Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Edwards County, Texas
EPA puts Edwards 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
6.6%
Bexar County, 113 miles
- Bexar
- 6.6%
- Texas
- 10.4%
Share at 4+ pCi/L, 197 tests, 2007 to 2016
Ground above low
None
27.3 pts below Texas
- Edwards
- 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 Edwards 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
Edwards County, At a glance
Edwards 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 Edwards County. Bexar County, 113 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.
Edwards County, Compared
Edwards County radon figures, compared
Calculated by Radon411No CDC figure names Edwards 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 Bexar County (113 miles away) at 6.6%, Travis County (153 miles away) at 9.3% and Midland County (166 miles away) at 1.0%. 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 Edwards 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.
Edwards County, Geology
The ground under Edwards County
PredictedUSGS's geologic map puts all of Edwards 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.
Edwards County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Edwards County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Val Verde County the most at 14.5%.
The map rates the ground, not the air in any home.
Local help
Edwards County, Local resources
Radon testing and mitigation in Edwards 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
Edwards County, Questions
Questions about radon in Edwards County
Are radon levels high in Edwards County?
No CDC testing statistics are published here for Edwards County, Texas yet. Of the 8 nearest counties with a figure, within 244 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 17.1%.
Which counties border Edwards County?
Edwards County borders 7 counties: Real County, Sutton County, Kinney County, Val Verde County, Kimble County, Uvalde County and Kerr County.
Products
Edwards County, Products
Testing a home in Edwards County
No CDC figure names Edwards County; the nearest county with one, Bexar County (113 miles away), reported 6.6% 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 Edwards 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
MonitorX-Sense
XR0A-SR battery digital radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- 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
Edwards County, Bordering counties
Counties bordering Edwards County
Calculated by Radon411- Radon levels in Kerr CountyEPA zone 3
12.5%at or above 4 pCi/L
Median 1.1 pCi/L · 16 tests
- Radon levels in Kimble CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.1 pCi/L · 1 test
- Radon levels in Real CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Sutton CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Kinney CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Val Verde CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Uvalde CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Edwards County, Cities and towns
Cities and towns in Edwards County
About 1,370 people live in Edwards County by the Census Bureau's estimate for July 1, 2025, 51 fewer than in 2020 (−3.6%). Spread over its land, that is 0.6 people to the square mile. Rocksprings, its one incorporated place, has 851 residents, 62.1% of the total. CDC publishes no radon test count for Edwards County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).
Rocksprings is the one incorporated place here; CDC publishes no figure by town, so it reads Edwards County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Rocksprings | 851 | −3.6% | 62.1% |
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).
Edwards County, Homes
Homes in Edwards County
Edwards County is a place of houses on their own lots: 76% of its 903 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1966 (1990 for Texas), and 41% date from before 1960. Owners live in 95% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Edwards County | Texas |
|---|---|---|
| Housing units | 903 | 11,890,808 |
| Detached houses | 76% | 65% |
| In buildings of 5 or more | 0% | 21% |
| Mobile homes | 23% | 7% |
| Built before 1960 | 41% | 13% |
| Built since 2000 | 18% | 37% |
| Middle year built | 1966 | 1990 |
| Owner-occupied | 95% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.