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Radon Levels in Nacogdoches County, Texas

EPA puts Nacogdoches County in Zone 3, its lowest radon zone, and only 6 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

    9.1%

    Smith County, 65 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

    Nacogdoches
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    6

    Too few for a share

    Nacogdoches
    6
    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 Nacogdoches 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

Nacogdoches County, At a glance

Nacogdoches County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

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

CDC holds 6 reported tests for Nacogdoches County over the 2008 to 2017 laboratory totals, with a median of 1.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Nacogdoches County beside the counties around it is how this page reads it.

What these figures count

Only 6 tests were reported to CDC for Nacogdoches 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

Nacogdoches County, Compared

Nacogdoches County radon figures, compared

Calculated by Radon411

CDC's largest figure for Nacogdoches County rests on 6 tests over the 2008 to 2017 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 1.1 pCi/L, with a middle value of 1.0 pCi/L.

The nearest counties with a figure are Smith County (65 miles away) at 9.1%, Montgomery County (105 miles away) at 7.1% and Brazos County (120 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 Nacogdoches 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 Nacogdoches 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
Rusk County, TXborders it20.0%0.4 pCi/L
Angelina County, TXborders it30.0%0.1 pCi/L
Cherokee County, TXborders it10.0%0.1 pCi/L
The nearest Texas counties to Nacogdoches County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Smith County65 mi339.1%0.8 pCi/L
Montgomery County105 mi857.1%0.6 pCi/L
Brazos County120 mi490.0%0.2 pCi/L
Harris County130 mi7753.1%0.2 pCi/L
Dallas County149 mi6998.7%1.0 pCi/L
McLennan County153 mi4117.1%1.0 pCi/L
Galveston County155 mi830.0%0.2 pCi/L
Collin County158 mi2847.7%1.0 pCi/L
Nacogdoches County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 201760.0%1.0 pCi/L1.1 pCi/L10.2%Level
2007 to 201660.0%1.0 pCi/L1.1 pCi/L10.4%Level
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.

Nacogdoches County, Geology

The ground under Nacogdoches County

Predicted

USGS's geologic map puts all of Nacogdoches 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 Nacogdoches 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.

Nacogdoches County beside the ground around it

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

Share of land by USGS radon potential: Nacogdoches County, the 5 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Nacogdoches CountyZone 3100%NoneNone
Angelina CountyZone 3100%NoneNone
San Augustine CountyZone 3100%NoneNone
Shelby CountyZone 3100%NoneNone
Cherokee CountyZone 3100%NoneNone
Rusk 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

Nacogdoches County, Local resources

Radon testing and mitigation in Nacogdoches 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

Nacogdoches County, Questions

Questions about radon in Nacogdoches County

Are radon levels high in Nacogdoches County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Nacogdoches County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.0 pCi/L. Of the 8 nearest counties with a figure, within 158 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 17.1%.

Which counties border Nacogdoches County?

Nacogdoches County borders 5 counties: Angelina County, San Augustine County, Shelby County, Cherokee County and Rusk County.

Products

Nacogdoches County, Products

Testing a home in Nacogdoches County

No CDC figure names Nacogdoches County; the nearest county with one, Smith County (65 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 Nacogdoches County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Nacogdoches County homes, compared

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Nacogdoches County, Bordering counties

Counties bordering Nacogdoches County

Calculated by Radon411

Nacogdoches County, Cities and towns

Cities and towns in Nacogdoches County

The Census Bureau estimates 66,035 residents in Nacogdoches County for July 1, 2025, 1,393 more than in 2020 (+2.2%). That works out to 70 people per square mile of land. Its largest town, Nacogdoches, has 32,500 residents, 49.2% of the total. Together its 5 incorporated places hold 52.8% of those residents; the other 47.2% live outside any of them. Reported testing is thin here: 6 tests over 2008 to 2017, or 0.1 for every 1,000 residents (2025 estimate), where Texas as a whole comes to 0.1.

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

The cities and towns in Nacogdoches County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Nacogdoches32,500+1.4%49.2%
Garrison833+5.2%1.3%
Cushing584+4.5%0.9%
Appleby553+1.5%0.8%
Chireno378+1.9%0.6%

5 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).

Nacogdoches County, Homes

Homes in Nacogdoches County

Of Nacogdoches County's 28,995 homes, 57% are detached houses, against 65% across Texas; 19% are mobile homes. Half of its homes were built before 1985, close to Texas' 1990: 16% date from before 1960 and 25% from 2000 or later. 58% 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 Nacogdoches County, Texas, 2019 to 2023
HomesNacogdoches CountyTexas
Housing units28,99511,890,808
Detached houses57%65%
In buildings of 5 or more16%21%
Mobile homes19%7%
Built before 196016%13%
Built since 200025%37%
Middle year built19851990
Owner-occupied58%63%

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