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Radon Levels in Texas County, Missouri

EPA puts Texas County in Zone 2, its middle radon zone, and only 2 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Share at 4+ pCi/L

    19.3%

    11.3 pts below MO

    Texas
    19.3%
    Missouri
    30.6%

    57 tests, 2008 to 2017

  • Median result

    1.3pCi/L

    Below action level

    Texas
    1.3 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    57

    52nd of 72 by tests

    Texas
    57
    St. Louis
    17,747

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Missouri

    61 of 72

    Lowest quarter

    Texas
    19.3%
    Atchison
    69.9%

    By share, of 72 with 30+ tests

Read a result for Texas County

Starts at Texas County's median, 1.3 pCi/L

1.3pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 1.3 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Texas County's median reported result, 2008 to 2017.

Interpret this reading

The data

Texas County, At a glance

Texas County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Texas County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Texas County, 2023

Share of reported tests at or above 4 pCi/L, by year, Texas County
Share of reported tests at or above 4 pCi/L, by year, Texas County
YearShare of reported tests at or above 4 pCi/L
201428.6%
20150.0%
20160.0%
201750.0%
20200.0%
20210.0%
202225.0%
202350.0%

2023: 50.0%. Across these years the share ran from 0.0% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 2 tests were reported to CDC for Texas County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Texas County, Compared

Texas County radon figures, compared

Calculated by Radon411

Texas County's 57 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.3 pCi/L and a maximum of 15.7 pCi/L, and 19.3% reached 4 pCi/L. Missouri as a whole (115 Missouri counties, pooled) comes to 30.6%: 11.3 points higher than here.

The newest figure, in 2023, counts only 2 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 57-test figure.

Among its state's counties it ranks 61st of 72 Missouri counties with 30 or more tests for the same period. Statewide for the same period, Atchison County reported the highest share (69.9%) and Vernon County the lowest (8.8%).

Below the action level, 37 tests (64.9%) came in under 2 pCi/L, against 41.2% statewide, and 9 tests (15.8%) fell between 2 and 4, against 28.1% statewide. The busiest year on file was 2014, with 7 tests reported; the quietest, 2021, had 1.

EPA's 1993 zone map puts Texas County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.

Next door, the shares run from 14.7% in Phelps County to 45.7% in Howell County, with Pulaski County and Phelps County below Texas County.

Texas County against Missouri, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Texas County
Texas County5719.3%1.3 pCi/LThis county
Missouri, pooled115 counties, pooled58,52530.6%Not pooled+11.3 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+16.4 points
Atchison Countyhighest in the state10369.9%5.6 pCi/L+50.6 points
Vernon Countylowest in the state348.8%0.9 pCi/L−10.5 points
Howell County, MOborders it13845.7%3.5 pCi/L+26.4 points
Laclede County, MOborders it4637.0%2.3 pCi/L+17.7 points
Dent County, MOborders it1435.7%3.0 pCi/L+16.4 points
Wright County, MOborders it1827.8%2.7 pCi/L+8.5 points
Shannon County, MOborders it1926.3%1.3 pCi/L+7.0 points
Pulaski County, MOborders it10718.7%1.3 pCi/L−0.6 points
Phelps County, MOborders it20414.7%1.5 pCi/L−4.6 points
Douglas County, MOborders it30.0%1.2 pCi/L−19.3 points
Where Texas County's reported results fell, 2008 to 2017, laboratory, beside Missouri and the United States
ResultTexas County testsTexas County shareMissouri shareU.S. shareAgainst Missouri
Under 2 pCi/L3764.9%41.2%39.6%+23.7 points
2 to 4 pCi/L915.8%28.1%24.7%−12.3 points
4 pCi/L and above1119.3%30.6%35.7%−11.3 points
Texas County ranked among the 72 Missouri counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Boone County56 of 724,76721.7%1.9 pCi/L
Butler County57 of 723321.2%1.9 pCi/L
Morgan County58 of 7212321.1%2.2 pCi/L
Webster County59 of 7210320.4%1.6 pCi/L
Macon County60 of 723619.4%1.7 pCi/L
Texas County61 of 725719.3%1.3 pCi/L
Linn County62 of 723718.9%1.8 pCi/L
Pulaski County63 of 7210718.7%1.3 pCi/L
Randolph County64 of 725817.2%1.8 pCi/L
Miller County65 of 7215416.9%1.9 pCi/L
St. Louis city66 of 721,87316.9%1.9 pCi/L
Texas County radon tests by year, against Missouri's pooled share
YearTestsAt or above 4 pCi/LMedianHighestMissouri, pooledChange from the row before
2023250.0%3.7 pCi/L6.0 pCi/L35.7%+25.0 points
2022425.0%2.0 pCi/L14.9 pCi/L40.8%+25.0 points
202110.0%3.3 pCi/L3.3 pCi/L31.8%Level
202030.0%1.6 pCi/L2.9 pCi/L33.2%−50.0 points
2017450.0%4.9 pCi/L9.4 pCi/L37.0%+50.0 points
201610.0%0.2 pCi/L0.2 pCi/L29.8%Level
201510.0%2.5 pCi/L2.5 pCi/L27.6%−28.6 points
2014728.6%1.2 pCi/L5.9 pCi/L34.4%First on file

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

Texas County, Geology

The ground under Texas County

Predicted

USGS's geologic map puts all of Texas County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Salem Plateau, to which USGS gives a radon index of 11, in the moderate band (9 to 11).

USGS's geologic areas under Texas County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Salem PlateauOrdovician dolomite, sandstone, limestone, and shale.Moderate11100%

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

Texas County beside the ground around it

Across Missouri 8.2% of the land is rated high; none of Texas County's is. Of the 8 counties that border it, none has as large a share of moderate-potential ground; Dent County comes nearest at 100%.

Share of land by USGS radon potential: Texas County, the 8 counties bordering it and Missouri
AreaEPA zoneLow potentialModerate potentialHigh potential
Texas CountyZone 2None100%None
Wright CountyZone 2None100%None
Dent CountyZone 2None100%None
Pulaski CountyZone 2None100%None
Shannon CountyZone 2None100%None
Phelps CountyZone 2None100%None
Douglas CountyZone 2None100%None
Laclede CountyZone 2None100%None
Howell CountyZone 2None100%None
Missouri115 counties, pooled by land areaVaries5.8%86.0%8.2%

The map rates the ground, not the air in any home.

Local help

Texas County, Local resources

Radon testing and mitigation in Texas County

What Missouri's program says
Phone
573-751-6102
Email
radon@health.mo.gov

What it means

Texas County, Questions

Questions about radon in Texas County

Are radon levels high in Texas County?

In 2023, 50.0% of the radon tests reported to CDC for Texas County, Missouri were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.7 pCi/L. Of 72 Missouri counties with 30 or more tests for the same period, 60 reported a higher share; pooled, the state comes to 30.6%.

Which counties border Texas County?

Texas County borders 8 counties: Wright County, Dent County, Pulaski County, Shannon County, Phelps County, Douglas County, Laclede County and Howell County.

Products

Texas County, Products

Testing a home in Texas County

In Texas County, 19.3% of 57 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.6% pooled across Missouri. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Texas County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Texas County homes, compared

Explore

Texas County, Bordering counties

Counties bordering Texas County

Calculated by Radon411

Texas County, Cities and towns

Cities and towns in Texas County

Texas County is growing: the Census Bureau puts it at 25,994 residents on July 1, 2025, up 6.9% from 24,324 in 2020. That works out to 22 people per square mile of land. Mountain Grove, the largest place on its list (4,754 residents in all), extends beyond Texas County, so no share of the total is worked out for it. Reported testing is thin here: 57 tests over 2008 to 2017, or 2.2 for every 1,000 residents (2025 estimate), where Missouri as a whole comes to 9.3.

From Mountain Grove to Plato, CDC publishes no figure by town: each reads Texas County's.

The cities and towns in Texas County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Mountain Groveextends beyond Texas County4,754+10.0%Counted whole
Licking2,958+9.2%11.4%
Houston2,281+9.6%8.8%
Cabool2,089+7.6%8.0%
Summersvilleextends beyond Texas County474+5.6%Counted whole
Raymondville371+6.3%1.4%
Plato91+5.8%0.4%

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). A place that extends beyond Texas County is counted whole, so it has no share.

Texas County, Homes

Homes in Texas County

Texas County is a place of houses on their own lots: 76% of its 11,034 homes are detached single-family houses, against 70% across Missouri. Half of its homes were built before 1978, close to Missouri's 1978: 23% date from before 1960 and 18% from 2000 or later. Owners live in 77% of the occupied homes (Missouri: 68%), so for most households a test and a fix are their own to order.

Homes in Texas County, Missouri, 2019 to 2023
HomesTexas CountyMissouri
Housing units11,0342,809,501
Detached houses76%70%
In buildings of 5 or more3%13%
Mobile homes15%5%
Built before 196023%28%
Built since 200018%21%
Middle year built19781978
Owner-occupied77%68%

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