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Radon Levels in Torrance County, New Mexico

EPA puts Torrance County in Zone 2, its middle radon zone, and only 7 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

  • Highest bordering

    44.4%

    San Miguel County

    San Miguel
    44.4%
    Lincoln
    20.6%

    4 of 7 neighbours have 30+ tests, 2006 to 2015

  • Nearest county

    25.2%

    Bernalillo County, 55 miles

    Bernalillo
    25.2%
    New Mexico
    30.3%

    Share at 4+ pCi/L, 1,342 tests, 2006 to 2015

  • Ground above low

    100.0%

    7.4 pts above New Mexico

    Torrance
    100.0%
    New Mexico
    92.6%

    Share of land USGS rates moderate or high potential

  • Tests reported

    13

    Too few for a share

    Torrance
    13
    Needed
    30

    2005 to 2014, laboratory

  • 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

Read a result for Torrance 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

Torrance County, At a glance

Torrance County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Torrance 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 90% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

CDC holds 7 reported tests for Torrance County over the 2008 to 2017 laboratory totals, with a median of 2.2 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Torrance County beside the counties around it is how this page reads it.

What these figures count

Only 7 tests were reported to CDC for Torrance 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

Torrance County, Compared

Torrance County radon figures, compared

Calculated by Radon411

CDC's largest figure for Torrance County rests on 13 tests over the 2005 to 2014 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 7.7 points and no rank or comparison is drawn from it. Results reached as high as 8.4 pCi/L, with a middle value of 0.8 pCi/L.

Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: San Miguel County reported the largest share at or above 4 pCi/L, 44.4%, and Lincoln County the smallest, 20.6%, with Santa Fe County at 32.5% and Bernalillo County at 25.2% between. Farther out, Los Alamos County (89 miles away) at 38.3%, Sandoval County (92 miles away) at 24.7% and Taos County (134 miles away) at 71.9% have figures too. Pooled across 30 New Mexico counties, 30.3% of reported tests reached that level; across every county in the country with a figure, 36.3%.

Statewide for the same period, Taos County reported the highest share (71.9%) and Otero County the lowest (10.7%). EPA's 1993 map puts Torrance County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 90% of the county's land moderate radon potential.

New Mexico, the United States and the counties around Torrance County, 2006 to 2015, laboratory
AreaTestsAt or above 4 pCi/LMedian
New Mexico, pooled30 counties, pooled4,25130.3%Not pooled
United States, pooled2,669 counties, pooled1,805,52836.3%Not pooled
Taos Countyhighest in the state9671.9%7.7 pCi/L
Otero Countylowest in the state5610.7%1.1 pCi/L
San Miguel County, NMborders it3644.4%3.5 pCi/L
Santa Fe County, NMborders it2,01932.5%2.8 pCi/L
Bernalillo County, NMborders it1,34225.2%2.1 pCi/L
Lincoln County, NMborders it3420.6%1.9 pCi/L
Valencia County, NMborders it2615.4%1.9 pCi/L
Socorro County, NMborders it80.0%0.9 pCi/L
The nearest New Mexico counties to Torrance County with 30 or more tests, 2006 to 2015, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Bernalillo County55 mi1,34225.2%2.1 pCi/L
Santa Fe County60 mi2,01932.5%2.8 pCi/L
Lincoln County66 mi3420.6%1.9 pCi/L
San Miguel County82 mi3644.4%3.5 pCi/L
Los Alamos County89 mi9438.3%3.0 pCi/L
Sandoval County92 mi15024.7%2.0 pCi/L
Taos County134 mi9671.9%7.7 pCi/L
Otero County140 mi5610.7%1.1 pCi/L
Torrance County ten-year laboratory totals, against New Mexico's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestNew Mexico, pooledChange from the row before
2008 to 2017714.3%2.2 pCi/L8.4 pCi/L28.5%+3.2 points
2007 to 2016911.1%2.1 pCi/L8.4 pCi/L30.0%+1.1 points
2006 to 20151010.0%2.0 pCi/L8.4 pCi/L30.3%+2.3 points
2005 to 2014137.7%0.8 pCi/L8.4 pCi/L29.7%First on file

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

Torrance County, Geology

The ground under Torrance County

Predicted

Most of the ground under Torrance County is one class on USGS's geologic map: 90.1% of its land is moderate radon potential, with 9.9% high. The map puts 58.4% of Torrance County in the area it calls Basin and Range Sacramento Section and 27.4% in Basin and Range, with 2 smaller areas beside them. USGS gives the first a radon index of 10 and the second 9, both in the moderate band (9 to 11).

USGS's geologic areas under Torrance County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Basin and Range Sacramento SectionPaleozoic marine limestones and shales.Moderate1058.4%
Basin and RangeTriassic and Quaternary sedimentary deposits.Moderate927.4%
Rocky Mountains (southern extension)Sandstone, siltstone, shale, volcanic sediments, and valley-fill alluvium.High129.9%
Great Plains Pecos Valley SectionTriassic sandstone, siltstone, mudstone, Quaternary alluvial and eolian sand and silt.Moderate93.8%

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

Torrance County beside the ground around it

On high-potential ground Torrance County is close to New Mexico as a whole: 9.9% of its land against 19.2%. Of the 7 counties that border it, 4 have more high-potential ground, Santa Fe County the most at 68.9%.

Share of land by USGS radon potential: Torrance County, the 7 counties bordering it and New Mexico
AreaEPA zoneLow potentialModerate potentialHigh potential
Torrance CountyZone 2None90.1%9.9%
Valencia CountyZone 2None90.9%9.1%
Bernalillo CountyZone 1None67.7%32.3%
Santa Fe CountyZone 1None31.1%68.9%
Lincoln CountyZone 2None94.0%6.0%
Guadalupe CountyZone 2None100%None
Socorro CountyZone 2None77.0%23.0%
San Miguel CountyZone 1None83.1%16.9%
New Mexico33 counties, pooled by land areaVaries7.4%73.4%19.2%

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

What it means

Torrance County, Questions

Questions about radon in Torrance County

Are radon levels high in Torrance County?

Over the 2008 to 2017 laboratory totals, 14.3% of the radon tests reported to CDC for Torrance County, New Mexico were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. Of the counties bordering it, 4 have a figure over the 2006 to 2015 laboratory totals: San Miguel County reported the largest share at or above 4 pCi/L, 44.4%, and Lincoln County the smallest, 20.6%, with Santa Fe County at 32.5% and Bernalillo County at 25.2% between.

Which counties border Torrance County?

Torrance County borders 7 counties: Valencia County, Bernalillo County, Santa Fe County, Lincoln County, Guadalupe County, Socorro County and San Miguel County.

Products

Torrance County, Products

Testing a home in Torrance County

No CDC figure names Torrance County; the nearest county with one, Bernalillo County (55 miles away), reported 25.2% of its tests at or above 4 pCi/L over the 2006 to 2015 laboratory totals, the only reading nearby until a test of this home. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Torrance County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Torrance County homes, compared

Explore

Torrance County, Bordering counties

Counties bordering Torrance County

Calculated by Radon411

Torrance County, Cities and towns

Cities and towns in Torrance County

Torrance County is growing: the Census Bureau puts it at 16,100 residents on July 1, 2025, up 6.9% from 15,059 in 2020. Spread over its land, that is 4.8 people to the square mile. No town dominates: Moriarty, the largest, has 2,074 residents, 12.9% of the total. Together its 5 incorporated places hold 28.6% of those residents; the other 71.4% live outside any of them. Reported testing is thin here: 13 tests over 2005 to 2014, or 0.8 for every 1,000 residents (2025 estimate), where New Mexico as a whole comes to 2.2.

From Moriarty to Encino, CDC publishes no figure by town: each reads Torrance County's.

The cities and towns in Torrance County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Moriarty2,074+7.0%12.9%
Estancia1,321+5.3%8.2%
Mountainair932+6.0%5.8%
Willard217+6.9%1.3%
Encino56+7.7%0.3%

5 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).

Torrance County, Homes

Homes in Torrance County

Mobile homes are 45% of Torrance County's 7,238 homes and detached houses 51%, against 65% across New Mexico. Half of its homes were built before 1986, close to New Mexico's 1984: 14% date from before 1960 and 13% from 2000 or later. Owners live in 82% of the occupied homes (New Mexico: 69%), so for most households a test and a fix are their own to order.

Homes in Torrance County, New Mexico, 2019 to 2023
HomesTorrance CountyNew Mexico
Housing units7,238949,524
Detached houses51%65%
In buildings of 5 or more2%10%
Mobile homes45%16%
Built before 196014%17%
Built since 200013%24%
Middle year built19861984
Owner-occupied82%69%

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