Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Greer County, Oklahoma
EPA puts Greer County in Zone 3, its lowest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Nearest county
8.9%
Oklahoma County, 129 miles
- Oklahoma
- 8.9%
- Oklahoma
- 12.6%
Share at 4+ pCi/L, 135 tests, 2006 to 2015
Ground above low
None
15.2 pts below Oklahoma
- Greer
- 0.0%
- Oklahoma
- 15.2%
Share of land USGS rates moderate or high potential
Tests reported
0
None published
A home here needs its own test
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Greer 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
Greer County, At a glance
Greer County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
No CDC test figures here
CDC has published no radon test figures for Greer County. Oklahoma County, 129 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Greer County, Compared
Greer County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2006 to 2015 laboratory totals cover 53 Oklahoma counties, and Greer County is not among them: no year's figure and no ten-year laboratory total names it. Pooled across 53 Oklahoma counties, 12.6% of reported tests reached that level; across every county in the country with a figure, 36.3%.
The nearest counties with a figure are Oklahoma County (129 miles away) at 8.9%, Tulsa County (220 miles away) at 6.0% and Washington County (239 miles away) at 11.3%. 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 Greer County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 100% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Greer County, Geology
The ground under Greer County
PredictedUSGS's geologic map puts all of Greer County's mapped land in one class: low radon potential. The map puts 85.9% of Greer County in the area it calls Central Oklahoma Plains and Hills and 14.1% in Wichita Mountains. USGS gives the first a radon index of 7 and the second 6, both in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Central Oklahoma Plains and Hills | Nonmarine Permian and Tertiary rocks, including shale, sandstone, and conglomerate in the western part, and Mississippian and Pennsylvanian rocks in the eastern part. | Low | 7 | 85.9% |
| Wichita Mountains | Granite, rhyolite, abd gabbro. | Low | 6 | 14.1% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Greer County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Greer County's is. Of the 4 counties that border it, 1 has more moderate-potential ground, Beckham County the most at 0.1%.
The map rates the ground, not the air in any home.
Local help
Greer County, Local resources
Radon testing and mitigation in Greer 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
Greer County, Questions
Questions about radon in Greer County
Are radon levels high in Greer County?
No CDC testing statistics are published here for Greer County, Oklahoma yet. Of the 5 nearest counties with a figure, within 286 miles, the share of tests at or above 4 pCi/L runs from 6.0% to 44.7%.
Which counties border Greer County?
Greer County borders 4 counties: Harmon County, Jackson County, Beckham County and Kiowa County.
Products
Greer County, Products
Testing a home in Greer County
No CDC figure names Greer County; the nearest county with one, Oklahoma County (129 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. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Greer County.
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
Monitor
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Greer County, Bordering counties
Counties bordering Greer County
Calculated by Radon411- Radon levels in Jackson CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 3 tests
- Radon levels in Beckham CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 5 tests
- Radon levels in Harmon CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Kiowa CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Greer County, Cities and towns
Cities and towns in Greer County
About 5,373 people live in Greer County by the Census Bureau's estimate for July 1, 2025, 120 fewer than in 2020 (−2.2%). Spread over its land, that is 8.4 people to the square mile. Its largest town, Mangum, has 2,683 residents, 49.9% of the total. Together its 3 incorporated places hold 82.0% of those residents; the other 18.0% live outside any of them. CDC publishes no radon test count for Greer County; across Oklahoma its counts for 2006 to 2015 come to 0.2 tests for every 1,000 residents (2025 estimate).
From Mangum to Willow, CDC publishes no figure by town: each reads Greer County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Mangum | 2,683 | −3.1% | 49.9% |
| Granite | 1,609 | −1.0% | 29.9% |
| Willow | 115 | −2.5% | 2.1% |
3 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).
Greer County, Homes
Homes in Greer County
Greer County is a place of houses on their own lots: 88% of its 2,614 homes are detached single-family houses, against 73% across Oklahoma. The homes are older than Oklahoma's as a whole: half were built before 1964 (1980 for Oklahoma), and 43% date from before 1960. Owners live in 78% of the occupied homes (Oklahoma: 66%), so for most households a test and a fix are their own to order.
| Homes | Greer County | Oklahoma |
|---|---|---|
| Housing units | 2,614 | 1,763,036 |
| Detached houses | 88% | 73% |
| In buildings of 5 or more | 1% | 12% |
| Mobile homes | 6% | 9% |
| Built before 1960 | 43% | 21% |
| Built since 2000 | 10% | 25% |
| Middle year built | 1964 | 1980 |
| Owner-occupied | 78% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.