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
Radon Levels in Cimarron County, Oklahoma
EPA puts Cimarron County in Zone 2, its middle radon zone, and only 3 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
64.5%
Baca County
- Baca
- 64.5%
1 of 6 neighbours have 30+ tests, 2006 to 2015
Nearest county
8.9%
Oklahoma County, 297 miles
- Oklahoma
- 8.9%
- Oklahoma
- 12.6%
Share at 4+ pCi/L, 135 tests, 2006 to 2015
Ground above low
100.0%
84.8 pts above Oklahoma
- Cimarron
- 100.0%
- Oklahoma
- 15.2%
Share of land USGS rates moderate or high potential
Tests reported
3
Too few for a share
- Cimarron
- 3
- Needed
- 30
2008 to 2017, 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 Cimarron 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
Cimarron County, At a glance
Cimarron County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Cimarron County is a
USGS geologic potential: Moderate across 79% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Cimarron County, 2008 to 2017, laboratory
CDC holds 3 reported tests for Cimarron County over the 2008 to 2017 laboratory totals, with a median of 4.7 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Cimarron County beside the counties around it is how this page reads it.
What these figures count
Only 3 tests were reported to CDC for Cimarron 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).
Cimarron County, Compared
Cimarron County radon figures, compared
Calculated by Radon411CDC's largest figure for Cimarron County rests on 3 tests over the 2008 to 2017 laboratory totals, 2 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 11.5 pCi/L, with a middle value of 4.7 pCi/L.
Baca County, CO, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 64.5% of its tests at or above 4 pCi/L. Farther out, Oklahoma County (297 miles away) at 8.9%, Washington County (367 miles away) at 11.3% and Tulsa County (369 miles away) at 6.0% have figures too. Pooled across 53 Oklahoma counties, 12.6% of reported tests reached that level; across every county in the country with a figure, 36.3%.
Statewide for the same period, Delaware County reported the highest share (44.7%) and Tulsa County the lowest (6.0%). EPA's 1993 map puts Cimarron County in Zone 2, its middle label: a predicted county average between 2 and 4 pCi/L. USGS geology rates 79% of the county's land moderate radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Cimarron County, Geology
The ground under Cimarron County
PredictedMost of the ground under Cimarron County is one class on USGS's geologic map: 78.9% of its land is moderate radon potential, with 21.1% high. The map puts 75.6% of Cimarron County in the area it calls High Plains and 21.1% in High Plains, with one smaller area beside them. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| High Plains | Tertiary sandstone, siltstone, shale. | Moderate | 9 | 75.6% |
| High Plains | Quaternary deposits and Cretaceous marine shales that locally have a high radiometric signature. | High | 12 | 21.1% |
| Cimmaron River Valley | Tertiary and Quaternary sandstone, siltstone, shale, and alluvium overlain by eolian sand and loess. | Moderate | 10 | 3.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Cimarron County beside the ground around it
Cimarron County has more high-potential ground than Oklahoma as a whole: 21.1% of its land against 0.6%. Of the 6 counties that border it, 3 have more high-potential ground, Baca County, CO the most at 97.8%.
The map rates the ground, not the air in any home.
Local help
Cimarron County, Local resources
Radon testing and mitigation in Cimarron County
- Oklahoma's radon programDepartment of Environmental QualityOklahoma's radon program answers questions about testing, mitigation and the rules in Oklahoma.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- See the Oklahoma directoryNo professionals are listed in Oklahoma yet. The state program can point you to registered testers and mitigators.
What it means
Cimarron County, Questions
Questions about radon in Cimarron County
Are radon levels high in Cimarron County?
Over the 2008 to 2017 laboratory totals, 66.7% of the radon tests reported to CDC for Cimarron County, Oklahoma were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.7 pCi/L. Baca County, CO, the one bordering county with a figure over the 2006 to 2015 laboratory totals, reported 64.5% of its tests at or above 4 pCi/L.
Which counties border Cimarron County?
Cimarron County borders 6 counties: Baca County, CO, Dallam County, TX, Sherman County, TX, Morton County, KS, Texas County, OK and Union County, NM.
Products
Cimarron County, Products
Testing a home in Cimarron County
No CDC figure names Cimarron County; the nearest county with one, Oklahoma County (297 miles away), reported 8.9% 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 Cimarron County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
MonitorAEGTEST
HOUND-3786 rechargeable radon monitor with a 3.5-inch color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Cimarron County, Bordering counties
Counties bordering Cimarron County
Calculated by Radon411- Radon levels in Dallam County, TXEPA zone 2
100.0%at or above 4 pCi/L
Median 4.2 pCi/L · 1 test
- Radon levels in Union County, NMEPA zone 2
100.0%at or above 4 pCi/L
Median 4.1 pCi/L · 1 test
- Radon levels in Texas County, OKEPA zone 2
66.7%at or above 4 pCi/L
Median 5.2 pCi/L · 9 tests
- Radon levels in Baca County, COEPA zone 1
64.5%at or above 4 pCi/L
Median 4.7 pCi/L · 31 tests
- Radon levels in Sherman County, TXEPA zone 2
0.0%at or above 4 pCi/L
Median 1.3 pCi/L · 1 test
- Radon levels in Morton County, KSEPA zone 2
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Cimarron County, Cities and towns
Cities and towns in Cimarron County
Cimarron County has been losing residents: from 2,287 in 2020 to 2,059 on July 1, 2025, a fall of 10.0% by the Census Bureau's estimates. Spread over its land, that is 1.1 people to the square mile. Boise City alone is home to 1,040 of them, 50.5% of the total. Together its 2 incorporated places hold 62.4% of those residents; the other 37.6% live outside any of them. Testing is reported here more often than across the state: CDC's 3 reported tests for 2008 to 2017 come to 1.5 for every 1,000 residents (2025 estimate), against 0.2 for Oklahoma.
From Boise City to Keyes, CDC publishes no figure by town: each reads Cimarron County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Boise City | 1,040 | −10.4% | 50.5% |
| Keyes | 244 | −10.3% | 11.9% |
2 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).
Cimarron County, Homes
Homes in Cimarron County
Cimarron County is a place of houses on their own lots: 84% of its 1,368 homes are detached single-family houses, against 73% across Oklahoma. The homes are older than Oklahoma's as a whole: half were built before 1960 (1980 for Oklahoma), and 49% date from before 1960. Owners live in 77% of the occupied homes (Oklahoma: 66%), so for most households a test and a fix are their own to order.
| Homes | Cimarron County | Oklahoma |
|---|---|---|
| Housing units | 1,368 | 1,763,036 |
| Detached houses | 84% | 73% |
| In buildings of 5 or more | 1% | 12% |
| Mobile homes | 12% | 9% |
| Built before 1960 | 49% | 21% |
| Built since 2000 | 6% | 25% |
| Middle year built | 1960 | 1980 |
| Owner-occupied | 77% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.