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Radon Levels in Van Zandt County, Texas

EPA puts Van Zandt 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

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  • Highest bordering

    9.1%

    Smith County

    Smith
    9.1%

    1 of 6 neighbours have 30+ tests, 2007 to 2016

  • Nearest county

    9.1%

    Smith County, 36 miles

    Smith
    9.1%
    Texas
    10.4%

    Share at 4+ pCi/L, 33 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Van Zandt
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    6

    Too few for a share

    Van Zandt
    6
    Needed
    30

    2007 to 2016, 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 Van Zandt 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

Van Zandt County, At a glance

Van Zandt County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

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

CDC holds 5 reported tests for Van Zandt County over the 2008 to 2017 laboratory totals, with a median of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Van Zandt County beside the counties around it is how this page reads it.

What these figures count

Only 5 tests were reported to CDC for Van Zandt 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

Van Zandt County, Compared

Van Zandt County radon figures, compared

Calculated by Radon411

CDC's largest figure for Van Zandt County rests on 6 tests over the 2007 to 2016 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 1.9 pCi/L, with a middle value of 0.1 pCi/L.

Smith County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 9.1% of its tests at or above 4 pCi/L. Farther out, Dallas County (57 miles away) at 8.7%, Collin County (61 miles away) at 7.7% and Tarrant County (86 miles away) at 10.6% 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 Van Zandt 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 Van Zandt 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
Hunt County, TXborders it425.0%2.0 pCi/L
Smith County, TXborders it339.1%0.8 pCi/L
Kaufman County, TXborders it40.0%0.3 pCi/L
Henderson County, TXborders it10.0%0.8 pCi/L
The nearest Texas counties to Van Zandt County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Smith County36 mi339.1%0.8 pCi/L
Dallas County57 mi6998.7%1.0 pCi/L
Collin County61 mi2847.7%1.0 pCi/L
Tarrant County86 mi31210.6%0.9 pCi/L
Denton County87 mi1817.2%0.9 pCi/L
McLennan County106 mi4117.1%1.0 pCi/L
Brazos County134 mi490.0%0.2 pCi/L
Bell County143 mi3514.3%1.1 pCi/L
Van Zandt County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 201750.0%0.1 pCi/L1.9 pCi/L10.2%Level
2007 to 201660.0%0.1 pCi/L1.9 pCi/L10.4%Level
2006 to 201560.0%0.1 pCi/L1.9 pCi/L11.0%Level
2005 to 201460.0%0.1 pCi/L1.9 pCi/L10.6%First on file

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

Van Zandt County, Geology

The ground under Van Zandt County

Predicted

USGS's geologic map puts all of Van Zandt County's mapped land in one class: low radon potential. All of it lies in the area the map calls East Texas Province, to which USGS gives a radon index of 6, in the low band (5 to 8).

USGS's geologic areas under Van Zandt County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
East Texas ProvinceCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low6100%

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

Van Zandt County beside the ground around it

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

Share of land by USGS radon potential: Van Zandt County, the 6 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Van Zandt CountyZone 3100%NoneNone
Rains CountyZone 3100%NoneNone
Henderson CountyZone 3100%NoneNone
Kaufman CountyZone 3100%NoneNone
Wood CountyZone 3100%NoneNone
Smith CountyZone 3100%NoneNone
Hunt 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

Van Zandt County, Local resources

Radon testing and mitigation in Van Zandt 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

Van Zandt County, Questions

Questions about radon in Van Zandt County

Are radon levels high in Van Zandt County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Van Zandt County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Smith County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 9.1% of its tests at or above 4 pCi/L.

Which counties border Van Zandt County?

Van Zandt County borders 6 counties: Rains County, Henderson County, Kaufman County, Wood County, Smith County and Hunt County.

Products

Van Zandt County, Products

Testing a home in Van Zandt County

No CDC figure names Van Zandt County; the nearest county with one, Smith County (36 miles away), reported 9.1% 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 Van Zandt County.

Test kits and monitors3

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Best radon monitors for Van Zandt County homes, compared

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Van Zandt County, Bordering counties

Counties bordering Van Zandt County

Calculated by Radon411

Van Zandt County, Cities and towns

Cities and towns in Van Zandt County

Van Zandt County is growing: the Census Bureau puts it at 66,130 residents on July 1, 2025, up 10.7% from 59,747 in 2020. That works out to 78 people per square mile of land. No town dominates: Canton, the largest, has 5,070 residents, 7.7% of the total. Together its 7 incorporated places hold 27.3% of those residents; the other 72.7% live outside any of them. Reported testing is thin here: 6 tests over 2007 to 2016, or 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.

From Canton to Edom, CDC publishes no figure by town: each reads Van Zandt County's.

The cities and towns in Van Zandt County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Canton5,070+19.0%7.7%
Wills Point4,033+8.0%6.1%
Grand Saline3,319+6.8%5.0%
Van2,993+11.9%4.5%
Edgewood1,763+9.6%2.7%
Fruitvale518+8.4%0.8%
Edom372+8.8%0.6%

7 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).

Van Zandt County, Homes

Homes in Van Zandt County

Of Van Zandt County's 25,708 homes, 73% are detached houses, against 65% across Texas; 22% are mobile homes. Half of its homes were built before 1991, close to Texas' 1990: 11% date from before 1960 and 34% 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 Van Zandt County, Texas, 2019 to 2023
HomesVan Zandt CountyTexas
Housing units25,70811,890,808
Detached houses73%65%
In buildings of 5 or more1%21%
Mobile homes22%7%
Built before 196011%13%
Built since 200034%37%
Middle year built19911990
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.