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Radon Levels in Baylor County, Texas

EPA puts Baylor County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Nearest county

    7.2%

    Denton County, 124 miles

    Denton
    7.2%
    Texas
    10.4%

    Share at 4+ pCi/L, 181 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Baylor
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    0

    None published

    A home here needs its own test

  • 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 Baylor 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.

The data

Baylor County, At a glance

Baylor County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Baylor 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

No CDC test figures here

CDC has published no radon test figures for Baylor County. Denton County, 124 miles away, is the nearest county with a figure over the 2007 to 2016 laboratory totals.

How to read these figures

Baylor County, Compared

Baylor County radon figures, compared

Calculated by Radon411

Baylor County has no radon test figure of its own from CDC, whose counts over the 2007 to 2016 laboratory totals name 140 other Texas counties and leave it out. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.

The nearest counties with a figure are Denton County (124 miles away) at 7.2%, Tarrant County (126 miles away) at 10.6% and Lubbock County (150 miles away) at 57.8%. 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 Baylor 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 Baylor 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
Wilbarger County, TXborders it10.0%2.6 pCi/L
Wichita County, TXborders it90.0%0.7 pCi/L
The nearest Texas counties to Baylor County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Denton County124 mi1817.2%0.9 pCi/L
Tarrant County126 mi31210.6%0.9 pCi/L
Lubbock County150 mi12857.8%4.8 pCi/L
Dallas County153 mi6998.7%1.0 pCi/L
Collin County155 mi2847.7%1.0 pCi/L
Randall County179 mi8471.4%6.2 pCi/L
McLennan County184 mi4117.1%1.0 pCi/L
Potter County196 mi7020.0%1.1 pCi/L

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

Baylor County, Geology

The ground under Baylor County

Predicted

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

USGS's geologic areas under Baylor County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Central TexasCretaceous 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.

Baylor County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Baylor County's is. None of the 8 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Baylor County, the 8 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Baylor CountyZone 3100%NoneNone
Throckmorton CountyZone 3100%NoneNone
Knox CountyZone 3100%NoneNone
Archer CountyZone 3100%NoneNone
Young CountyZone 3100%NoneNone
Wilbarger CountyZone 3100%NoneNone
Haskell CountyZone 3100%NoneNone
Wichita CountyZone 3100%NoneNone
Foard 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

Baylor County, Local resources

Radon testing and mitigation in Baylor County

What it means

Baylor County, Questions

Questions about radon in Baylor County

Are radon levels high in Baylor County?

No CDC testing statistics are published here for Baylor County, Texas yet. Of the 8 nearest counties with a figure, within 196 miles, the share of tests at or above 4 pCi/L runs from 7.2% to 71.4%.

Which counties border Baylor County?

Baylor County borders 8 counties: Throckmorton County, Knox County, Archer County, Young County, Wilbarger County, Haskell County, Wichita County and Foard County.

Products

Baylor County, Products

Testing a home in Baylor County

No CDC figure names Baylor County; the nearest county with one, Denton County (124 miles away), reported 7.2% 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 Baylor County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Baylor County homes, compared

Explore

Baylor County, Bordering counties

Counties bordering Baylor County

Calculated by Radon411

Baylor County, Cities and towns

Cities and towns in Baylor County

Baylor County's population has barely moved since 2020: 3,472 residents on July 1, 2025 against 3,461 then, by the Census Bureau's estimates. Spread over its land, that is 4.0 people to the square mile. Seymour, its one incorporated place, has 2,574 residents, 74.1% of the total. CDC publishes no radon test count for Baylor County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).

Seymour is the one incorporated place here; CDC publishes no figure by town, so it reads Baylor County's.

Seymour, Baylor County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Seymour2,574−0.1%74.1%

One incorporated place, 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).

Baylor County, Homes

Homes in Baylor County

Baylor County is a place of houses on their own lots: 82% of its 2,170 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1966 (1990 for Texas), and 37% date from before 1960. 67% 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 Baylor County, Texas, 2019 to 2023
HomesBaylor CountyTexas
Housing units2,17011,890,808
Detached houses82%65%
In buildings of 5 or moreunder 1%21%
Mobile homes7%7%
Built before 196037%13%
Built since 200010%37%
Middle year built19661990
Owner-occupied67%63%

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