
Long-term kit![]()
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
EPA puts Rawlins County in Zone 1, its highest radon zone, and only 5 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
64.2%
Red Willow County
4 of 7 neighbours have 30+ tests, 2019
Nearest county
45.5%
Thomas County, 30 miles
Share at 4+ pCi/L, 44 tests, 2019
Ground above low
100.0%
Level with Kansas
Share of land USGS rates moderate or high potential
Tests reported
18
Too few for a share
2021
EPA radon zone
Zone 1
Highest potential
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Read a result for Rawlins County
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
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
Rawlins County, At a glance
Predicted: EPA radon zone
EPA puts all of Rawlins County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2016 | 66.7% |
| 2017 | 71.4% |
| 2018 | 100.0% |
| 2019 | 25.0% |
| 2020 | 100.0% |
| 2021 | 50.0% |
| 2022 | 80.0% |
2022: 80.0%. Across these years the share ran from 25.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
Only 5 tests were reported to CDC for Rawlins County over 2022, 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: 2022. Measured data period: 2016 to 2022 (every CDC figure on file).
Rawlins County, Compared
CDC's largest figure for Rawlins County rests on 18 tests in 2021, 9 of them at or above 4 pCi/L, so each test moves its share by 5.6 points and no rank or comparison is drawn from it. Results reached as high as 12.3 pCi/L, with a middle value of 3.8 pCi/L.
Of the counties bordering it, 4 have a figure in 2019: Red Willow County, NE reported the largest share at or above 4 pCi/L, 64.2%, and Thomas County the smallest, 45.5%, with Sherman County at 58.7% and Hitchcock County, NE at 46.2% between. Farther out, Scott County (90 miles away) at 61.5%, Phillips County (92 miles away) at 71.4% and Ellis County (112 miles away) at 41.6% have figures too. Pooled across 102 Kansas counties, 33.7% of reported tests reached that level; across every county in the country with a figure, 29.0%.
Statewide for the same period, Jewell County reported the highest share (71.9%) and Reno County the lowest (20.8%). EPA's 1993 map puts Rawlins County in Zone 1, the map's highest label: a predicted county average above 4 pCi/L. USGS geology rates 100% of the county's land high radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Rawlins County, Geology
USGS's geologic map puts all of Rawlins County's mapped land in one class: high radon potential. All of it lies in the area the map calls Ogallala Formation, to which USGS gives a radon index of 12, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Ogallala Formation | Tertiary sandstone, in part covered by windblown eolian sand and loess deposits. | High | 12 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Rawlins County has more high-potential ground than Kansas as a whole: 100% of its land against 59.9%. Of the 7 counties that border it, none has as large a share of high-potential ground; Decatur County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Rawlins County, Local resources
What it means
Rawlins County, Questions
In 2022, 80.0% of the radon tests reported to CDC for Rawlins County, Kansas were at or above 4 pCi/L, and the median reported pre-mitigation result was 9.3 pCi/L. Of the counties bordering it, 4 have a figure in 2019: Red Willow County, NE reported the largest share at or above 4 pCi/L, 64.2%, and Thomas County the smallest, 45.5%, with Sherman County at 58.7% and Hitchcock County, NE at 46.2% between.
Rawlins County borders 7 counties: Thomas County, KS, Decatur County, KS, Hitchcock County, NE, Cheyenne County, KS, Sherman County, KS, Dundy County, NE and Red Willow County, NE.
Products
Rawlins County, Products
No CDC figure names Rawlins County; the nearest county with one, Thomas County (30 miles away), reported 45.5% of its tests at or above 4 pCi/L in 2019, the only reading nearby until a test of this home. In Zone 1 the year-round level in Rawlins County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.
Test kits and monitors: 1 of 3
Rawlins County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Rawlins County
Explore
Rawlins County, Bordering counties
66.7%at or above 4 pCi/L
Median 5.0 pCi/L · 9 tests
64.2%at or above 4 pCi/L
Median 4.9 pCi/L · 159 tests
58.7%at or above 4 pCi/L
Median 4.6 pCi/L · 63 tests
46.2%at or above 4 pCi/L
Median 3.4 pCi/L · 39 tests
45.5%at or above 4 pCi/L
Median 3.8 pCi/L · 44 tests
25.0%at or above 4 pCi/L
Median 2.5 pCi/L · 12 tests
12.5%at or above 4 pCi/L
Median 1.4 pCi/L · 24 tests
Rawlins County, Cities and towns
Rawlins County has been losing residents: from 2,567 in 2020 to 2,431 on July 1, 2025, a fall of 5.3% by the Census Bureau's estimates. Spread over its land, that is 2.3 people to the square mile. Atwood alone is home to 1,229 of them, 50.6% of the total. Together its 3 incorporated places hold 60.0% of those residents; the other 40.0% live outside any of them. Reported testing is thin here: 18 tests over 2021, or 7.4 for every 1,000 residents (2025 estimate), where Kansas as a whole comes to 23.5.
From Atwood to Herndon, CDC publishes no figure by town: each reads Rawlins County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Atwood | 1,229 | −4.7% | 50.6% |
| McDonald | 115 | −1.7% | 4.7% |
| Herndon | 114 | −6.6% | 4.7% |
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).
Rawlins County, Homes
Rawlins County is a place of houses on their own lots: 79% of its 1,363 homes are detached single-family houses, against 72% across Kansas. The homes are older than Kansas' as a whole: half were built before 1956 (1975 for Kansas), and 55% date from before 1960. 69% of occupied homes are lived in by their owner (Kansas: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Rawlins County | Kansas |
|---|---|---|
| Housing units | 1,363 | 1,285,221 |
| Detached houses | 79% | 72% |
| In buildings of 5 or more | 1% | 13% |
| Mobile homes | 15% | 4% |
| Built before 1960 | 55% | 33% |
| Built since 2000 | 4% | 20% |
| Middle year built | 1956 | 1975 |
| Owner-occupied | 69% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.