
Short-term kit![]()
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
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
4 of 7 neighbours have 30+ tests, 2006 to 2015
Nearest county
25.2%
Bernalillo County, 55 miles
Share at 4+ pCi/L, 1,342 tests, 2006 to 2015
Ground above low
100.0%
7.4 pts above New Mexico
Share of land USGS rates moderate or high potential
Tests reported
13
Too few for a share
2005 to 2014, laboratory
EPA radon zone
Zone 2
Moderate potential
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Torrance County
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
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
Predicted: EPA radon zone
Torrance County is a
USGS geologic potential: Moderate across 90% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
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.
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).
Torrance County, Compared
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.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Torrance County, Geology
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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Basin and Range Sacramento Section | Paleozoic marine limestones and shales. | Moderate | 10 | 58.4% |
| Basin and Range | Triassic and Quaternary sedimentary deposits. | Moderate | 9 | 27.4% |
| Rocky Mountains (southern extension) | Sandstone, siltstone, shale, volcanic sediments, and valley-fill alluvium. | High | 12 | 9.9% |
| Great Plains Pecos Valley Section | Triassic sandstone, siltstone, mudstone, Quaternary alluvial and eolian sand and silt. | Moderate | 9 | 3.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
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%.
The map rates the ground, not the air in any home.
Local help
Torrance County, Local resources
The New Mexico Environment Department seasonally distributes free radon testing kits to the public on a first-come, first-served basis.
There is not currently a certification program within the state.
What it means
Torrance County, Questions
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.
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
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 monitors: 1 of 3
Explore
Torrance County, Bordering counties
44.4%at or above 4 pCi/L
Median 3.5 pCi/L · 36 tests
32.5%at or above 4 pCi/L
Median 2.8 pCi/L · 2,019 tests
25.2%at or above 4 pCi/L
Median 2.1 pCi/L · 1,342 tests
20.6%at or above 4 pCi/L
Median 1.9 pCi/L · 34 tests
15.4%at or above 4 pCi/L
Median 1.9 pCi/L · 26 tests
0.0%at or above 4 pCi/L
Median 0.9 pCi/L · 8 tests
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Torrance County, Cities and towns
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.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Moriarty | 2,074 | +7.0% | 12.9% |
| Estancia | 1,321 | +5.3% | 8.2% |
| Mountainair | 932 | +6.0% | 5.8% |
| Willard | 217 | +6.9% | 1.3% |
| Encino | 56 | +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
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 | Torrance County | New Mexico |
|---|---|---|
| Housing units | 7,238 | 949,524 |
| Detached houses | 51% | 65% |
| In buildings of 5 or more | 2% | 10% |
| Mobile homes | 45% | 16% |
| Built before 1960 | 14% | 17% |
| Built since 2000 | 13% | 24% |
| Middle year built | 1986 | 1984 |
| Owner-occupied | 82% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.