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Radon Levels in Midland County, Texas

EPA puts Midland County in Zone 3, its lowest radon zone, and most reported tests there come back low, though 1.0% of 100 (2008 to 2017, laboratory totals) reached 4 pCi/L. 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

    1.0%

    9.2 pts below TX

    Midland
    1.0%
    Texas
    10.2%

    100 tests, 2008 to 2017

  • Median result

    0.7pCi/L

    Below action level

    Midland
    0.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    100

    12th of 22 by tests

    Midland
    100
    Harris
    733

    Reported to CDC before any fix, 2008 to 2017

  • 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

  • Rank in Texas

    18 of 22

    Lowest quarter

    Midland
    1.0%
    Randall
    69.0%

    By share, of 22 with 30+ tests

Read a result for Midland County

Starts at Midland County's median, 0.7 pCi/L

0.7pCi/L

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

EPA’s reading of 0.7 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. Midland County's median reported result, 2008 to 2017.

Interpret this reading

The data

Midland County, At a glance

Midland County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Midland 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 95% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Midland County, 2008 to 2017, laboratory

Reported results by concentration band, Midland County, 2008 to 2017, laboratory
Under 2 pCi/L: 96%2 to 4 pCi/L: 3%4 pCi/L and above: 1%

Of 100 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Midland County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L9696.0%
2 to 4 pCi/L33.0%
4 pCi/L and above11.0%
What these figures count

These are the 100 tests reported to CDC for Midland County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not 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

Midland County, Compared

Midland County radon figures, compared

Calculated by Radon411

Only 1 of 100 radon tests reported for Midland County over the 2008 to 2017 laboratory totals reached 4 pCi/L (1.0%). The median result, 0.7 pCi/L, sits below 2, well under EPA's 4 pCi/L action level, and the top reported result was 5.2 pCi/L.

Across 138 Texas counties pooled together, 10.2% of tests reached that level, so Midland County runs 9.2 points below its state. Against the national pool of 35.7%, the gap is 34.7 points lower. Its place in the state: 18th of 22 Texas counties with 30 or more tests for the same period.

Zone 3 on EPA's map (predicted average under 2 pCi/L) and a 1.0% share point the same way here.

Below the action level, 96 tests (96.0%) came in under 2 pCi/L, against 80.3% statewide, and 3 tests (3.0%) fell between 2 and 4, against 9.6% statewide. USGS geology rates 95% of the county's land low radon potential.

CDC's ten-year totals for Midland County went from 93 tests (2005 to 2014) to 100 (2008 to 2017), the share going from 1.1% to 1.0%.

Midland County against Texas, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Midland County
Midland County1001.0%0.7 pCi/LThis county
Texas, pooled138 counties, pooled4,61510.2%Not pooled+9.2 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+34.7 points
Randall Countyhighest in the state8769.0%6.1 pCi/L+68.0 points
Nueces Countylowest in the state430.0%0.6 pCi/L−1.0 points
Ector County, TXborders it270.0%0.7 pCi/L−1.0 points
Where Midland County's reported results fell, 2008 to 2017, laboratory, beside Texas and the United States
ResultMidland County testsMidland County shareTexas shareU.S. shareAgainst Texas
Under 2 pCi/L9696.0%80.3%39.6%+15.7 points
2 to 4 pCi/L33.0%9.6%24.7%−6.6 points
4 pCi/L and above11.0%10.2%35.7%−9.2 points
Midland County ranked among the 22 Texas counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Brazoria County12 of 22326.3%0.3 pCi/L
Smith County13 of 22525.8%0.8 pCi/L
Montgomery County14 of 221883.2%0.8 pCi/L
Harris County15 of 227332.9%0.4 pCi/L
Fort Bend County16 of 221052.9%0.2 pCi/L
Williamson County17 of 221031.9%0.7 pCi/L
Midland County18 of 221001.0%0.7 pCi/L
Galveston County19 of 22730.0%0.2 pCi/L
El Paso County19 of 22570.0%0.7 pCi/L
Brazos County19 of 22470.0%0.5 pCi/L
Nueces County19 of 22430.0%0.6 pCi/L
Midland County ten-year laboratory totals, against Texas' pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestTexas, pooledChange from the row before
2008 to 20171001.0%0.7 pCi/L5.2 pCi/L10.2%Level
2007 to 20161001.0%0.7 pCi/L5.2 pCi/L10.4%Level
2006 to 20151011.0%0.7 pCi/L5.2 pCi/L11.0%−0.1 points
2005 to 2014931.1%0.7 pCi/L5.2 pCi/L10.6%First on file

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

Midland County, Geology

The ground under Midland County

Predicted

Most of the ground under Midland County is one class on USGS's geologic map: 94.9% of its land is low radon potential, with 5.1% moderate. The map puts 94.9% of Midland County in the area it calls Southern High Plains and Plateaus and 5.1% in Northern High Plains and Plateaus. USGS gives the first a radon index of 7, in the low band (5 to 8), and the second 10, in the moderate band (9 to 11).

USGS's geologic areas under Midland County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Southern High Plains and PlateausPaleozoic and Mesozoic sandstone, limestone, shale.Low794.9%
Northern High Plains and PlateausTertiary sandstone, siltstone, shale.Moderate105.1%

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

Midland County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Midland County's is. Of the 6 counties that border it, 3 have more moderate-potential ground, Glasscock County the most at 84.0%.

Share of land by USGS radon potential: Midland County, the 6 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Midland CountyZone 394.9%5.1%None
Glasscock CountyZone 316.0%84.0%None
Ector CountyZone 3100%NoneNone
Martin CountyZone 3100%NoneNone
Upton CountyZone 341.2%58.8%None
Andrews CountyZone 399.9%0.1%None
Reagan CountyZone 332.8%67.2%None
Texas254 counties, pooled by land areaVaries72.4%26.8%0.5%

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

Local help

Midland County, Local resources

Radon testing and mitigation in Midland 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

Midland County, Questions

Questions about radon in Midland County

Are radon levels high in Midland County?

Over the 2008 to 2017 laboratory totals, 1.0% of the radon tests reported to CDC for Midland County, Texas were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.7 pCi/L. Of 22 Texas counties with 30 or more tests for the same period, 17 reported a higher share; pooled, the state comes to 10.2%.

Which counties border Midland County?

Midland County borders 6 counties: Glasscock County, Ector County, Martin County, Upton County, Andrews County and Reagan County.

Products

Midland County, Products

Testing a home in Midland County

In Midland County, 1.0% of 100 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 10.2% pooled across Texas. 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 Midland County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Midland County homes, compared

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Midland County, Bordering counties

Counties bordering Midland County

Calculated by Radon411

Midland County, Cities and towns

Cities and towns in Midland County

Midland County is growing: the Census Bureau puts it at 187,855 residents on July 1, 2025, up 10.0% from 170,722 in 2020. That works out to 209 people per square mile of land. Midland, the largest place on its list (147,615 residents in all), extends beyond Midland County, so no share of the total is worked out for it. Testing is reported here more often than across the state: CDC's 100 reported tests for 2008 to 2017 come to 0.5 for every 1,000 residents (2025 estimate), against 0.1 for Texas.

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

The cities and towns in Midland County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Midlandextends beyond Midland County147,615+10.8%Counted whole
Odessaextends beyond Midland County122,707+6.8%Counted whole

2 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 Midland County is counted whole, so it has no share.

Midland County, Homes

Homes in Midland County

Of Midland County's 71,565 homes, 63% are detached houses, against 65% across Texas; 20% are in buildings of five or more homes. Half of its homes were built before 1989, close to Texas' 1990: 17% date from before 1960 and 39% from 2000 or later. 68% 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 Midland County, Texas, 2019 to 2023
HomesMidland CountyTexas
Housing units71,56511,890,808
Detached houses63%65%
In buildings of 5 or more20%21%
Mobile homes9%7%
Built before 196017%13%
Built since 200039%37%
Middle year built19891990
Owner-occupied68%63%

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