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Radon Levels in Lincoln County, New Mexico

EPA puts Lincoln County in Zone 2, its middle radon zone, and only 22 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

  • Share at 4+ pCi/L

    19.4%

    10.3 pts below NM

    Lincoln
    19.4%
    New Mexico
    29.7%

    36 tests, 2005 to 2014

  • Median result

    1.9pCi/L

    Below action level

    Lincoln
    1.9 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2005 to 2014

  • Tests reported

    36

    11th of 13 by tests

    Lincoln
    36
    Santa Fe
    2,314

    Reported to CDC before any fix, 2005 to 2014

  • 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

  • Rank in New Mexico

    9 of 13

    Middle half

    Lincoln
    19.4%
    Taos
    69.2%

    By share, of 13 with 30+ tests

Read a result for Lincoln County

Starts at Lincoln County's median, 1.9 pCi/L

1.9pCi/L

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

EPA’s reading of 1.9 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. Lincoln County's median reported result, 2005 to 2014.

The data

Lincoln County, At a glance

Lincoln County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Lincoln 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 94% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

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

CDC holds 22 reported tests for Lincoln County over the 2008 to 2017 laboratory totals, with a median of 1.9 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Lincoln County beside the counties around it is how this page reads it.

What these figures count

Only 22 tests were reported to CDC for Lincoln 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

Lincoln County, Compared

Lincoln County radon figures, compared

Calculated by Radon411

Lincoln County's 36 reported tests over the 2005 to 2014 laboratory totals had a middle value of 1.9 pCi/L and a maximum of 9.3 pCi/L, and 19.4% reached 4 pCi/L. New Mexico as a whole (30 New Mexico counties, pooled) comes to 29.7%: 10.3 points higher than here.

The newest figure, over the 2008 to 2017 laboratory totals, counts only 22 tests (27.3% at or above 4 pCi/L), too few to compare, so this reading uses the 36-test figure.

Among its state's counties it ranks 9th of 13 New Mexico counties with 30 or more tests for the same period. Statewide for the same period, Taos County reported the highest share (69.2%) and Otero County the lowest (11.3%).

Below the action level, 20 tests (55.6%) came in under 2 pCi/L, against 38.8% statewide, and 9 tests (25.0%) fell between 2 and 4, against 31.4% statewide. CDC's ten-year totals for Lincoln County went from 36 tests (2005 to 2014) to 22 (2008 to 2017), the share going from 19.4% to 27.3%.

EPA's 1993 zone map puts Lincoln County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 94% of the county's land moderate radon potential.

Otero County, the one bordering county with a figure for the same period, reported 11.3%.

Lincoln County against New Mexico, the United States and nearby counties, 2005 to 2014, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Lincoln County
Lincoln County3619.4%1.9 pCi/LThis county
New Mexico, pooled30 counties, pooled4,64329.7%Not pooled+10.3 points
United States, pooled2,655 counties, pooled1,669,35336.0%Not pooled+16.6 points
Taos Countyhighest in the state9169.2%7.7 pCi/L+49.8 points
Lea Countylowest in the state3511.4%1.8 pCi/L−8.0 points
Chaves County, NMborders it2544.0%3.4 pCi/L+24.6 points
Otero County, NMborders it5311.3%1.0 pCi/L−8.1 points
Torrance County, NMborders it137.7%0.8 pCi/L−11.7 points
Sierra County, NMborders it70.0%1.4 pCi/L−19.4 points
Socorro County, NMborders it80.0%0.8 pCi/L−19.4 points
Where Lincoln County's reported results fell, 2005 to 2014, laboratory, beside New Mexico and the United States
ResultLincoln County testsLincoln County shareNew Mexico shareU.S. shareAgainst New Mexico
Under 2 pCi/L2055.6%38.8%39.8%+16.8 points
2 to 4 pCi/L925.0%31.4%24.2%−6.4 points
4 pCi/L and above719.4%29.7%36.0%−10.3 points
Lincoln County ranked among the 13 New Mexico counties with 30 or more tests, by share at or above 4 pCi/L, 2005 to 2014, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
San Miguel County3 of 133740.5%3.5 pCi/L
San Juan County4 of 135933.9%2.2 pCi/L
Santa Fe County5 of 132,31431.9%2.8 pCi/L
Bernalillo County6 of 131,35825.7%2.2 pCi/L
Los Alamos County7 of 139225.0%2.5 pCi/L
Sandoval County8 of 1316823.2%2.0 pCi/L
Lincoln County9 of 133619.4%1.9 pCi/L
Doña Ana County10 of 1311614.7%1.3 pCi/L
Valencia County11 of 133112.9%1.7 pCi/L
Lea County12 of 133511.4%1.8 pCi/L
Otero County13 of 135311.3%1.0 pCi/L
Lincoln 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 20172227.3%1.9 pCi/L9.3 pCi/L28.5%−1.9 points
2007 to 20162429.2%1.9 pCi/L9.3 pCi/L30.0%+8.6 points
2006 to 20153420.6%1.9 pCi/L9.3 pCi/L30.3%+1.2 points
2005 to 20143619.4%1.9 pCi/L9.3 pCi/L29.7%First on file

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

Lincoln County, Geology

The ground under Lincoln County

Predicted

Most of the ground under Lincoln County is one class on USGS's geologic map: 94.0% of its land is moderate radon potential, with 6.0% high. The map puts 70.6% of Lincoln County in the area it calls Basin and Range Sacramento Section and 21.9% in Basin and Range, with 2 smaller areas beside them. USGS gives both a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Lincoln County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Basin and Range Sacramento SectionPaleozoic marine limestones and shales.Moderate1070.6%
Basin and RangeTertiary volcanic and Cretaceous sedimentary rocks.Moderate1021.9%
Rocky Mountains (southern extension)Sandstone, siltstone, shale, volcanic sediments, and valley-fill alluvium.High126.0%
Great Plains Pecos Valley SectionTriassic sandstone, siltstone, mudstone, Quaternary alluvial and eolian sand and silt.Moderate91.5%

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

Lincoln County beside the ground around it

New Mexico as a whole has more high-potential ground than Lincoln County: 19.2% of its land, against 6.0% here. Of the 7 counties that border it, 4 have more high-potential ground, Sierra County the most at 50.4%.

Share of land by USGS radon potential: Lincoln County, the 7 counties bordering it and New Mexico
AreaEPA zoneLow potentialModerate potentialHigh potential
Lincoln CountyZone 2None94.0%6.0%
Torrance CountyZone 2None90.1%9.9%
Otero CountyZone 2None60.5%39.5%
Chaves CountyZone 2None100%None
De Baca CountyZone 2None100%None
Socorro CountyZone 2None77.0%23.0%
Guadalupe CountyZone 2None100%None
Sierra CountyZone 21.1%48.6%50.4%
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

Lincoln County, Questions

Questions about radon in Lincoln County

Are radon levels high in Lincoln County?

Over the 2008 to 2017 laboratory totals, 27.3% of the radon tests reported to CDC for Lincoln County, New Mexico were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 13 New Mexico counties with 30 or more tests for the same period, 8 reported a higher share; pooled, the state comes to 29.7%.

Which counties border Lincoln County?

Lincoln County borders 7 counties: Torrance County, Otero County, Chaves County, De Baca County, Socorro County, Guadalupe County and Sierra County.

Products

Lincoln County, Products

Testing a home in Lincoln County

In Lincoln County, 19.4% of 36 tests reported to CDC over the 2005 to 2014 laboratory totals reached 4 pCi/L, against 29.7% pooled across New Mexico. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Lincoln County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Lincoln County homes, compared

Explore

Lincoln County, Bordering counties

Counties bordering Lincoln County

Calculated by Radon411

Lincoln County, Cities and towns

Cities and towns in Lincoln County

About 19,844 people live in Lincoln County by the Census Bureau's estimate for July 1, 2025, 464 fewer than in 2020 (−2.3%). Spread over its land, that is 4.1 people to the square mile. Its largest town, Ruidoso, has 7,580 residents, 38.2% of the total. Together its 5 incorporated places hold 63.8% of those residents; the other 36.2% live outside any of them. CDC's 36 reported tests for 2005 to 2014 work out to 1.8 per 1,000 residents (2025 estimate), close to New Mexico's 2.2.

From Ruidoso to Corona, CDC publishes no figure by town: each reads Lincoln County's.

The cities and towns in Lincoln County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Ruidoso7,580−1.5%38.2%
Ruidoso Downs2,588−2.6%13.0%
Capitan1,402+0.1%7.1%
Carrizozo959−2.2%4.8%
Corona128−1.5%0.6%

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).

Lincoln County, Homes

Homes in Lincoln County

Of Lincoln County's 17,768 homes, 64% are detached houses, against 65% across New Mexico; 26% are mobile homes. Half of its homes were built before 1985, close to New Mexico's 1984: 11% date from before 1960 and 26% from 2000 or later. Owners live in 80% of the occupied homes (New Mexico: 69%), so for most households a test and a fix are their own to order.

Homes in Lincoln County, New Mexico, 2019 to 2023
HomesLincoln CountyNew Mexico
Housing units17,768949,524
Detached houses64%65%
In buildings of 5 or more4%10%
Mobile homes26%16%
Built before 196011%17%
Built since 200026%24%
Middle year built19851984
Owner-occupied80%69%

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