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 Sarpy County, Nebraska
EPA puts Sarpy County in Zone 1, its highest radon zone, and high results are common there: 51.9% of the 755 radon tests reported to CDC (2023) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
51.9%
13.7 pts above NE
- Sarpy
- 51.9%
- Nebraska
- 38.2%
755 tests, 2023
Median result
4.1pCi/L
Action level reached
- Sarpy
- 4.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
755
3rd of 33 by tests
- Sarpy
- 755
- Lancaster
- 4,058
Reported to CDC before any fix, 2023
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
23 of 33
Middle half
- Sarpy
- 51.9%
- Gage
- 79.8%
By share, of 33 with 30+ tests
Read a result for Sarpy County
Starts at Sarpy County's median, 4.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.1 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. Sarpy County's median reported result, 2023.
The data
Sarpy County, At a glance
Sarpy County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Sarpy 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 Sarpy County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 53.7% |
| 2015 | 51.3% |
| 2016 | 46.4% |
| 2017 | 44.0% |
| 2018 | 50.1% |
| 2019 | 49.7% |
| 2020 | 46.0% |
| 2021 | 29.5% |
| 2022 | 46.7% |
| 2023 | 51.9% |
2023: 51.9%. Across these years the share ran from 29.5% to 53.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 755 tests reported to CDC for Sarpy County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).
Sarpy County, Compared
Sarpy County radon figures, compared
Calculated by Radon411More than half: 51.9% of the 755 radon tests reported to CDC for Sarpy County in 2023 read at least 4 pCi/L. That places it 23rd of 33 Nebraska counties with 30 or more tests for the same period. That is 13.7 points above the 38.2% pooled from 86 Nebraska counties.
The median result, 4.1 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 70.9 pCi/L. The rest split 20.4% under 2 pCi/L and 27.7% from 2 to 4 (Nebraska: 39.2% and 22.6%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 51.9% share point the same way here.
2 of its 3 bordering counties with figures ran higher, led by Saunders County at 73.2%; Douglas County reported 38.7%. Statewide for the same period, Gage County reported the highest share (79.8%) and Dakota County the lowest (3.1%).
The busiest year on file was 2016, with 8,469 tests reported; the quietest, 2022, had 730.
Over 10 years of annual figures the share held within 2 points, from 53.7% in 2014 to 51.9% in 2023; its peak was 53.7% in 2014. Nationally, every county with a figure for the same period pools to 33.4%; Sarpy County sits 18.5 points above it. CDC also counts 361 tests taken after mitigation in Sarpy County for the same period: tests in homes where a fix was already in.
Sarpy CountyNebraska, pooled
51.9% % of tests38.2% % of tests
| Year | Tests | Sarpy County, at or above 4 pCi/L | Nebraska, pooled |
|---|---|---|---|
| 2014 | 7,320 | 53.7% | 50.5% |
| 2015 | 7,671 | 51.3% | 53.3% |
| 2016 | 8,469 | 46.4% | 47.4% |
| 2017 | 7,662 | 44.0% | 47.7% |
| 2018 | 6,576 | 50.1% | 44.5% |
| 2019 | 5,205 | 49.7% | 44.3% |
| 2020 | 4,563 | 46.0% | 42.2% |
| 2021 | 3,726 | 29.5% | 34.9% |
| 2022 | 730 | 46.7% | 34.0% |
| 2023 | 755 | 51.9% | 38.2% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Sarpy County, Geology
The ground under Sarpy County
PredictedUSGS's geologic map puts all of Sarpy 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 | 99.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Sarpy County beside the ground around it
Sarpy County has more high-potential ground than Nebraska as a whole: 100% of its land against 40.9%. Of the 5 counties that border it, none has as large a share of high-potential ground; Cass County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Sarpy County, Local resources
Radon testing and mitigation in Sarpy County
Listed radon businesses with an address in Sarpy 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.
Listed radon professionals by town: Papillion, La Vista
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
Sarpy County, Questions
Questions about radon in Sarpy County
Are radon levels high in Sarpy County?
In 2023, 51.9% of the radon tests reported to CDC for Sarpy County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.1 pCi/L. Of 33 Nebraska counties with 30 or more tests for the same period, 22 reported a higher share; pooled, the state comes to 38.2%.
Which counties border Sarpy County?
Sarpy County borders 5 counties: Cass County, NE, Douglas County, NE, Mills County, IA, Saunders County, NE and Pottawattamie County, IA.
Products
Sarpy County, Products
Testing a home in Sarpy County
In Sarpy County, 51.9% of 755 tests reported to CDC in 2023 reached 4 pCi/L, against 38.2% pooled across Nebraska. In Zone 1 the year-round level in Sarpy 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
Wave Radon battery smart radon monitor
- C-NRPP 2024/25: Not included
- Battery
- Bluetooth
- App only
Method: Alpha spectrometry
Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Sarpy County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Sarpy County
Explore
Sarpy County, Bordering counties
Counties bordering Sarpy County
Calculated by Radon411- Radon levels in Saunders County, NEEPA zone 1
73.2%at or above 4 pCi/L
Median 6.2 pCi/L · 97 tests · 21.3 points above Sarpy County
- Radon levels in Cass County, NEEPA zone 1
68.5%at or above 4 pCi/L
Median 5.5 pCi/L · 111 tests · 16.6 points above Sarpy County
- Radon levels in Douglas County, NEEPA zone 1
38.7%at or above 4 pCi/L
Median 2.9 pCi/L · 2,754 tests · 13.2 points below Sarpy County
- Radon levels in Mills County, IAEPA zone 1
No CDC figure for 2023; its page reads it against its own neighbours.
- Radon levels in Pottawattamie County, IAEPA zone 1
No CDC figure for 2023; its page reads it against its own neighbours.
Sarpy County, Cities and towns
Cities and towns in Sarpy County
Sarpy County is growing: the Census Bureau puts it at 208,303 residents on July 1, 2025, up 9.0% from 191,179 in 2020. That works out to 875 people per square mile of land. Its largest town, Bellevue, has 64,863 residents, 31.1% of the total. Together its 5 incorporated places hold 56.3% of those residents; the other 43.7% live outside any of them. Reported testing is thin here: 755 tests over 2023, or 3.6 for every 1,000 residents (2025 estimate), where Nebraska as a whole comes to 5.5.
From Bellevue to Springfield, CDC publishes no figure by town: each reads Sarpy County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Bellevue | 64,863 | −0.5% | 31.1% |
| Papillion | 25,127 | −1.4% | 12.1% |
| La Vista | 16,543 | −1.4% | 7.9% |
| Gretna | 9,207 | −1.1% | 4.4% |
| Springfield | 1,529 | +1.2% | 0.7% |
5 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).
Sarpy County, Homes
Homes in Sarpy County
Of Sarpy County's 75,293 homes, 74% are detached houses, against 72% across Nebraska; 18% are in buildings of five or more homes. Much of Sarpy County is recent building: 42% of its homes have gone up since 2000 and the middle year built is 1995, against 1975 for Nebraska. 71% 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 | Sarpy County | Nebraska |
|---|---|---|
| Housing units | 75,293 | 855,631 |
| Detached houses | 74% | 72% |
| In buildings of 5 or more | 18% | 17% |
| Mobile homes | 1% | 3% |
| Built before 1960 | 8% | 32% |
| Built since 2000 | 42% | 22% |
| Middle year built | 1995 | 1975 |
| Owner-occupied | 71% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.