Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Roosevelt County, New Mexico
EPA puts Roosevelt County in Zone 2, its middle radon zone, and only 2 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
11.1%
Lea County
- Lea
- 11.1%
1 of 7 neighbours have 30+ tests, 2006 to 2015
Nearest county
11.1%
Lea County, 85 miles
- Lea
- 11.1%
- New Mexico
- 30.3%
Share at 4+ pCi/L, 36 tests, 2006 to 2015
Ground above low
100.0%
7.4 pts above New Mexico
- Roosevelt
- 100.0%
- New Mexico
- 92.6%
Share of land USGS rates moderate or high potential
Tests reported
6
Too few for a share
- Roosevelt
- 6
- Needed
- 30
2005 to 2014, laboratory
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Roosevelt County
Starts at EPA's action level
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
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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
Roosevelt County, At a glance
Roosevelt County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Roosevelt County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Roosevelt County, 2008 to 2017, laboratory
CDC holds 2 reported tests for Roosevelt County over the 2008 to 2017 laboratory totals, with a median of 8.0 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Roosevelt County beside the counties around it is how this page reads it.
What these figures count
Only 2 tests were reported to CDC for Roosevelt 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).
Roosevelt County, Compared
Roosevelt County radon figures, compared
Calculated by Radon411CDC's largest figure for Roosevelt County rests on 6 tests over the 2005 to 2014 laboratory totals, 3 of them at or above 4 pCi/L, so each test moves its share by 16.7 points and no rank or comparison is drawn from it. Results reached as high as 9.3 pCi/L, with a middle value of 3.4 pCi/L.
Lea County, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 11.1% of its tests at or above 4 pCi/L. Farther out, Lincoln County (115 miles away) at 20.6%, San Miguel County (126 miles away) at 44.4% and Otero County (163 miles away) at 10.7% 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 Roosevelt County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Roosevelt County, Geology
The ground under Roosevelt County
PredictedUSGS's geologic map puts all of Roosevelt County's mapped land in one class: moderate radon potential. The map puts 53.8% of Roosevelt County in the area it calls Great Plains Pecos Valley Section and 46.2% in Ogallala Formation/High Plains. USGS gives both a radon index of 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Great Plains Pecos Valley Section | Triassic sandstone, siltstone, mudstone, Quaternary alluvial and eolian sand and silt. | Moderate | 9 | 53.8% |
| Ogallala Formation/High Plains | Sandstone, siltstone, minor shale of the Ogallala Formation. | Moderate | 9 | 46.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Roosevelt County beside the ground around it
Across New Mexico 19.2% of the land is rated high; none of Roosevelt County's is. Of the 7 counties that border it, none has as large a share of moderate-potential ground; Chaves County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Roosevelt County, Local resources
Radon testing and mitigation in Roosevelt County
- New Mexico Indoor Radon Outreach ProgramNew Mexico Indoor Radon Outreach Program, run by New Mexico Environment Department, does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in New Mexico.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
The New Mexico Environment Department seasonally distributes free radon testing kits to the public on a first-come, first-served basis.
- Compare kits
- See the New Mexico directoryNo professionals are listed in New Mexico yet. The state program can point you to registered testers and mitigators.
What New Mexico's program says
- Phone
- (505) 476-8600
- radon.questions@env.nm.gov
- Licensing of radon professionals
There is not currently a certification program within the state.
What it means
Roosevelt County, Questions
Questions about radon in Roosevelt County
Are radon levels high in Roosevelt County?
Over the 2008 to 2017 laboratory totals, 100.0% of the radon tests reported to CDC for Roosevelt County, New Mexico were at or above 4 pCi/L, and the median reported pre-mitigation result was 8.0 pCi/L. Lea County, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 11.1% of its tests at or above 4 pCi/L.
Which counties border Roosevelt County?
Roosevelt County borders 7 counties: Curry County, NM, Bailey County, TX, Cochran County, TX, De Baca County, NM, Quay County, NM, Chaves County, NM and Lea County, NM.
Products
Roosevelt County, Products
Testing a home in Roosevelt County
No CDC figure names Roosevelt County; the nearest county with one, Lea County (85 miles away), reported 11.1% 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 Roosevelt County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Roosevelt County, Bordering counties
Counties bordering Roosevelt County
Calculated by Radon411- Radon levels in Curry County, NMEPA zone 2
69.2%at or above 4 pCi/L
Median 4.8 pCi/L · 13 tests
- Radon levels in Quay County, NMEPA zone 2
66.7%at or above 4 pCi/L
Median 5.0 pCi/L · 3 tests
- Radon levels in Chaves County, NMEPA zone 2
64.3%at or above 4 pCi/L
Median 6.3 pCi/L · 14 tests
- Radon levels in Lea County, NMEPA zone 2
11.1%at or above 4 pCi/L
Median 1.9 pCi/L · 36 tests
- Radon levels in Bailey County, TXEPA zone 2
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Cochran County, TXEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in De Baca County, NMEPA zone 2
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Roosevelt County, Cities and towns
Cities and towns in Roosevelt County
About 18,615 people live in Roosevelt County by the Census Bureau's estimate for July 1, 2025, 538 fewer than in 2020 (−2.8%). Spread over its land, that is 7.6 people to the square mile. Portales alone is home to 11,734 of them, 63.0% of the total. Together its 5 incorporated places hold 65.3% of those residents; the other 34.7% live outside any of them. Reported testing is thin here: 6 tests over 2005 to 2014, or 0.3 for every 1,000 residents (2025 estimate), where New Mexico as a whole comes to 2.2.
From Portales to Causey, CDC publishes no figure by town: each reads Roosevelt County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Portales | 11,734 | −3.2% | 63.0% |
| Elida | 154 | −1.9% | 0.8% |
| Dora | 117 | −3.3% | 0.6% |
| Floyd | 84 | −2.3% | 0.5% |
| Causey | 66 | −4.3% | 0.4% |
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).
Roosevelt County, Homes
Homes in Roosevelt County
Of Roosevelt County's 8,525 homes, 70% are detached houses, against 65% across New Mexico; 18% are mobile homes. Half of its homes were built before 1980, close to New Mexico's 1984: 24% date from before 1960 and 21% from 2000 or later. 62% of occupied homes are lived in by their owner (New Mexico: 69%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Roosevelt County | New Mexico |
|---|---|---|
| Housing units | 8,525 | 949,524 |
| Detached houses | 70% | 65% |
| In buildings of 5 or more | 4% | 10% |
| Mobile homes | 18% | 16% |
| Built before 1960 | 24% | 17% |
| Built since 2000 | 21% | 24% |
| Middle year built | 1980 | 1984 |
| Owner-occupied | 62% | 69% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.