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Radon Levels in Nolan County, Texas

EPA puts Nolan County in Zone 3, its lowest radon zone, and only 3 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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  • Nearest county

    1.0%

    Midland County, 100 miles

    Midland
    1.0%
    Texas
    10.4%

    Share at 4+ pCi/L, 100 tests, 2007 to 2016

  • Ground above low

    None

    27.3 pts below Texas

    Nolan
    0.0%
    Texas
    27.3%

    Share of land USGS rates moderate or high potential

  • Tests reported

    3

    Too few for a share

    Nolan
    3
    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 Nolan 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

Nolan County, At a glance

Nolan County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

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

CDC holds 3 reported tests for Nolan 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). Nolan County beside the counties around it is how this page reads it.

What these figures count

Only 3 tests were reported to CDC for Nolan 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

Nolan County, Compared

Nolan County radon figures, compared

Calculated by Radon411

CDC's largest figure for Nolan County rests on 3 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 1.2 pCi/L, with a middle value of 0.9 pCi/L.

The nearest counties with a figure are Midland County (100 miles away) at 1.0%, Lubbock County (122 miles away) at 57.8% and Tarrant County (185 miles away) at 10.6%. 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 Nolan 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 Nolan 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
Scurry County, TXborders it1100.0%11.1 pCi/L
Taylor County, TXborders it1811.1%0.6 pCi/L
Runnels County, TXborders it10.0%0.7 pCi/L
Jones County, TXborders it10.0%0.7 pCi/L
The nearest Texas counties to Nolan County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Midland County100 mi1001.0%0.7 pCi/L
Lubbock County122 mi12857.8%4.8 pCi/L
Tarrant County185 mi31210.6%0.9 pCi/L
Bell County193 mi3514.3%1.1 pCi/L
McLennan County195 mi4117.1%1.0 pCi/L
Williamson County201 mi982.0%0.7 pCi/L
Denton County201 mi1817.2%0.9 pCi/L
Randall County203 mi8471.4%6.2 pCi/L
Nolan County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 201730.0%0.9 pCi/L1.2 pCi/L10.2%Level
2007 to 201630.0%0.9 pCi/L1.2 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.

Nolan County, Geology

The ground under Nolan County

Predicted

USGS's geologic map puts all of Nolan 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 Nolan 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.

Nolan County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Nolan County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Mitchell County the most at 61.5%.

Share of land by USGS radon potential: Nolan County, the 7 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Nolan CountyZone 3100%NoneNone
Coke CountyZone 3100%NoneNone
Mitchell CountyZone 338.5%61.5%None
Taylor CountyZone 3100%NoneNone
Fisher CountyZone 3100%NoneNone
Runnels CountyZone 3100%NoneNone
Scurry CountyZone 363.3%36.7%None
Jones 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

Nolan County, Local resources

Radon testing and mitigation in Nolan 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

Nolan County, Questions

Questions about radon in Nolan County

Are radon levels high in Nolan County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Nolan 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 203 miles, the share of tests at or above 4 pCi/L runs from 1.0% to 71.4%.

Which counties border Nolan County?

Nolan County borders 7 counties: Coke County, Mitchell County, Taylor County, Fisher County, Runnels County, Scurry County and Jones County.

Products

Nolan County, Products

Testing a home in Nolan County

No CDC figure names Nolan County; the nearest county with one, Midland County (100 miles away), reported 1.0% 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 Nolan County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Nolan County homes, compared

Explore

Nolan County, Bordering counties

Counties bordering Nolan County

Calculated by Radon411

Nolan County, Cities and towns

Cities and towns in Nolan County

About 14,117 people live in Nolan County by the Census Bureau's estimate for July 1, 2025, 607 fewer than in 2020 (−4.1%). That works out to 15 people per square mile of land. Sweetwater alone is home to 10,141 of them, 71.8% of the total. CDC's 3 reported tests for 2008 to 2017 work out to 0.2 per 1,000 residents (2025 estimate), close to Texas' 0.1.

From Sweetwater to Blackwell, CDC publishes no figure by town: each reads Nolan County's.

The cities and towns in Nolan County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Sweetwater10,141−4.4%71.8%
Roscoe1,208−4.4%8.6%
Blackwellextends beyond Nolan County251−3.5%Counted whole

3 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 Nolan County is counted whole, so it has no share.

Nolan County, Homes

Homes in Nolan County

Nolan County is a place of houses on their own lots: 77% of its 7,129 homes are detached single-family houses, against 65% across Texas. The homes are older than Texas' as a whole: half were built before 1964 (1990 for Texas), and 42% date from before 1960. 66% 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 Nolan County, Texas, 2019 to 2023
HomesNolan CountyTexas
Housing units7,12911,890,808
Detached houses77%65%
In buildings of 5 or more8%21%
Mobile homes7%7%
Built before 196042%13%
Built since 20006%37%
Middle year built19641990
Owner-occupied66%63%

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