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Radon Levels in Kenedy County, Texas

EPA puts Kenedy 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

How to test this homeFind a certified tester

  • Nearest county

    0.0%

    Nueces County, 55 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

    Kenedy
    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. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

Read a result for Kenedy 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

Kenedy County, At a glance

Kenedy County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Kenedy 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 89% 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 Kenedy County. Nueces County, 55 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.

How to read these figures

Kenedy County, Compared

Kenedy County radon figures, compared

Calculated by Radon411

Kenedy County has no radon test figure of its own from CDC, whose counts over the 2007 to 2016 laboratory totals name 140 other Texas counties and leave it out. 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 Nueces County (55 miles away) at 0.0%, Bexar County (181 miles away) at 6.6% and Brazoria County (208 miles away) at 6.3%. 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 Kenedy County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 89% of the county's land low radon potential.

Texas, the United States and the counties around Kenedy 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
Hidalgo County, TXborders it150.0%0.8 pCi/L
The nearest Texas counties to Kenedy County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Nueces County55 mi450.0%0.6 pCi/L
Bexar County181 mi1976.6%0.6 pCi/L
Brazoria County208 mi326.3%0.3 pCi/L
Fort Bend County214 mi1173.4%0.2 pCi/L
Travis County235 mi4089.3%0.8 pCi/L
Galveston County238 mi830.0%0.2 pCi/L
Harris County246 mi7753.1%0.2 pCi/L
Williamson County256 mi982.0%0.7 pCi/L

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

Kenedy County, Geology

The ground under Kenedy County

Predicted

USGS's geologic map puts all of Kenedy County's mapped land in one class: low radon potential. 88.8% of it lies in the area the map calls South Texas Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Kenedy County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
South Texas PlainCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low788.8%

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

Kenedy County beside the ground around it

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

Share of land by USGS radon potential: Kenedy County, the 4 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Kenedy CountyZone 388.8%NoneNone
Brooks CountyZone 3100%NoneNone
Willacy CountyZone 392.8%NoneNone
Kleberg CountyZone 394.5%NoneNone
Hidalgo CountyZone 399.8%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

Kenedy County, Local resources

Radon testing and mitigation in Kenedy 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

Kenedy County, Questions

Questions about radon in Kenedy County

Are radon levels high in Kenedy County?

No CDC testing statistics are published here for Kenedy County, Texas yet. Of the 8 nearest counties with a figure, within 256 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 9.3%.

Which counties border Kenedy County?

Kenedy County borders 4 counties: Brooks County, Willacy County, Kleberg County and Hidalgo County.

Products

Kenedy County, Products

Testing a home in Kenedy County

No CDC figure names Kenedy County; the nearest county with one, Nueces County (55 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 Kenedy County.

Test kits and monitors3

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Best radon monitors for Kenedy County homes, compared

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Kenedy County, Bordering counties

Counties bordering Kenedy County

Calculated by Radon411

Kenedy County, Residents

Who lives in Kenedy County

Kenedy County has been losing residents: from 349 in 2020 to 319 on July 1, 2025, a fall of 8.6% by the Census Bureau's estimates. Spread over its land, that is 0.2 people to the square mile. CDC publishes no radon test count for Kenedy County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).

Census lists no incorporated place in Kenedy County: every home in it reads the county's figures.

Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).