Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
Locations and reports
Radon Levels in Burnet County, Texas
EPA puts Burnet County in Zone 3, its lowest radon zone, and only 7 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
Highest bordering
14.3%
Bell County
- Bell
- 14.3%
- Williamson
- 2.0%
3 of 7 neighbours have 30+ tests, 2007 to 2016
Nearest county
2.0%
Williamson County, 36 miles
- Williamson
- 2.0%
- Texas
- 10.4%
Share at 4+ pCi/L, 98 tests, 2007 to 2016
Ground above low
28.7%
1.4 pts above Texas
- Burnet
- 28.7%
- Texas
- 27.3%
Share of land USGS rates moderate or high potential
Tests reported
7
Too few for a share
- Burnet
- 7
- Needed
- 30
2008 to 2017, laboratory
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 Burnet 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
Burnet County, At a glance
Burnet County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 71% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Burnet County, 2008 to 2017, laboratory
CDC holds 7 reported tests for Burnet County over the 2008 to 2017 laboratory totals, with a median of 27.4 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Burnet County beside the counties around it is how this page reads it.
What these figures count
Only 7 tests were reported to CDC for Burnet 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).
Burnet County, Compared
Burnet County radon figures, compared
Calculated by Radon411CDC's largest figure for Burnet County rests on 7 tests over the 2008 to 2017 laboratory totals, 5 of them at or above 4 pCi/L, so each test moves its share by 14.3 points and no rank or comparison is drawn from it. Results reached as high as 102.5 pCi/L, with a middle value of 27.4 pCi/L.
Of the counties bordering it, 3 have a figure over the 2007 to 2016 laboratory totals: Bell County reported the largest share at or above 4 pCi/L, 14.3%, and Williamson County the smallest, 2.0%, with Travis County at 9.3% between. Farther out, McLennan County (78 miles away) at 17.1%, Bexar County (94 miles away) at 6.6% and Brazos County (112 miles away) at 0.0% have figures too. 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 Burnet County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 71% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Burnet County, Geology
The ground under Burnet County
PredictedUSGS's geologic map splits Burnet County: 71.3% of its land is low radon potential and 28.7% moderate. The map puts 62.3% of Burnet County in the area it calls Central Texas/Gulf Coast Plain and 28.7% in Llano Uplift, with one smaller area beside them. USGS gives the first a radon index of 7, in the low band (5 to 8), and the second 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Texas/Gulf Coast Plain | Cretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite. | Low | 7 | 62.3% |
| Llano Uplift | Precambrian metamorphic and undifferentiated igneous rocks. | Moderate | 10 | 28.7% |
| Southern High Plains and Plateaus | Paleozoic and Mesozoic sandstone, limestone, shale. | Low | 7 | 9.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Burnet County beside the ground around it
Across Texas 0.5% of the land is rated high; none of Burnet County's is. Of the 7 counties that border it, 3 have more moderate-potential ground, Llano County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Burnet County, Local resources
Radon testing and mitigation in Burnet 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
Burnet County, Questions
Questions about radon in Burnet County
Are radon levels high in Burnet County?
Over the 2008 to 2017 laboratory totals, 71.4% of the radon tests reported to CDC for Burnet County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 27.4 pCi/L. Of the counties bordering it, 3 have a figure over the 2007 to 2016 laboratory totals: Bell County reported the largest share at or above 4 pCi/L, 14.3%, and Williamson County the smallest, 2.0%, with Travis County at 9.3% between.
Which counties border Burnet County?
Burnet County borders 7 counties: Llano County, Williamson County, Blanco County, Travis County, Lampasas County, Bell County and San Saba County.
Products
Burnet County, Products
Testing a home in Burnet County
No CDC figure names Burnet County; the nearest county with one, Williamson County (36 miles away), reported 2.0% 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 Burnet 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
MonitorAEGTEST
HOUND-1011 rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Burnet County, Bordering counties
Counties bordering Burnet County
Calculated by Radon411- Radon levels in Bell CountyEPA zone 3
14.3%at or above 4 pCi/L
Median 1.1 pCi/L · 35 tests
- Radon levels in Travis CountyEPA zone 3
9.3%at or above 4 pCi/L
Median 0.8 pCi/L · 408 tests
- Radon levels in Williamson CountyEPA zone 3
2.0%at or above 4 pCi/L
Median 0.7 pCi/L · 98 tests
- Radon levels in Llano CountyEPA zone 2
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 6 tests
- Radon levels in Blanco CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.2 pCi/L · 2 tests
- Radon levels in Lampasas CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in San Saba CountyEPA zone 3
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Burnet County, Cities and towns
Cities and towns in Burnet County
Burnet County is growing: the Census Bureau puts it at 57,015 residents on July 1, 2025, up 15.2% from 49,480 in 2020. That works out to 57 people per square mile of land. No town dominates: Marble Falls, the largest, has 9,633 residents, 16.9% of the total. CDC's 7 reported tests for 2008 to 2017 work out to 0.1 per 1,000 residents (2025 estimate), close to Texas' 0.1.
From Marble Falls to Highland Haven, CDC publishes no figure by town: each reads Burnet County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Marble Falls | 9,633 | +36.1% | 16.9% |
| Burnet | 6,939 | +7.3% | 12.2% |
| Granite Shoals | 5,498 | +6.7% | 9.6% |
| Horseshoe Bayextends beyond Burnet County | 5,339 | +24.6% | Counted whole |
| Bertram | 2,142 | +30.1% | 3.8% |
| Meadowlakes | 1,831 | −3.1% | 3.2% |
| Cottonwood Shores | 1,701 | +19.1% | 3.0% |
| Highland Haven | 407 | −2.9% | 0.7% |
8 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 Burnet County is counted whole, so it has no share.
Burnet County, Homes
Homes in Burnet County
Of Burnet County's 24,577 homes, 72% are detached houses, against 65% across Texas; 18% are mobile homes. Half of its homes were built before 1995, close to Texas' 1990: 7% date from before 1960 and 41% from 2000 or later. Owners live in 77% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.
| Homes | Burnet County | Texas |
|---|---|---|
| Housing units | 24,577 | 11,890,808 |
| Detached houses | 72% | 65% |
| In buildings of 5 or more | 5% | 21% |
| Mobile homes | 18% | 7% |
| Built before 1960 | 7% | 13% |
| Built since 2000 | 41% | 37% |
| Middle year built | 1995 | 1990 |
| Owner-occupied | 77% | 63% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.