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 Major County, Oklahoma
EPA puts Major County in Zone 3, its lowest radon zone, and only 4 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
Nearest county
8.9%
Oklahoma County, 82 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
- Major
- 0.0%
- Oklahoma
- 15.2%
Share of land USGS rates moderate or high potential
Tests reported
4
Too few for a share
- Major
- 4
- Needed
- 30
2008 to 2017, laboratory
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 Major 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
Major County, At a glance
Major 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
Radon tests reported for Major County, 2008 to 2017, laboratory
CDC holds 4 reported tests for Major 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). Major County beside the counties around it is how this page reads it.
What these figures count
Only 4 tests were reported to CDC for Major 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: 2006 to 2017 (every CDC figure on file).
Major County, Compared
Major County radon figures, compared
Calculated by Radon411CDC's largest figure for Major County rests on 4 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 25.0 points and no rank or comparison is drawn from it. Results reached as high as 2.7 pCi/L, with a middle value of 2.2 pCi/L.
The nearest counties with a figure are Oklahoma County (82 miles away) at 8.9%, Tulsa County (146 miles away) at 6.0% and Washington County (149 miles away) at 11.3%. 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 Major 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.
Major County, Geology
The ground under Major County
PredictedUSGS's geologic map puts all of Major County's mapped land in one class: low radon potential. All of it lies in the area the map calls Central Oklahoma Plains and Hills, to which USGS gives a radon index of 7, 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Major County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Major County's is. Of the 7 counties that border it, 2 have more moderate-potential ground, Woodward County the most at 19.9%.
The map rates the ground, not the air in any home.
Local help
Major County, Local resources
Radon testing and mitigation in Major 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
Major County, Questions
Questions about radon in Major County
Are radon levels high in Major County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Major County, Oklahoma were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.2 pCi/L. Of the 5 nearest counties with a figure, within 208 miles, the share of tests at or above 4 pCi/L runs from 6.0% to 44.7%.
Which counties border Major County?
Major County borders 7 counties: Woods County, Blaine County, Alfalfa County, Dewey County, Kingfisher County, Garfield County and Woodward County.
Products
Major County, Products
Testing a home in Major County
No CDC figure names Major County; the nearest county with one, Oklahoma County (82 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 Major 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
Hello Radon C battery radon monitor with an e-ink screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Major County, Bordering counties
Counties bordering Major County
Calculated by Radon411- Radon levels in Alfalfa CountyEPA zone 3
100.0%at or above 4 pCi/L
Median 29.3 pCi/L · 1 test
- Radon levels in Dewey CountyEPA zone 3
33.3%at or above 4 pCi/L
Median 3.3 pCi/L · 6 tests
- Radon levels in Woods CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.8 pCi/L · 1 test
- Radon levels in Kingfisher CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.6 pCi/L · 1 test
- Radon levels in Garfield CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 2.0 pCi/L · 7 tests
- Radon levels in Blaine CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Woodward CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Major County, Cities and towns
Cities and towns in Major County
About 7,536 people live in Major County by the Census Bureau's estimate for July 1, 2025, 211 fewer than in 2020 (−2.7%). Spread over its land, that is 7.9 people to the square mile. Its largest town, Fairview, has 2,632 residents, 34.9% of the total. Testing is reported here more often than across the state: CDC's 4 reported tests for 2008 to 2017 come to 0.5 for every 1,000 residents (2025 estimate), against 0.2 for Oklahoma.
From Fairview to Meno, CDC publishes no figure by town: each reads Major County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Fairview | 2,632 | −3.6% | 34.9% |
| Seilingextends beyond Major County | 800 | −5.7% | Counted whole |
| Ringwood | 395 | +0.3% | 5.2% |
| Cleo Springs | 276 | −2.1% | 3.7% |
| Ames | 189 | −2.6% | 2.5% |
| Meno | 188 | −2.1% | 2.5% |
6 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). A place that extends beyond Major County is counted whole, so it has no share.
Major County, Homes
Homes in Major County
Major County is a place of houses on their own lots: 80% of its 3,713 homes are detached single-family houses, against 73% across Oklahoma. Half of its homes were built before 1975, close to Oklahoma's 1980: 32% date from before 1960 and 19% from 2000 or later. Owners live in 80% of the occupied homes (Oklahoma: 66%), so for most households a test and a fix are their own to order.
| Homes | Major County | Oklahoma |
|---|---|---|
| Housing units | 3,713 | 1,763,036 |
| Detached houses | 80% | 73% |
| In buildings of 5 or more | 2% | 12% |
| Mobile homes | 13% | 9% |
| Built before 1960 | 32% | 21% |
| Built since 2000 | 19% | 25% |
| Middle year built | 1975 | 1980 |
| Owner-occupied | 80% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.