock County (156 miles away) at 57.8%, Bexar County (223 miles away) at 6.6% and Travis County (233 miles away) at 9.3% have figures too. 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 Reagan County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 67% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Reagan County, Geology
The ground under Reagan County
PredictedUSGS's geologic map splits Reagan County: 67.2% of its land is moderate radon potential and 32.8% low. The map puts 67.2% of Reagan County in the area it calls Northern High Plains and Plateaus and 32.8% in Southern High Plains and Plateaus. 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 | 67.2% |
| Southern High Plains and Plateaus | Paleozoic and Mesozoic sandstone, limestone, shale. | Low | 7 | 32.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Reagan County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Reagan County's is. Of the 7 counties that border it, 1 has more moderate-potential ground, Glasscock County the most at 84.0%.
The map rates the ground, not the air in any home.
Local help
Reagan County, Local resources
Radon testing and mitigation in Reagan 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
Reagan County, Questions
Questions about radon in Reagan County
Are radon levels high in Reagan County?
No CDC testing statistics are published here for Reagan County, Texas yet. Midland County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 1.0% of its tests at or above 4 pCi/L.
Which counties border Reagan County?
Reagan County borders 7 counties: Upton County, Irion County, Glasscock County, Crockett County, Midland County, Sterling County and Tom Green County.
Products
Reagan County, Products
Testing a home in Reagan County
No CDC figure names Reagan County; the nearest county with one, Midland County (46 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 Reagan 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
RadonEye RD200 plug-in continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- 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
Reagan County, Bordering counties
Counties bordering Reagan 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 Midland CountyEPA zone 3
1.0%at or above 4 pCi/L
Median 0.7 pCi/L · 100 tests
- Radon levels in Upton CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Irion CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Glasscock 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.
- Radon levels in Sterling CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Reagan County, Cities and towns
Cities and towns in Reagan County
Reagan County has been losing residents: from 3,423 in 2020 to 3,166 on July 1, 2025, a fall of 7.5% by the Census Bureau's estimates. Spread over its land, that is 2.7 people to the square mile. Big Lake, its one incorporated place, has 2,783 residents, 87.9% of the total. CDC publishes no radon test count for Reagan County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
Big Lake is the one incorporated place here; CDC publishes no figure by town, so it reads Reagan County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Big Lake | 2,783 | −7.4% | 87.9% |
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).
Reagan County, Homes
Homes in Reagan County
Reagan County is a place of houses on their own lots: 76% of its 1,379 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 22% date from before 1960. Owners live in 76% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Reagan County | Texas |
|---|---|---|
| Housing units | 1,379 | 11,890,808 |
| Detached houses | 76% | 65% |
| In buildings of 5 or more | 3% | 21% |
| Mobile homes | 20% | 7% |
| Built before 1960 | 22% | 13% |
| Built since 2000 | 12% | 37% |
| Middle year built | 1980 | 1990 |
| Owner-occupied | 76% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.