Short-term kit
Air Chek Short-Term radon test kit you hang, lab fee included
- Lab fee included
In home: 72 to 168 hours
Locations and reports
Radon Levels in Garden County, Nebraska
EPA puts Garden County in Zone 3, its lowest radon zone, and only 6 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
37.5%
21.0 pts below NE
- Garden
- 37.5%
- Nebraska
- 58.5%
56 tests, 2008 to 2017
Median result
3.5pCi/L
Below action level
- Garden
- 3.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
56
68th of 77 by tests
- Garden
- 56
- Douglas
- 8,556
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in Nebraska
70 of 77
Lowest quarter
- Garden
- 37.5%
- Clay
- 85.1%
By share, of 77 with 30+ tests
Read a result for Garden County
Starts at Garden County's median, 3.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.5 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Garden County's median reported result, 2008 to 2017.
The data
Garden County, At a glance
Garden County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 75% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Garden County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 22.2% |
| 2015 | 44.4% |
| 2016 | 66.7% |
| 2017 | 33.3% |
| 2018 | 46.2% |
| 2019 | 10.0% |
| 2020 | 0.0% |
| 2021 | 25.0% |
| 2022 | 50.0% |
| 2023 | 66.7% |
2023: 66.7%. Across these years the share ran from 0.0% to 66.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 6 tests were reported to CDC for Garden 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).
Garden County, Compared
Garden County radon figures, compared
Calculated by Radon411In Garden County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (21 of 56) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 1.8 points higher. Across 93 Nebraska counties pooled together, 58.5% of tests reached that level, so Garden County runs 21.0 points below its state.
The newest figure, in 2023, counts only 6 tests (66.7% at or above 4 pCi/L), too few to compare, so this reading uses the 56-test figure.
Of 5 neighbours with a figure, 4 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 34.6% (Sheridan County) to 55.0% (Keith County). By share, Garden County is 70th of 77 Nebraska counties with 30 or more tests for the same period.
Half the tests came in under 3.5 pCi/L and half over it; the single highest reached 11.4 pCi/L. Below the action level, 19 tests (33.9%) came in under 2 pCi/L, against 18.6% statewide, and 16 tests (28.6%) fell between 2 and 4, against 22.8% statewide.
The reported tests do not follow EPA's Zone 3 label for Garden County (predicted average under 2 pCi/L): 37.5% of them reached 4 pCi/L, more than a low-potential zone suggests. USGS geology rates 75% of the county's land low radon potential.
The busiest year on file was 2018, with 39 tests reported; the quietest, 2022, had 2.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Garden County, Geology
The ground under Garden County
PredictedMost of the ground under Garden County is one class on USGS's geologic map: 75.0% of its land is low radon potential, with 25.0% moderate. The map puts 75.0% of Garden County in the area it calls Sand Hills and 25.0% in Tertiary Rocks. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Sand Hills | Quaternary windblown sand. | Low | 8 | 75.0% |
| Tertiary Rocks | Tertiary sandstone, siltstone, and volcanic ash. | Moderate | 11 | 25.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Garden County beside the ground around it
Across Nebraska 40.9% of the land is rated high; none of Garden County's is. Of the 7 counties that border it, 3 have more high-potential ground, Deuel County the most at 2.0%.
The map rates the ground, not the air in any home.
Local help
Garden County, Local resources
Radon testing and mitigation in Garden 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
Garden County, Questions
Questions about radon in Garden County
Are radon levels high in Garden County?
In 2023, 66.7% of the radon tests reported to CDC for Garden County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.5 pCi/L. Of 77 Nebraska counties with 30 or more tests for the same period, 69 reported a higher share; pooled, the state comes to 58.5%.
Which counties border Garden County?
Garden County borders 7 counties: Deuel County, Arthur County, Grant County, Morrill County, Keith County, Cheyenne County and Sheridan County.
Products
Garden County, Products
Testing a home in Garden County
In Garden County, 37.5% of 56 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 58.5% pooled across Nebraska. 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 Garden County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Monitor
RadonScan USB-powered radon monitor with a color screen
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 5 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Garden County, Bordering counties
Counties bordering Garden County
Calculated by Radon411- Radon levels in Keith CountyEPA zone 2
55.0%at or above 4 pCi/L
Median 4.3 pCi/L · 120 tests · 17.5 points above Garden County
- Radon levels in Cheyenne CountyEPA zone 2
53.4%at or above 4 pCi/L
Median 4.1 pCi/L · 292 tests · 15.9 points above Garden County
- Radon levels in Deuel CountyEPA zone 2
42.9%at or above 4 pCi/L
Median 3.5 pCi/L · 49 tests · 5.4 points above Garden County
- Radon levels in Morrill CountyEPA zone 2
42.9%at or above 4 pCi/L
Median 3.3 pCi/L · 56 tests · 5.4 points above Garden County
- Radon levels in Sheridan CountyEPA zone 2
34.6%at or above 4 pCi/L
Median 2.9 pCi/L · 107 tests · 2.9 points below Garden County
- Radon levels in Arthur CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 1.5 pCi/L · 9 tests · 37.5 points below Garden County
- Radon levels in Grant CountyEPA zone 3
0.0%at or above 4 pCi/L
Median 0.5 pCi/L · 4 tests · 37.5 points below Garden County
Garden County, Cities and towns
Cities and towns in Garden County
About 1,804 people live in Garden County by the Census Bureau's estimate for July 1, 2025, 85 fewer than in 2020 (−4.5%). Spread over its land, that is 1.1 people to the square mile. Its largest town, Oshkosh, has 775 residents, 43.0% of the total. Together its 2 incorporated places hold 52.3% of those residents; the other 47.7% live outside any of them. CDC's 56 reported tests for 2008 to 2017 work out to 31.0 per 1,000 residents (2025 estimate), close to Nebraska's 21.2.
From Oshkosh to Lewellen, CDC publishes no figure by town: each reads Garden County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Oshkosh | 775 | −4.7% | 43.0% |
| Lewellen | 168 | −6.1% | 9.3% |
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).
Garden County, Homes
Homes in Garden County
Garden County is a place of houses on their own lots: 90% of its 1,163 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1953 (1975 for Nebraska), and 59% date from before 1960. Owners live in 78% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.
| Homes | Garden County | Nebraska |
|---|---|---|
| Housing units | 1,163 | 855,631 |
| Detached houses | 90% | 72% |
| In buildings of 5 or more | 2% | 17% |
| Mobile homes | 7% | 3% |
| Built before 1960 | 59% | 32% |
| Built since 2000 | 9% | 22% |
| Middle year built | 1953 | 1975 |
| Owner-occupied | 78% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.