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Radon Levels in Lampasas County, Texas

EPA puts Lampasas 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

How to test this homeFind a certified tester

  • Highest bordering

    14.3%

    Bell County

    Bell
    14.3%

    1 of 6 neighbours have 30+ tests, 2007 to 2016

  • Nearest county

    14.3%

    Bell County, 47 miles

    Bell
    14.3%
    Texas
    10.4%

    Share at 4+ pCi/L, 35 tests, 2007 to 2016

  • Ground above low

    1.7%

    25.6 pts below Texas

    Lampasas
    1.7%
    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 Lampasas 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

Lampasas County, At a glance

Lampasas County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Lampasas 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 98% 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 Lampasas County. Bell County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 14.3% of its tests at or above 4 pCi/L.

How to read these figures

Lampasas County, Compared

Lampasas County radon figures, compared

Calculated by Radon411

CDC's county radon counts over the 2007 to 2016 laboratory totals cover 140 Texas counties, and Lampasas County is not among them: no year's figure and no ten-year laboratory total names it. Pooled across 140 Texas counties, 10.4% of reported tests reached that level; across every county in the country with a figure, 35.8%.

Bell County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 14.3% of its tests at or above 4 pCi/L. Farther out, Williamson County (54 miles away) at 2.0%, Travis County (65 miles away) at 9.3% and McLennan County (66 miles away) at 17.1% have figures too. 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 Lampasas County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 98% of the county's land low radon potential.

Texas, the United States and the counties around Lampasas 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
Burnet County, TXborders it771.4%27.4 pCi/L
Coryell County, TXborders it520.0%0.8 pCi/L
Bell County, TXborders it3514.3%1.1 pCi/L
Hamilton County, TXborders it10.0%0.1 pCi/L
The nearest Texas counties to Lampasas County with 30 or more tests, 2007 to 2016, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Bell County47 mi3514.3%1.1 pCi/L
Williamson County54 mi982.0%0.7 pCi/L
Travis County65 mi4089.3%0.8 pCi/L
McLennan County66 mi4117.1%1.0 pCi/L
Brazos County121 mi490.0%0.2 pCi/L
Bexar County122 mi1976.6%0.6 pCi/L
Tarrant County122 mi31210.6%0.9 pCi/L
Dallas County138 mi6998.7%1.0 pCi/L

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

Lampasas County, Geology

The ground under Lampasas County

Predicted

Most of the ground under Lampasas County is one class on USGS's geologic map: 98.3% of its land is low radon potential, with 1.7% moderate. The map puts 92.0% of Lampasas County in the area it calls Central Texas/Gulf Coast Plain and 6.3% in Central Texas, with one smaller area beside them. USGS gives both a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Lampasas County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Central Texas/Gulf Coast PlainCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low792.0%
Central TexasCretaceous through Quaternary marine sandstone, shale, chalk, limestone, siltstone, clay, and lignite.Low76.3%
Llano UpliftPrecambrian metamorphic and undifferentiated igneous rocks.Moderate101.7%

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

Lampasas County beside the ground around it

Across Texas 0.5% of the land is rated high; none of Lampasas County's is. Of the 6 counties that border it, 3 have more moderate-potential ground, San Saba County the most at 47.9%.

Share of land by USGS radon potential: Lampasas County, the 6 counties bordering it and Texas
AreaEPA zoneLow potentialModerate potentialHigh potential
Lampasas CountyZone 398.3%1.7%None
Mills CountyZone 3100%NoneNone
Coryell CountyZone 3100%NoneNone
Hamilton CountyZone 3100%NoneNone
San Saba CountyZone 352.1%47.9%None
Burnet CountyZone 371.3%28.7%None
Bell CountyZone 382.2%17.8%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

Lampasas County, Local resources

Radon testing and mitigation in Lampasas 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

Lampasas County, Questions

Questions about radon in Lampasas County

Are radon levels high in Lampasas County?

No CDC testing statistics are published here for Lampasas County, Texas yet. Bell County, the one bordering county with a figure over the 2007 to 2016 laboratory totals, reported 14.3% of its tests at or above 4 pCi/L.

Which counties border Lampasas County?

Lampasas County borders 6 counties: Mills County, Coryell County, Hamilton County, San Saba County, Burnet County and Bell County.

Products

Lampasas County, Products

Testing a home in Lampasas County

No CDC figure names Lampasas County; the nearest county with one, Bell County (47 miles away), reported 14.3% 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 Lampasas County.

Test kits and monitors3

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Best radon monitors for Lampasas County homes, compared

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Lampasas County, Bordering counties

Counties bordering Lampasas County

Calculated by Radon411

Lampasas County, Cities and towns

Cities and towns in Lampasas County

Lampasas County is growing: the Census Bureau puts it at 23,657 residents on July 1, 2025, up 9.0% from 21,704 in 2020. That works out to 33 people per square mile of land. Copperas Cove, the largest place on its list (40,118 residents in all), extends beyond Lampasas County, so no share of the total is worked out for it. CDC publishes no radon test count for Lampasas County; across Texas its counts for 2007 to 2016 come to 0.1 tests for every 1,000 residents (2025 estimate).

From Copperas Cove to Lometa, CDC publishes no figure by town: each reads Lampasas County's.

The cities and towns in Lampasas County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Copperas Coveextends beyond Lampasas County40,118+9.2%Counted whole
Lampasas7,988+9.3%33.8%
Kempner1,297+12.3%5.5%
Lometa794+5.7%3.4%

4 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 Lampasas County is counted whole, so it has no share.

Lampasas County, Homes

Homes in Lampasas County

Lampasas County is a place of houses on their own lots: 76% of its 9,802 homes are detached single-family houses, against 65% across Texas. Half of its homes were built before 1989, close to Texas' 1990: 19% date from before 1960 and 34% from 2000 or later. Owners live in 80% of the occupied homes (Texas: 63%), so for most households a test and a fix are their own to order.

Homes in Lampasas County, Texas, 2019 to 2023
HomesLampasas CountyTexas
Housing units9,80211,890,808
Detached houses76%65%
In buildings of 5 or more3%21%
Mobile homes15%7%
Built before 196019%13%
Built since 200034%37%
Middle year built19891990
Owner-occupied80%63%

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