Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
Locations and reports
Radon Levels in Thomas County, Nebraska
EPA puts Thomas County in Zone 3, its lowest radon zone, and only 1 radon test from it is 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
13.3%
Cherry County
- Cherry
- 13.3%
1 of 5 neighbours have 30+ tests, 2008 to 2017
Nearest county
41.9%
Brown County, 48 miles
- Brown
- 41.9%
- Nebraska
- 58.5%
Share at 4+ pCi/L, 62 tests, 2008 to 2017
Ground above low
None
71.8 pts below Nebraska
- Thomas
- 0.0%
- Nebraska
- 71.8%
Share of land USGS rates moderate or high potential
Tests reported
10
Too few for a share
- Thomas
- 10
- Needed
- 30
2007 to 2016, 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 Thomas 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
Thomas County, At a glance
Thomas 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 Thomas County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2021 | 0.0% |
| 2022 | 0.0% |
2022: 0.0%. Across these years the share ran from 0.0% to 0.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Thomas 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: 2005 to 2022 (every CDC figure on file).
Thomas County, Compared
Thomas County radon figures, compared
Calculated by Radon411CDC's largest figure for Thomas County rests on 10 tests over the 2007 to 2016 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 10.0 points and no rank or comparison is drawn from it. Results reached as high as 5.7 pCi/L, with a middle value of 0.9 pCi/L.
Cherry County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 13.3% of its tests at or above 4 pCi/L. Farther out, Brown County (48 miles away) at 41.9%, Custer County (56 miles away) at 52.3% and Lincoln County (61 miles away) at 27.0% have figures too. Pooled across 93 Nebraska counties, 58.5% of reported tests reached that level; across every county in the country with a figure, 35.7%.
Statewide for the same period, Clay County reported the highest share (85.1%) and Cherry County the lowest (13.3%). EPA's 1993 map puts Thomas 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.
Thomas County, Geology
The ground under Thomas County
PredictedUSGS's geologic map puts all of Thomas County's mapped land in one class: low radon potential. All of it lies in the area the map calls Sand Hills, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Sand Hills | Quaternary windblown sand. | Low | 8 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Thomas County beside the ground around it
Across Nebraska 40.9% of the land is rated high; none of Thomas County's is. Of the 5 counties that border it, 3 have more moderate-potential ground, Logan County the most at 33.6%.
The map rates the ground, not the air in any home.
Local help
Thomas County, Local resources
Radon testing and mitigation in Thomas County
- Office of Environmental Health Hazards & Indoor AirOffice of Environmental Health Hazards & Indoor Air, run by Nebraska Department of Health and Human Services, licenses or certifies radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in Nebraska.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Some local programs distribute radon kits for free or a reduced cost.
- Compare kits
- Professionals in Nebraska116 professionals are listed in Nebraska.
What Nebraska's program says
- Phone
- (402) 471-1005
- Licensing of radon professionals
If radon testing is done in schools, offices, or other places of work, it must be done by a licensed radon measurement business.
What it means
Thomas County, Questions
Questions about radon in Thomas County
Are radon levels high in Thomas County?
In 2022, 0.0% of the radon tests reported to CDC for Thomas County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.1 pCi/L. Cherry County, the one bordering county with a figure over the 2008 to 2017 laboratory totals, reported 13.3% of its tests at or above 4 pCi/L.
Which counties border Thomas County?
Thomas County borders 5 counties: Logan County, Blaine County, Hooker County, McPherson County and Cherry County.
Products
Thomas County, Products
Testing a home in Thomas County
No CDC figure names Thomas County; the nearest county with one, Brown County (48 miles away), reported 41.9% of its tests at or above 4 pCi/L over the 2008 to 2017 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 Thomas 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
RadonEye RD200 plug-in continuous radon monitor
- C-NRPP 2024/25: Approved
- Plug-in
- Bluetooth
- Alarm
- Screen, app
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
Thomas County, Bordering counties
Counties bordering Thomas County
Calculated by Radon411- Radon levels in Cherry CountyEPA zone 3
13.3%at or above 4 pCi/L
Median 1.7 pCi/L · 30 tests
- Radon levels in Logan CountyEPA zone 3
12.5%at or above 4 pCi/L
Median 2.3 pCi/L · 8 tests
- Radon levels in Blaine CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.7 pCi/L · 3 tests
- Radon levels in Hooker CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.8 pCi/L · 3 tests
- Radon levels in McPherson CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.0 pCi/L · 10 tests
Thomas County, Cities and towns
Cities and towns in Thomas County
About 639 people live in Thomas County by the Census Bureau's estimate for July 1, 2025, 32 fewer than in 2020 (−4.8%). Spread over its land, that is 0.9 people to the square mile. Its largest town, Thedford, has 200 residents, 31.3% of the total. CDC's 10 reported tests for 2007 to 2016 work out to 15.6 per 1,000 residents (2025 estimate), close to Nebraska's 20.2.
From Thedford to Halsey, CDC publishes no figure by town: each reads Thomas County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Thedford | 200 | −4.8% | 31.3% |
| Halseyextends beyond Thomas County | 62 | −6.1% | Counted whole |
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). A place that extends beyond Thomas County is counted whole, so it has no share.
Thomas County, Homes
Homes in Thomas County
Thomas County is a place of houses on their own lots: 94% of its 367 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1957 (1975 for Nebraska), and 53% date from before 1960. 70% of occupied homes are lived in by their owner (Nebraska: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Thomas County | Nebraska |
|---|---|---|
| Housing units | 367 | 855,631 |
| Detached houses | 94% | 72% |
| In buildings of 5 or more | 1% | 17% |
| Mobile homes | 3% | 3% |
| Built before 1960 | 53% | 32% |
| Built since 2000 | 11% | 22% |
| Middle year built | 1957 | 1975 |
| Owner-occupied | 70% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.