Skip to content
RADON411

Locations and reports

Radon Levels in Freestone County, Texas

EPA puts Freestone County in Zone 3, its lowest radon zone, and only 10 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

    17.1%

    McLennan County, 63 miles

    McLennan
    17.1%
    Texas
    10.4%

    Share at 4+ pCi/L, 41 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Freestone
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    10

    Too few for a share

    Freestone
    10
    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 Freestone 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

Freestone County, At a glance

Freestone County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

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

CDC holds 10 reported tests for Freestone County over the 2008 to 2017 laboratory totals, with a median of 0.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Freestone County beside the counties around it is how this page reads it.

What these figures count

Only 10 tests were reported to CDC for Freestone 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

Freestone County, Compared

Freestone County radon figures, compared

Calculated by Radon411

CDC's largest figure for Freestone County rests on 10 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 10.0 points and no rank or comparison is drawn from it. Results reached as high as 3.5 pCi/L, with a middle value of 0.9 pCi/L.

The nearest counties with a figure are McLennan County (63 miles away) at 17.1%, Smith County (69 miles away) at 9.1% and Brazos County (73 miles away) at 0.0%. 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 Freestone 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 Freestone 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
Limestone County, TXborders it20.0%0.1 pCi/L
Navarro County, TXborders it60.0%0.8 pCi/L
Henderson County, TXborders it10.0%0.8 pCi/L
The nearest Texas counties to Freestone County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
McLennan County63 mi4117.1%1.0 pCi/L
Smith County69 mi339.1%0.8 pCi/L
Brazos County73 mi490.0%0.2 pCi/L
Dallas County82 mi6998.7%1.0 pCi/L
Bell County91 mi3514.3%1.1 pCi/L
Tarrant County99 mi31210.6%0.9 pCi/L
Montgomery County104 mi857.1%0.6 pCi/L
Collin County105 mi2847.7%1.0 pCi/L
Freestone County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 2017100.0%0.9 pCi/L3.5 pCi/L10.2%Level
2007 to 2016100.0%0.9 pCi/L3.5 pCi/L10.4%Level
2006 to 2015100.0%0.9 pCi/L3.5 pCi/L11.0%Level
2005 to 2014100.0%0.9 pCi/L3.5 pCi/L10.6%First on file

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

Freestone County, Geology

The ground under Freestone County

Predicted

USGS's geologic map puts all of Freestone 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 Freestone 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.

Freestone County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Freestone County's is. None of the 5 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Freestone County, the 5 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Freestone CountyZone 3100%NoneNone
Limestone CountyZone 3100%NoneNone
Navarro CountyZone 3100%NoneNone
Anderson CountyZone 3100%NoneNone
Leon CountyZone 3100%NoneNone
Henderson 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

Freestone County, Local resources

Radon testing and mitigation in Freestone 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

Freestone County, Questions

Questions about radon in Freestone County

Are radon levels high in Freestone County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Freestone County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.9 pCi/L. Of the 8 nearest counties with a figure, within 105 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 17.1%.

Which counties border Freestone County?

Freestone County borders 5 counties: Limestone County, Navarro County, Anderson County, Leon County and Henderson County.

Products

Freestone County, Products

Testing a home in Freestone County

No CDC figure names Freestone County; the nearest county with one, McLennan County (63 miles away), reported 17.1% 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 Freestone County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Freestone County homes, compared

Explore

Freestone County, Bordering counties

Counties bordering Freestone County

Calculated by Radon411

Freestone County, Cities and towns

Cities and towns in Freestone County

Freestone County is growing: the Census Bureau puts it at 20,811 residents on July 1, 2025, up 7.1% from 19,439 in 2020. That works out to 24 people per square mile of land. No town dominates: Teague, the largest, has 3,595 residents, 17.3% of the total. Testing is reported here more often than across the state: CDC's 10 reported tests for 2008 to 2017 come to 0.5 for every 1,000 residents (2025 estimate), against 0.1 for Texas.

From Teague to Kirvin, CDC publishes no figure by town: each reads Freestone County's.

The cities and towns in Freestone County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Teague3,595+6.2%17.3%
Fairfield3,029+5.9%14.6%
Wortham1,041+5.6%5.0%
Oakwoodextends beyond Freestone County405+4.7%Counted whole
Streetmanextends beyond Freestone County275+10.9%Counted whole
Kirvin113+8.7%0.5%

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 Freestone County is counted whole, so it has no share.

Freestone County, Homes

Homes in Freestone County

Of Freestone County's 9,101 homes, 69% are detached houses, against 65% across Texas; 26% are mobile homes. Half of its homes were built before 1988, close to Texas' 1990: 15% date from before 1960 and 31% from 2000 or later. 75% 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 Freestone County, Texas, 2019 to 2023
HomesFreestone CountyTexas
Housing units9,10111,890,808
Detached houses69%65%
In buildings of 5 or more2%21%
Mobile homes26%7%
Built before 196015%13%
Built since 200031%37%
Middle year built19881990
Owner-occupied75%63%

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