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 Greeley County, Nebraska
EPA puts Greeley County in Zone 1, its highest 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
32.0%
18.5 pts below NE
- Greeley
- 32.0%
- Nebraska
- 50.5%
75 tests, 2014
Median result
3.1pCi/L
Below action level
- Greeley
- 3.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2014
Tests reported
75
53rd of 69 by tests
- Greeley
- 75
- Douglas
- 18,288
Reported to CDC before any fix, 2014
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
61 of 69
Lowest quarter
- Greeley
- 32.0%
- Clay
- 81.6%
By share, of 69 with 30+ tests
Read a result for Greeley County
Starts at Greeley County's median, 3.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.1 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. Greeley County's median reported result, 2014.
The data
Greeley County, At a glance
Greeley County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Greeley County in
USGS geologic potential: High across 81% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Greeley County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 32.0% |
| 2015 | 33.3% |
| 2016 | 33.3% |
| 2017 | 57.1% |
| 2018 | 38.5% |
| 2019 | 61.5% |
| 2020 | 45.5% |
| 2021 | 60.0% |
| 2023 | 50.0% |
2023: 50.0%. Across these years the share ran from 32.0% to 61.5%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 6 tests were reported to CDC for Greeley 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).
Greeley County, Compared
Greeley County radon figures, compared
Calculated by Radon411In Greeley County, about 3 in 10 reported tests in 2014 (24 of 75) were at or above EPA's action level. Against the national pool of 34.9%, the gap is 2.9 points lower. Across 85 Nebraska counties pooled together, 50.5% of tests reached that level, so Greeley County runs 18.5 points below its state.
The newest figure, in 2023, counts only 6 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 75-test figure.
Of 4 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 21.4% (Howard County) to 65.0% (Nance County). By share, Greeley County is 61st of 69 Nebraska counties with 30 or more tests for the same period.
Year by year, 2014 opened at 32.0% and 2020 closed at 45.5% (up 13.5 points), with 2019 the high at 61.5%. Half the tests came in under 3.1 pCi/L and half over it; the single highest reached 12.3 pCi/L. Below the action level, 21 tests (28.0%) came in under 2 pCi/L, against 23.6% statewide, and 30 tests (40.0%) fell between 2 and 4, against 25.8% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 32.0% share point the same way here. USGS geology rates 81% of the county's land high radon potential.
The busiest year on file was 2014, with 75 tests reported; the quietest, 2023, had 6.
Greeley CountyNebraska, pooled
| Year | Tests | Greeley County, at or above 4 pCi/L | Nebraska, pooled |
|---|---|---|---|
| 2014 | 75 | 32.0% | 50.5% |
| 2017 | 42 | 57.1% | 47.7% |
| 2018 | 39 | 38.5% | 44.5% |
| 2019 | 39 | 61.5% | 44.3% |
| 2020 | 33 | 45.5% | 42.2% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Greeley County, Geology
The ground under Greeley County
PredictedMost of the ground under Greeley County is one class on USGS's geologic map: 81.3% of its land is high radon potential, with 5.2% moderate and 13.5% low. The map puts 81.3% of Greeley County in the area it calls Pre-Wisconsin glacial deposits and 13.5% in Sand Hills, with one smaller area beside them. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Pre-Wisconsin glacial deposits | Loess-mantled glacial drift. | High | 13 | 81.3% |
| Sand Hills | Quaternary windblown sand. | Low | 8 | 13.5% |
| Loess over Tertiary sediments | Tertiary bedrock covered by varying thicknesses of loess. | Moderate | 11 | 5.2% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Greeley County beside the ground around it
Greeley County has more high-potential ground than Nebraska as a whole: 81.3% of its land against 40.9%. Of the 6 counties that border it, 1 has more high-potential ground, Boone County the most at 92.7%.
The map rates the ground, not the air in any home.
Local help
Greeley County, Local resources
Radon testing and mitigation in Greeley 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
Greeley County, Questions
Questions about radon in Greeley County
Are radon levels high in Greeley County?
In 2023, 50.0% of the radon tests reported to CDC for Greeley County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.2 pCi/L. Of 69 Nebraska counties with 30 or more tests for the same period, 60 reported a higher share; pooled, the state comes to 50.5%.
Which counties border Greeley County?
Greeley County borders 6 counties: Wheeler County, Boone County, Valley County, Howard County, Nance County and Sherman County.
Products
Greeley County, Products
Testing a home in Greeley County
In Greeley County, 32.0% of 75 tests reported to CDC in 2014 reached 4 pCi/L, against 50.5% pooled across Nebraska. In Zone 1 the year-round level in Greeley 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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 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
Greeley County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Greeley County
Explore
Greeley County, Bordering counties
Counties bordering Greeley County
Calculated by Radon411- Radon levels in Nance CountyEPA zone 1
65.0%at or above 4 pCi/L
Median 6.3 pCi/L · 60 tests · 33.0 points above Greeley County
- Radon levels in Boone CountyEPA zone 1
62.5%at or above 4 pCi/L
Median 5.5 pCi/L · 72 tests · 30.5 points above Greeley County
- Radon levels in Sherman CountyEPA zone 2
60.0%at or above 4 pCi/L
Median 5.0 pCi/L · 60 tests · 28.0 points above Greeley County
- Radon levels in Valley CountyEPA zone 2
33.3%at or above 4 pCi/L
Median 2.7 pCi/L · 18 tests · 1.3 points above Greeley County
- Radon levels in Howard CountyEPA zone 2
21.4%at or above 4 pCi/L
Median 2.2 pCi/L · 84 tests · 10.6 points below Greeley County
- Radon levels in Wheeler CountyEPA zone 3
No CDC figure for 2014; its page reads it against its own neighbours.
Greeley County, Cities and towns
Cities and towns in Greeley County
About 2,154 people live in Greeley County by the Census Bureau's estimate for July 1, 2025, 29 fewer than in 2020 (−1.3%). Spread over its land, that is 3.8 people to the square mile. No town dominates: Spalding, the largest, has 411 residents, 19.1% of the total. Together its 4 incorporated places hold 61.2% of those residents; the other 38.8% live outside any of them. CDC's 75 reported tests for 2014 work out to 34.8 per 1,000 residents (2025 estimate), close to Nebraska's 28.0.
From Spalding to Wolbach, CDC publishes no figure by town: each reads Greeley County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Spalding | 411 | +1.0% | 19.1% |
| Greeley Center | 386 | −2.8% | 17.9% |
| Scotia | 284 | −4.4% | 13.2% |
| Wolbach | 237 | +2.6% | 11.0% |
4 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).
Greeley County, Homes
Homes in Greeley County
Greeley County is a place of houses on their own lots: 87% of its 1,202 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 58% date from before 1960. Owners live in 82% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.
| Homes | Greeley County | Nebraska |
|---|---|---|
| Housing units | 1,202 | 855,631 |
| Detached houses | 87% | 72% |
| In buildings of 5 or more | 2% | 17% |
| Mobile homes | 6% | 3% |
| Built before 1960 | 58% | 32% |
| Built since 2000 | 8% | 22% |
| Middle year built | 1947 | 1975 |
| Owner-occupied | 82% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.