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 Nuckolls County, Nebraska
EPA puts Nuckolls County in Zone 1, its highest radon zone, and only 9 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
80.0%
21.4 pts above NE
- Nuckolls
- 80.0%
- Nebraska
- 58.6%
245 tests, 2007 to 2016
Median result
8.7pCi/L
Action level reached
- Nuckolls
- 8.7 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
245
37th of 76 by tests
- Nuckolls
- 245
- Douglas
- 8,778
Reported to CDC before any fix, 2007 to 2016
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
4 of 76
Top quarter
- Nuckolls
- 80.0%
- Clay
- 86.4%
By share, of 76 with 30+ tests
Read a result for Nuckolls County
Starts at Nuckolls County's median, 8.7 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 8.7 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. Nuckolls County's median reported result, 2007 to 2016.
The data
Nuckolls County, At a glance
Nuckolls County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Nuckolls 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 Nuckolls County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 71.4% |
| 2015 | 76.1% |
| 2016 | 64.3% |
| 2017 | 56.7% |
| 2018 | 71.7% |
| 2019 | 64.2% |
| 2020 | 72.0% |
| 2021 | 60.0% |
| 2022 | 53.8% |
| 2023 | 77.8% |
2023: 77.8%. Across these years the share ran from 53.8% to 77.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 9 tests were reported to CDC for Nuckolls 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).
Nuckolls County, Compared
Nuckolls County radon figures, compared
Calculated by Radon411More than half: 80.0% of the 245 radon tests reported to CDC for Nuckolls County over the 2007 to 2016 laboratory totals read at least 4 pCi/L. That places it 4th of 76 Nebraska counties with 30 or more tests for the same period. That is 21.4 points above the 58.6% pooled from 93 Nebraska counties.
The newest figure, in 2023, counts only 9 tests (77.8% at or above 4 pCi/L), too few to compare, so this reading uses the 245-test figure.
The median result, 8.7 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 63.4 pCi/L. The rest split 6.9% under 2 pCi/L and 13.1% from 2 to 4 (Nebraska: 18.6% and 22.8%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 80.0% share point the same way here.
2 of its 4 bordering counties with figures ran higher, led by Clay County at 86.4%; Thayer County reported 68.3%. Statewide for the same period, Clay County reported the highest share (86.4%) and Merrick County the lowest (26.3%).
The busiest year on file was 2015, with 201 tests reported; the quietest, 2023, had 9.
Over 8 years of annual figures the share fell 11.4 points, from 71.4% in 2014 to 60.0% in 2021; its peak was 76.1% in 2015. Nationally, every county with a figure for the same period pools to 35.8%; Nuckolls County sits 44.2 points above it. CDC also counts 17 tests taken after mitigation in Nuckolls County for the same period: tests in homes where a fix was already in.
Nuckolls CountyNebraska, pooled
60.0% % of tests34.9% % of tests
| Year | Tests | Nuckolls County, at or above 4 pCi/L | Nebraska, pooled |
|---|---|---|---|
| 2014 | 84 | 71.4% | 50.5% |
| 2015 | 201 | 76.1% | 53.3% |
| 2016 | 168 | 64.3% | 47.4% |
| 2017 | 90 | 56.7% | 47.7% |
| 2018 | 180 | 71.7% | 44.5% |
| 2019 | 159 | 64.2% | 44.3% |
| 2020 | 150 | 72.0% | 42.2% |
| 2021 | 60 | 60.0% | 34.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Nuckolls County, Geology
The ground under Nuckolls County
PredictedUSGS's geologic map puts all of Nuckolls 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 | 99.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Nuckolls County beside the ground around it
Nuckolls 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; Clay County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Nuckolls County, Local resources
Radon testing and mitigation in Nuckolls 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
Nuckolls County, Questions
Questions about radon in Nuckolls County
Are radon levels high in Nuckolls County?
In 2023, 77.8% of the radon tests reported to CDC for Nuckolls County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 10.1 pCi/L. Of 76 Nebraska counties with 30 or more tests for the same period, 3 reported a higher share; pooled, the state comes to 58.6%.
Which counties border Nuckolls County?
Nuckolls County borders 6 counties: Thayer County, NE, Webster County, NE, Clay County, NE, Jewell County, KS, Republic County, KS and Fillmore County, NE.
Products
Nuckolls County, Products
Testing a home in Nuckolls County
In Nuckolls County, 80.0% of 245 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 58.6% pooled across Nebraska. In Zone 1 the year-round level in Nuckolls 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
RadonScan-Plus USB-powered radon monitor with Wi-Fi
- C-NRPP 2024/25: Not included
- Plug-in
- Wi-Fi
- Alarm
- Screen, app
First reading: Within 5 minutes
Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Nuckolls County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Nuckolls County
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Nuckolls County, Bordering counties
Counties bordering Nuckolls County
Calculated by Radon411- Radon levels in Clay County, NEEPA zone 1
86.4%at or above 4 pCi/L
Median 8.7 pCi/L · 177 tests · 6.4 points above Nuckolls County
- Radon levels in Webster County, NEEPA zone 1
81.4%at or above 4 pCi/L
Median 7.5 pCi/L · 129 tests · 1.4 points above Nuckolls County
- Radon levels in Fillmore County, NEEPA zone 1
76.0%at or above 4 pCi/L
Median 6.8 pCi/L · 183 tests · 4.0 points below Nuckolls County
- Radon levels in Thayer County, NEEPA zone 1
68.3%at or above 4 pCi/L
Median 5.6 pCi/L · 104 tests · 11.7 points below Nuckolls County
- Radon levels in Jewell County, KSEPA zone 1
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
- Radon levels in Republic County, KSEPA zone 1
No CDC figure for 2007 to 2016; its page reads it against its own neighbours.
Nuckolls County, Cities and towns
Cities and towns in Nuckolls County
Nuckolls County's population has barely moved since 2020: 4,100 residents on July 1, 2025 against 4,093 then, by the Census Bureau's estimates. Spread over its land, that is 7.1 people to the square mile. Its largest town, Superior, has 1,821 residents, 44.4% of the total. Together its 7 incorporated places hold 69.0% of those residents; the other 31.0% live outside any of them. Testing is reported here more often than across the state: CDC's 245 reported tests for 2007 to 2016 come to 59.8 for every 1,000 residents (2025 estimate), against 20.2 for Nebraska.
From Superior to Nora, CDC publishes no figure by town: each reads Nuckolls County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Superior | 1,821 | +0.7% | 44.4% |
| Nelson | 462 | +0.4% | 11.3% |
| Lawrence | 275 | −0.7% | 6.7% |
| Ruskin | 108 | Level | 2.6% |
| Hardy | 92 | −1.1% | 2.2% |
| Oak | 50 | Level | 1.2% |
| Nora | 21 | Level | 0.5% |
7 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).
Nuckolls County, Homes
Homes in Nuckolls County
Nuckolls County is a place of houses on their own lots: 90% of its 2,218 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1947 (1975 for Nebraska), and 63% date from before 1960. Owners live in 81% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.
| Homes | Nuckolls County | Nebraska |
|---|---|---|
| Housing units | 2,218 | 855,631 |
| Detached houses | 90% | 72% |
| In buildings of 5 or more | 4% | 17% |
| Mobile homes | 2% | 3% |
| Built before 1960 | 63% | 32% |
| Built since 2000 | 6% | 22% |
| Middle year built | 1947 | 1975 |
| Owner-occupied | 81% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.