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 Coke County, Texas
EPA puts Coke 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, 88 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
- Coke
- 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 Coke 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
Coke County, At a glance
Coke 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 Coke County. Midland County, 88 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Coke County, Compared
Coke County radon figures, compared
Calculated by Radon411No CDC figure names Coke County, in any year or ten-year total; over the 2007 to 2016 laboratory totals, the agency's counts reach 140 Texas counties without 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 (88 miles away) at 1.0%, Lubbock County (140 miles away) at 57.8% and Bell County (190 miles away) at 14.3%. 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 Coke 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.
Coke County, Geology
The ground under Coke County
PredictedUSGS's geologic map puts all of Coke County's mapped land in one class: low radon potential. The map puts 86.4% of Coke County in the area it calls Central Texas and 13.6% in Southern High Plains and Plateaus. USGS gives both 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 | 86.4% |
| Southern High Plains and Plateaus | Paleozoic and Mesozoic sandstone, limestone, shale. | Low | 7 | 13.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Coke County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Coke County's is. Of the 5 counties that border it, 3 have more moderate-potential ground, Mitchell County the most at 61.5%.
The map rates the ground, not the air in any home.
Local help
Coke County, Local resources
Radon testing and mitigation in Coke 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
Coke County, Questions
Questions about radon in Coke County
Are radon levels high in Coke County?
No CDC testing statistics are published here for Coke County, Texas yet. Of the 8 nearest counties with a figure, within 206 miles, the share of tests at or above 4 pCi/L runs from 1.0% to 57.8%.
Which counties border Coke County?
Coke County borders 5 counties: Nolan County, Sterling County, Runnels County, Mitchell County and Tom Green County.
Products
Coke County, Products
Testing a home in Coke County
No CDC figure names Coke County; the nearest county with one, Midland County (88 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 Coke 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
MonitorSafetySiren
Pro4 plug-in radon detector with a display and alarm
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 48 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Coke County, Bordering counties
Counties bordering Coke 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 Nolan CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 3 tests
- Radon levels in Runnels CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 1 test
- Radon levels in Sterling CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Mitchell CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Coke County, Cities and towns
Cities and towns in Coke County
The Census Bureau estimates 3,412 residents in Coke County for July 1, 2025, 91 more than in 2020 (+2.7%). Spread over its land, that is 3.7 people to the square mile. Its largest town, Robert Lee, has 1,061 residents, 31.1% of the total. CDC publishes no radon test count for Coke County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
From Robert Lee to Blackwell, CDC publishes no figure by town: each reads Coke County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Robert Lee | 1,061 | +1.2% | 31.1% |
| Bronte | 981 | +4.1% | 28.8% |
| Blackwellextends beyond Coke County | 251 | −3.5% | Counted whole |
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). A place that extends beyond Coke County is counted whole, so it has no share.
Coke County, Homes
Homes in Coke County
Of Coke County's 2,147 homes, 69% are detached houses, against 65% across Texas; 20% are mobile homes. The homes are older than Texas' as a whole: half were built before 1976 (1990 for Texas), and 27% date from before 1960. 71% 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 | Coke County | Texas |
|---|---|---|
| Housing units | 2,147 | 11,890,808 |
| Detached houses | 69% | 65% |
| In buildings of 5 or more | 3% | 21% |
| Mobile homes | 20% | 7% |
| Built before 1960 | 27% | 13% |
| Built since 2000 | 6% | 37% |
| Middle year built | 1976 | 1990 |
| Owner-occupied | 71% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.