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Radon Levels in Refugio County, Texas

EPA puts Refugio County in Zone 3, its lowest radon zone, and only 1 radon test from it is 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

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  • Nearest county

    0.0%

    Nueces County, 50 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

    Refugio
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    1

    Too few for a share

    Refugio
    1
    Needed
    30

    2008 to 2017, 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 Refugio 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

Refugio County, At a glance

Refugio County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Refugio 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 Refugio County, 2008 to 2017, laboratory

CDC holds 1 reported test for Refugio County over the 2008 to 2017 laboratory totals, a result of 1.2 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Refugio County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Refugio 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

Refugio County, Compared

Refugio County radon figures, compared

Calculated by Radon411

CDC's largest figure for Refugio County rests on 1 test over the 2008 to 2017 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 1.2 pCi/L, with a middle value of 1.2 pCi/L.

The nearest counties with a figure are Nueces County (50 miles away) at 0.0%, Bexar County (113 miles away) at 6.6% and Fort Bend County (118 miles away) at 3.4%. 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 Refugio 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 Refugio 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
Goliad County, TXborders it60.0%0.6 pCi/L
Aransas County, TXborders it20.0%0.1 pCi/L
San Patricio County, TXborders it10.0%0.2 pCi/L
Victoria County, TXborders it50.0%0.6 pCi/L
The nearest Texas counties to Refugio County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Nueces County50 mi450.0%0.6 pCi/L
Bexar County113 mi1976.6%0.6 pCi/L
Fort Bend County118 mi1173.4%0.2 pCi/L
Brazoria County120 mi326.3%0.3 pCi/L
Travis County143 mi4089.3%0.8 pCi/L
Harris County150 mi7753.1%0.2 pCi/L
Galveston County152 mi830.0%0.2 pCi/L
Williamson County162 mi982.0%0.7 pCi/L
Refugio County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 201710.0%1.2 pCi/L1.2 pCi/L10.2%Level
2007 to 201610.0%1.2 pCi/L1.2 pCi/L10.4%Level
2006 to 201510.0%1.2 pCi/L1.2 pCi/L11.0%Level
2005 to 201410.0%1.2 pCi/L1.2 pCi/L10.6%First on file

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

Refugio County, Geology

The ground under Refugio County

Predicted

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

USGS's geologic areas under Refugio County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Coastal 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.

Refugio County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Refugio County's is. None of the 6 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Refugio County, the 6 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Refugio CountyZone 3100%NoneNone
Aransas CountyZone 376.8%NoneNone
San Patricio CountyZone 399.7%NoneNone
Goliad CountyZone 3100%NoneNone
Bee CountyZone 3100%NoneNone
Calhoun CountyZone 375.2%NoneNone
Victoria 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

Refugio County, Local resources

Radon testing and mitigation in Refugio 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

Refugio County, Questions

Questions about radon in Refugio County

Are radon levels high in Refugio County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Refugio County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.2 pCi/L. Of the 8 nearest counties with a figure, within 162 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 9.3%.

Which counties border Refugio County?

Refugio County borders 6 counties: Aransas County, San Patricio County, Goliad County, Bee County, Calhoun County and Victoria County.

Products

Refugio County, Products

Testing a home in Refugio County

No CDC figure names Refugio County; the nearest county with one, Nueces County (50 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 Refugio County.

Test kits and monitors3

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Best radon monitors for Refugio County homes, compared

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Refugio County, Bordering counties

Counties bordering Refugio County

Calculated by Radon411

Refugio County, Cities and towns

Cities and towns in Refugio County

About 6,657 people live in Refugio County by the Census Bureau's estimate for July 1, 2025, 85 fewer than in 2020 (−1.3%). Spread over its land, that is 8.6 people to the square mile. Its largest town, Refugio, has 2,752 residents, 41.3% of the total. Together its 4 incorporated places hold 66.4% of those residents; the other 33.6% live outside any of them. CDC's 1 reported test for 2008 to 2017 work out to 0.2 per 1,000 residents (2025 estimate), close to Texas' 0.1.

From Refugio to Austwell, CDC publishes no figure by town: each reads Refugio County's.

The cities and towns in Refugio County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Refugio2,752+1.1%41.3%
Woodsboro1,277−3.6%19.2%
Bayside279−0.4%4.2%
Austwell114−2.6%1.7%

4 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).

Refugio County, Homes

Homes in Refugio County

Refugio County is a place of houses on their own lots: 83% of its 3,328 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1971 (1990 for Texas), and 31% date from before 1960. Owners live in 78% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.

Homes in Refugio County, Texas, 2019 to 2023
HomesRefugio CountyTexas
Housing units3,32811,890,808
Detached houses83%65%
In buildings of 5 or more4%21%
Mobile homes12%7%
Built before 196031%13%
Built since 200019%37%
Middle year built19711990
Owner-occupied78%63%

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