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 Ellis County, Oklahoma
EPA puts Ellis County in Zone 2, its middle 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, 139 miles
- Oklahoma
- 8.9%
- Oklahoma
- 12.6%
Share at 4+ pCi/L, 135 tests, 2006 to 2015
Ground above low
79.4%
64.2 pts above Oklahoma
- Ellis
- 79.4%
- 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 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Read a result for Ellis 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
Ellis County, At a glance
Ellis County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Ellis 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
No CDC test figures here
CDC has published no radon test figures for Ellis County. Oklahoma County, 139 miles away, is the nearest county with a figure over the 2006 to 2015 laboratory totals.
Ellis County, Compared
Ellis County radon figures, compared
Calculated by Radon411CDC's county radon counts over the 2006 to 2015 laboratory totals cover 53 Oklahoma counties, and Ellis 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 (139 miles away) at 8.9%, Tulsa County (213 miles away) at 6.0% and Washington County (217 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 Ellis 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.
Ellis County, Geology
The ground under Ellis County
PredictedMost of the ground under Ellis County is one class on USGS's geologic map: 79.4% of its land is moderate radon potential, with 20.6% low. The map puts 79.4% of Ellis County in the area it calls High Plains and 20.6% in Central Oklahoma Plains and Hills. USGS gives the first a radon index of 9, in the moderate band (9 to 11), and the second 7, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| High Plains | Tertiary sandstone, siltstone, shale. | Moderate | 9 | 79.4% |
| 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 | 20.6% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Ellis County beside the ground around it
Across Oklahoma 0.6% of the land is rated high; none of Ellis County's is. Of the 7 counties that border it, 3 have more moderate-potential ground, Hemphill County, TX the most at 100%.
The map rates the ground, not the air in any home.
Local help
Ellis County, Local resources
Radon testing and mitigation in Ellis 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
Ellis County, Questions
Questions about radon in Ellis County
Are radon levels high in Ellis County?
No CDC testing statistics are published here for Ellis County, Oklahoma yet. Of the 5 nearest counties with a figure, within 277 miles, the share of tests at or above 4 pCi/L runs from 6.0% to 44.7%.
Which counties border Ellis County?
Ellis County borders 7 counties: Lipscomb County, TX, Woodward County, OK, Roger Mills County, OK, Harper County, OK, Hemphill County, TX, Dewey County, OK and Beaver County, OK.
Products
Ellis County, Products
Testing a home in Ellis County
No CDC figure names Ellis County; the nearest county with one, Oklahoma County (139 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 Ellis 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
MonitorX-Sense
XR0A-SR battery digital radon detector with a 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
Ellis County, Bordering counties
Counties bordering Ellis County
Calculated by Radon411- Radon levels in Lipscomb County, TXEPA zone 2
100.0%at or above 4 pCi/L
Median 7.3 pCi/L · 1 test
- Radon levels in Dewey County, OKEPA zone 3
33.3%at or above 4 pCi/L
Median 3.3 pCi/L · 6 tests
- Radon levels in Roger Mills County, OKEPA zone 3
0.0%at or above 4 pCi/L
Median 3.2 pCi/L · 1 test
- Radon levels in Hemphill County, TXEPA zone 2
0.0%at or above 4 pCi/L
Median 3.9 pCi/L · 1 test
- Radon levels in Beaver County, OKEPA zone 2
0.0%at or above 4 pCi/L
Median 0.1 pCi/L · 1 test
- Radon levels in Woodward County, OKEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
- Radon levels in Harper County, OKEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Ellis County, Cities and towns
Cities and towns in Ellis County
About 3,613 people live in Ellis County by the Census Bureau's estimate for July 1, 2025, 129 fewer than in 2020 (−3.4%). Spread over its land, that is 2.9 people to the square mile. Its largest town, Shattuck, has 1,194 residents, 33.0% of the total. Together its 4 incorporated places hold 66.3% of those residents; the other 33.7% live outside any of them. CDC publishes no radon test count for Ellis County; across Oklahoma its counts for 2006 to 2015 come to 0.2 tests for every 1,000 residents (2025 estimate).
From Shattuck to Fargo, CDC publishes no figure by town: each reads Ellis County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Shattuck | 1,194 | −4.3% | 33.0% |
| Arnett | 483 | −4.0% | 13.4% |
| Gage | 416 | −3.9% | 11.5% |
| Fargo | 303 | −2.6% | 8.4% |
4 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).
Ellis County, Homes
Homes in Ellis County
Ellis County is a place of houses on their own lots: 86% of its 2,125 homes are detached single-family houses, against 73% across Oklahoma. The homes are older than Oklahoma's as a whole: half were built before 1968 (1980 for Oklahoma), and 43% date from before 1960. Owners live in 82% of the occupied homes (Oklahoma: 66%), so for most households a test and a fix are their own to order.
| Homes | Ellis County | Oklahoma |
|---|---|---|
| Housing units | 2,125 | 1,763,036 |
| Detached houses | 86% | 73% |
| In buildings of 5 or more | 1% | 12% |
| Mobile homes | 13% | 9% |
| Built before 1960 | 43% | 21% |
| Built since 2000 | 10% | 25% |
| Middle year built | 1968 | 1980 |
| Owner-occupied | 82% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.