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Radon Levels in Kleberg County, Texas

EPA puts Kleberg County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2006 to 2015, 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

  • Highest bordering

    0.0%

    Nueces County

    Nueces
    0.0%

    1 of 4 neighbours have 30+ tests, 2007 to 2016

  • Nearest county

    0.0%

    Nueces County, 21 miles

    Nueces
    0.0%
    Texas
    10.4%

    Share at 4+ pCi/L, 45 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Kleberg
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    1

    Too few for a share

    Kleberg
    1
    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 Kleberg 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

Kleberg County, At a glance

Kleberg County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Kleberg 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 95% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Kleberg County, 2006 to 2015, laboratory

CDC holds 1 reported test for Kleberg County over the 2006 to 2015 laboratory totals, a result of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Kleberg County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Kleberg County over 2006 to 2015 (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: 2006 to 2015, laboratory. Measured data period: 2005 to 2015 (every CDC figure on file).

How to read these figures

Kleberg County, Compared

Kleberg County radon figures, compared

Calculated by Radon411

CDC's largest figure for Kleberg County rests on 1 test over the 2006 to 2015 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 100.0 points and no rank or comparison is drawn from it. Results reached as high as 0.1 pCi/L, with a middle value of 0.1 pCi/L.

Nueces County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L. Farther out, Bexar County (147 miles away) at 6.6%, Brazoria County (184 miles away) at 6.3% and Fort Bend County (187 miles away) at 3.4% 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 Kleberg County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 95% of the county's land low radon potential.

Texas, the United States and the counties around Kleberg 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
Brazos Countylowest in the state490.0%0.2 pCi/L
Nueces County, TXborders it450.0%0.6 pCi/L
Jim Wells County, TXborders it10.0%0.1 pCi/L
The nearest Texas counties to Kleberg County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Nueces County21 mi450.0%0.6 pCi/L
Bexar County147 mi1976.6%0.6 pCi/L
Brazoria County184 mi326.3%0.3 pCi/L
Fort Bend County187 mi1173.4%0.2 pCi/L
Travis County200 mi4089.3%0.8 pCi/L
Galveston County216 mi830.0%0.2 pCi/L
Harris County219 mi7753.1%0.2 pCi/L
Williamson County222 mi982.0%0.7 pCi/L
Kleberg County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2006 to 201510.0%0.1 pCi/L0.1 pCi/L11.0%Level
2005 to 201410.0%0.1 pCi/L0.1 pCi/L10.6%First on file

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

Kleberg County, Geology

The ground under Kleberg County

Predicted

USGS's geologic map puts all of Kleberg County's mapped land in one class: low radon potential. The map puts 67.4% of Kleberg County in the area it calls South Texas Plain and 27.1% in Coastal Plain. USGS gives both a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Kleberg County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
South Texas PlainCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low767.4%
Coastal PlainCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low727.1%

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

Kleberg County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Kleberg County's is. None of the 4 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Kleberg County, the 4 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Kleberg CountyZone 394.5%NoneNone
Nueces CountyZone 393.2%NoneNone
Jim Wells CountyZone 3100%NoneNone
Kenedy CountyZone 388.8%NoneNone
Brooks 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

Kleberg County, Local resources

Radon testing and mitigation in Kleberg 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

Kleberg County, Questions

Questions about radon in Kleberg County

Are radon levels high in Kleberg County?

Over the 2006 to 2015 laboratory totals, 0.0% of the radon tests reported to CDC for Kleberg County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Nueces County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 0.0% of its tests at or above 4 pCi/L.

Which counties border Kleberg County?

Kleberg County borders 4 counties: Nueces County, Jim Wells County, Kenedy County and Brooks County.

Products

Kleberg County, Products

Testing a home in Kleberg County

No CDC figure names Kleberg County; the nearest county with one, Nueces County (21 miles away), reported 0.0% 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 Kleberg County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Kleberg County homes, compared

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Kleberg County, Bordering counties

Counties bordering Kleberg County

Calculated by Radon411

Kleberg County, Cities and towns

Cities and towns in Kleberg County

About 30,315 people live in Kleberg County by the Census Bureau's estimate for July 1, 2025, 671 fewer than in 2020 (−2.2%). That works out to 34 people per square mile of land. Corpus Christi, the largest place on its list (317,247 residents in all), extends beyond Kleberg County, so no share of the total is worked out for it. Reported testing is thin here: 1 test over 2006 to 2015, or under 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.

From Corpus Christi to Kingsville, CDC publishes no figure by town: each reads Kleberg County's.

The cities and towns in Kleberg County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Corpus Christiextends beyond Kleberg County317,247−0.3%Counted whole
Kingsville24,687−2.3%81.4%

2 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 Kleberg County is counted whole, so it has no share.

Kleberg County, Homes

Homes in Kleberg County

Of Kleberg County's 13,984 homes, 65% are detached houses, against 65% across Texas; 18% are in buildings of five or more homes. The homes are older than Texas' as a whole: half were built before 1979 (1990 for Texas), and 22% date from before 1960. 54% 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 in Kleberg County, Texas, 2019 to 2023
HomesKleberg CountyTexas
Housing units13,98411,890,808
Detached houses65%65%
In buildings of 5 or more18%21%
Mobile homes8%7%
Built before 196022%13%
Built since 200028%37%
Middle year built19791990
Owner-occupied54%63%

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