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Radon Levels in Hood County, Texas

EPA puts Hood County in Zone 3, its lowest radon zone, and only 5 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

How to test this homeFind a certified tester

  • Nearest county

    10.6%

    Tarrant County, 39 miles

    Tarrant
    10.6%
    Texas
    10.4%

    Share at 4+ pCi/L, 312 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Hood
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    6

    Too few for a share

    Hood
    6
    Needed
    30

    2006 to 2015, laboratory

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

Read a result for Hood County

Starts at EPA's action level

4.0pCi/L

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

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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.

Interpret this readingWhat a fix costs

The data

Hood County, At a glance

Hood County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Hood County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Hood County, 2008 to 2017, laboratory

CDC holds 5 reported tests for Hood County over the 2008 to 2017 laboratory totals, with a median of 0.7 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Hood County beside the counties around it is how this page reads it.

What these figures count

Only 5 tests were reported to CDC for Hood 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).

How to read these figures

Hood County, Compared

Hood County radon figures, compared

Calculated by Radon411

CDC's largest figure for Hood County rests on 6 tests over the 2006 to 2015 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 16.7 points and no rank or comparison is drawn from it. Results reached as high as 1.8 pCi/L, with a middle value of 0.8 pCi/L.

The nearest counties with a figure are Tarrant County (39 miles away) at 10.6%, Dallas County (66 miles away) at 8.7% and Denton County (68 miles away) at 7.2%. 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 Hood 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.

Texas, the United States and the counties around Hood County, 2007 to 2016, laboratory
AreaTestsAt or above 4 pCi/LMedian
Texas, pooled140 counties, pooled4,54810.4%Not pooled
United States, pooled2,666 counties, pooled1,939,02535.8%Not pooled
Randall Countyhighest in the state8471.4%6.2 pCi/L
Nueces Countylowest in the state450.0%0.6 pCi/L
Parker County, TXborders it2010.0%1.0 pCi/L
Johnson County, TXborders it140.0%0.8 pCi/L
The nearest Texas counties to Hood County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Tarrant County39 mi31210.6%0.9 pCi/L
Dallas County66 mi6998.7%1.0 pCi/L
Denton County68 mi1817.2%0.9 pCi/L
McLennan County71 mi4117.1%1.0 pCi/L
Collin County90 mi2847.7%1.0 pCi/L
Bell County98 mi3514.3%1.1 pCi/L
Williamson County124 mi982.0%0.7 pCi/L
Travis County144 mi4089.3%0.8 pCi/L
Hood County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 201750.0%0.7 pCi/L0.9 pCi/L10.2%Level
2007 to 201650.0%0.7 pCi/L0.9 pCi/L10.4%Level
2006 to 201560.0%0.8 pCi/L1.8 pCi/L11.0%Level
2005 to 201460.0%0.8 pCi/L1.8 pCi/L10.6%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Hood County, Geology

The ground under Hood County

Predicted

USGS's geologic map puts all of Hood County's mapped land in one class: low radon potential. All of it lies in the area the map calls Central Texas/Gulf Coast Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Hood County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Central Texas/Gulf Coast PlainCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low7100%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Hood County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Hood County's is. Of the 5 counties that border it, 1 has more moderate-potential ground, Johnson County the most at 54.0%.

Share of land by USGS radon potential: Hood County, the 5 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Hood CountyZone 3100%NoneNone
Somervell CountyZone 3100%NoneNone
Parker CountyZone 3100%NoneNone
Johnson CountyZone 346.0%54.0%None
Erath CountyZone 3100%NoneNone
Palo Pinto CountyZone 3100%NoneNone
Texas254 counties, pooled by land areaVaries72.4%26.8%0.5%

The map rates the ground, not the air in any home.

Local help

Hood County, Local resources

Radon testing and mitigation in Hood County

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

Hood County, Questions

Questions about radon in Hood County

Are radon levels high in Hood County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Hood County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.7 pCi/L. Of the 8 nearest counties with a figure, within 144 miles, the share of tests at or above 4 pCi/L runs from 2.0% to 17.1%.

Which counties border Hood County?

Hood County borders 5 counties: Somervell County, Parker County, Johnson County, Erath County and Palo Pinto County.

Products

Hood County, Products

Testing a home in Hood County

No CDC figure names Hood County; the nearest county with one, Tarrant County (39 miles away), reported 10.6% 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 Hood County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Hood County homes, compared

Explore

Hood County, Bordering counties

Counties bordering Hood County

Calculated by Radon411

Hood County, Cities and towns

Cities and towns in Hood County

Hood County is growing: the Census Bureau puts it at 70,501 residents on July 1, 2025, up 13.6% from 62,054 in 2020. That works out to 168 people per square mile of land. No town dominates: Granbury, the largest, has 13,263 residents, 18.8% of the total. Reported testing is thin here: 6 tests over 2006 to 2015, or 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.

From Granbury to Stockton Bend, CDC publishes no figure by town: each reads Hood County's.

The cities and towns in Hood County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Granbury13,263+20.0%18.8%
DeCordova3,296+8.9%4.7%
Cressonextends beyond Hood County2,126+47.5%Counted whole
Tolar1,472+53.7%2.1%
Lipan554+9.5%0.8%
Stockton Bend419+9.1%0.6%

6 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 Hood County is counted whole, so it has no share.

Hood County, Homes

Homes in Hood County

Of Hood County's 28,796 homes, 72% are detached houses, against 65% across Texas; 17% are mobile homes. Half of its homes were built before 1997, close to Texas' 1990: 4% date from before 1960 and 45% from 2000 or later. Owners live in 81% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.

Homes in Hood County, Texas, 2019 to 2023
HomesHood CountyTexas
Housing units28,79611,890,808
Detached houses72%65%
In buildings of 5 or more7%21%
Mobile homes17%7%
Built before 19604%13%
Built since 200045%37%
Middle year built19971990
Owner-occupied81%63%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.