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
Locations and reports
Radon Levels in Thayer County, Nebraska
EPA puts Thayer County in Zone 1, its highest radon zone, and only 15 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
68.9%
24.4 pts above NE
- Thayer
- 68.9%
- Nebraska
- 44.5%
183 tests, 2018
Median result
7.0pCi/L
Action level reached
- Thayer
- 7.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2018
Tests reported
183
40th of 73 by tests
- Thayer
- 183
- Lancaster
- 17,193
Reported to CDC before any fix, 2018
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in Nebraska
12 of 73
Top quarter
- Thayer
- 68.9%
- Colfax
- 74.1%
By share, of 73 with 30+ tests
Read a result for Thayer County
Starts at Thayer County's median, 7.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 7.0 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. Thayer County's median reported result, 2018.
The data
Thayer County, At a glance
Thayer County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Thayer County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Thayer County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 42.1% |
| 2015 | 75.0% |
| 2016 | 52.4% |
| 2017 | 68.3% |
| 2018 | 68.9% |
| 2019 | 66.7% |
| 2020 | 71.4% |
| 2021 | 64.5% |
| 2022 | 31.6% |
| 2023 | 60.0% |
2023: 60.0%. Across these years the share ran from 31.6% to 75.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 15 tests were reported to CDC for Thayer County over 2023, 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: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Thayer County, Compared
Thayer County radon figures, compared
Calculated by Radon411More than half: 68.9% of the 183 radon tests reported to CDC for Thayer County in 2018 read at least 4 pCi/L. That places it 12th of 73 Nebraska counties with 30 or more tests for the same period. That is 24.4 points above the 44.5% pooled from 85 Nebraska counties.
The newest figure, in 2023, counts only 15 tests (60.0% at or above 4 pCi/L), too few to compare, so this reading uses the 183-test figure.
The median result, 7.0 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 28.0 pCi/L. The rest split 13.1% under 2 pCi/L and 18.0% from 2 to 4 (Nebraska: 30.7% and 24.8%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 68.9% share point the same way here.
1 of its 6 bordering counties with figures ran higher, led by Nuckolls County at 71.7%; Saline County reported 52.3%. Statewide for the same period, Colfax County reported the highest share (74.1%) and Cherry County the lowest (10.0%).
The busiest year on file was 2018, with 183 tests reported; the quietest, 2023, had 15.
Over 8 years of annual figures the share rose 22.4 points, from 42.1% in 2014 to 64.5% in 2021; its peak was 75.0% in 2015. Nationally, every county with a figure for the same period pools to 29.1%; Thayer County sits 39.8 points above it. CDC also counts 18 tests taken after mitigation in Thayer County for the same period: tests in homes where a fix was already in.
Thayer CountyNebraska, pooled
64.5% % of tests34.9% % of tests
| Year | Tests | Thayer County, at or above 4 pCi/L | Nebraska, pooled |
|---|---|---|---|
| 2014 | 57 | 42.1% | 50.5% |
| 2015 | 168 | 75.0% | 53.3% |
| 2016 | 126 | 52.4% | 47.4% |
| 2017 | 123 | 68.3% | 47.7% |
| 2018 | 183 | 68.9% | 44.5% |
| 2019 | 81 | 66.7% | 44.3% |
| 2020 | 63 | 71.4% | 42.2% |
| 2021 | 93 | 64.5% | 34.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Thayer County, Geology
The ground under Thayer County
PredictedUSGS's geologic map puts all of Thayer County's mapped land in one class: high radon potential. All of it lies in the area the map calls Pre-Wisconsin glacial deposits, to which USGS gives a radon index of 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Pre-Wisconsin glacial deposits | Loess-mantled glacial drift. | High | 13 | 99.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Thayer County beside the ground around it
Thayer County has more high-potential ground than Nebraska as a whole: 100% of its land against 40.9%. Of the 6 counties that border it, none has as large a share of high-potential ground; Fillmore County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Thayer County, Local resources
Radon testing and mitigation in Thayer 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
Thayer County, Questions
Questions about radon in Thayer County
Are radon levels high in Thayer County?
In 2023, 60.0% of the radon tests reported to CDC for Thayer County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.8 pCi/L. Of 73 Nebraska counties with 30 or more tests for the same period, 11 reported a higher share; pooled, the state comes to 44.5%.
Which counties border Thayer County?
Thayer County borders 6 counties: Nuckolls County, NE, Jefferson County, NE, Fillmore County, NE, Republic County, KS, Washington County, KS and Saline County, NE.
Products
Thayer County, Products
Testing a home in Thayer County
In Thayer County, 68.9% of 183 tests reported to CDC in 2018 reached 4 pCi/L, against 44.5% pooled across Nebraska. In Zone 1 the year-round level in Thayer 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 monitors3
See every kit and monitor
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
Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Thayer County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Thayer County
Explore
Thayer County, Bordering counties
Counties bordering Thayer County
Calculated by Radon411- Radon levels in Nuckolls County, NEEPA zone 1
71.7%at or above 4 pCi/L
Median 8.0 pCi/L · 180 tests · 2.8 points above Thayer County
- Radon levels in Jefferson County, NEEPA zone 1
64.8%at or above 4 pCi/L
Median 5.1 pCi/L · 213 tests · 4.1 points below Thayer County
- Radon levels in Fillmore County, NEEPA zone 1
64.7%at or above 4 pCi/L
Median 6.1 pCi/L · 153 tests · 4.2 points below Thayer County
- Radon levels in Washington County, KSEPA zone 1
61.8%at or above 4 pCi/L
Median 6.0 pCi/L · 55 tests · 7.1 points below Thayer County
- Radon levels in Republic County, KSEPA zone 1
59.0%at or above 4 pCi/L
Median 5.8 pCi/L · 39 tests · 9.9 points below Thayer County
- Radon levels in Saline County, NEEPA zone 1
52.3%at or above 4 pCi/L
Median 4.4 pCi/L · 333 tests · 16.6 points below Thayer County
Thayer County, Cities and towns
Cities and towns in Thayer County
About 4,842 people live in Thayer County by the Census Bureau's estimate for July 1, 2025, 180 fewer than in 2020 (−3.6%). Spread over its land, that is 8.4 people to the square mile. Its largest town, Hebron, has 1,384 residents, 28.6% of the total. Together its 11 incorporated places hold 70.0% of those residents; the other 30.0% live outside any of them. CDC's 183 reported tests for 2018 work out to 37.8 per 1,000 residents (2025 estimate), close to Nebraska's 31.1.
From Hebron to Gilead, CDC publishes no figure by town: each reads Thayer County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hebron | 1,384 | −4.7% | 28.6% |
| Deshler | 739 | −1.2% | 15.3% |
| Davenport | 307 | −3.5% | 6.3% |
| Bruning | 282 | −3.4% | 5.8% |
| Chester | 212 | −4.1% | 4.4% |
| Alexandria | 140 | −3.4% | 2.9% |
| Carleton | 90 | −4.3% | 1.9% |
| Byron | 86 | −4.4% | 1.8% |
| Hubbell | 66 | −4.3% | 1.4% |
| Belvidere | 54 | −3.6% | 1.1% |
| Gilead | 30 | −3.2% | 0.6% |
11 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).
Thayer County, Homes
Homes in Thayer County
Thayer County is a place of houses on their own lots: 93% of its 2,518 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1952 (1975 for Nebraska), and 59% date from before 1960. Owners live in 76% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.
| Homes | Thayer County | Nebraska |
|---|---|---|
| Housing units | 2,518 | 855,631 |
| Detached houses | 93% | 72% |
| In buildings of 5 or more | 4% | 17% |
| Mobile homes | 1% | 3% |
| Built before 1960 | 59% | 32% |
| Built since 2000 | 6% | 22% |
| Middle year built | 1952 | 1975 |
| Owner-occupied | 76% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.