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 Douglas County, Nebraska
EPA puts Douglas County in Zone 1, its highest radon zone, and 38.7% of its 2,754 reported radon tests (2023) were 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
38.7%
0.5 pts above NE
- Douglas
- 38.7%
- Nebraska
- 38.2%
2,754 tests, 2023
Median result
2.9pCi/L
Below action level
- Douglas
- 2.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
2,754
2nd of 33 by tests
- Douglas
- 2,754
- 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
24 of 33
Middle half
- Douglas
- 38.7%
- Gage
- 79.8%
By share, of 33 with 30+ tests
Read a result for Douglas County
Starts at Douglas County's median, 2.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.9 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. Douglas County's median reported result, 2023.
The data
Douglas County, At a glance
Douglas County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Douglas 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 Douglas County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 49.8% |
| 2015 | 49.4% |
| 2016 | 41.3% |
| 2017 | 42.2% |
| 2018 | 45.3% |
| 2019 | 39.9% |
| 2020 | 37.1% |
| 2021 | 32.5% |
| 2022 | 28.2% |
| 2023 | 38.7% |
2023: 38.7%. Across these years the share ran from 28.2% to 49.8%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 2,754 tests reported to CDC for Douglas 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).
Douglas County, Compared
Douglas County radon figures, compared
Calculated by Radon411In Douglas County, about 4 in 10 reported tests in 2023 (1,066 of 2,754) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 5.3 points higher. Across 86 Nebraska counties pooled together, 38.2% of tests reached that level, so Douglas County runs 0.5 points above its state.
Of 4 neighbours with a figure, all 4 reported a larger share at or above 4 pCi/L; the spread is 51.9% (Sarpy County) to 76.1% (Washington County). By share, Douglas County is 24th of 33 Nebraska counties with 30 or more tests for the same period.
Year by year, 2014 opened at 49.8% and 2023 closed at 38.7% (down 11.1 points), with 2014 the high at 49.8%. Half the tests came in under 2.9 pCi/L and half over it; the single highest reached 112.9 pCi/L. Below the action level, 1,004 tests (36.5%) came in under 2 pCi/L, against 39.2% statewide, and 684 tests (24.8%) fell between 2 and 4, against 22.6% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 38.7% share point the same way here. USGS geology rates 100% of the county's land high radon potential. CDC also counts 1,052 tests taken after mitigation in Douglas County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2016, with 20,817 tests reported; the quietest, 2023, had 2,754.
Douglas CountyNebraska, pooled
| Year | Tests | Douglas County, at or above 4 pCi/L | Nebraska, pooled |
|---|---|---|---|
| 2014 | 18,288 | 49.8% | 50.5% |
| 2015 | 20,157 | 49.4% | 53.3% |
| 2016 | 20,817 | 41.3% | 47.4% |
| 2017 | 18,306 | 42.2% | 47.7% |
| 2018 | 16,500 | 45.3% | 44.5% |
| 2019 | 15,510 | 39.9% | 44.3% |
| 2020 | 13,779 | 37.1% | 42.2% |
| 2021 | 10,416 | 32.5% | 34.9% |
| 2022 | 3,678 | 28.2% | 34.0% |
| 2023 | 2,754 | 38.7% | 38.2% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Douglas County, Geology
The ground under Douglas County
PredictedUSGS's geologic map puts all of Douglas 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 | 99.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Douglas County beside the ground around it
Douglas 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; Dodge County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Douglas County, Local resources
Radon testing and mitigation in Douglas County
Listed radon businesses with an address in Douglas 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: Omaha, Bennington, Waterloo
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
Douglas County, Questions
Questions about radon in Douglas County
Are radon levels high in Douglas County?
In 2023, 38.7% of the radon tests reported to CDC for Douglas County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.9 pCi/L. Of 33 Nebraska counties with 30 or more tests for the same period, 23 reported a higher share; pooled, the state comes to 38.2%.
Which counties border Douglas County?
Douglas County borders 5 counties: Sarpy County, NE, Washington County, NE, Saunders County, NE, Pottawattamie County, IA and Dodge County, NE.
Products
Douglas County, Products
Testing a home in Douglas County
In Douglas County, 38.7% of 2,754 tests reported to CDC in 2023 reached 4 pCi/L, against 38.2% pooled across Nebraska. In Zone 1 the year-round level in Douglas 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
View Radon Wi-Fi radon monitor with an e-paper display
- C-NRPP 2024/25: Approved
- Battery
- Wi-Fi, Bluetooth
- Screen, app
Method: Alpha spectrometry
Readings: Every 60 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
Douglas County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Douglas County
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Douglas County, Bordering counties
Counties bordering Douglas County
Calculated by Radon411- Radon levels in Washington County, NEEPA zone 1
76.1%at or above 4 pCi/L
Median 6.5 pCi/L · 71 tests · 37.4 points above Douglas County
- Radon levels in Saunders County, NEEPA zone 1
73.2%at or above 4 pCi/L
Median 6.2 pCi/L · 97 tests · 34.5 points above Douglas County
- Radon levels in Dodge County, NEEPA zone 1
62.1%at or above 4 pCi/L
Median 5.0 pCi/L · 116 tests · 23.4 points above Douglas County
- Radon levels in Sarpy County, NEEPA zone 1
51.9%at or above 4 pCi/L
Median 4.1 pCi/L · 755 tests · 13.2 points above Douglas County
- Radon levels in Pottawattamie County, IAEPA zone 1
No CDC figure for 2023; its page reads it against its own neighbours.
Douglas County, Cities and towns
Cities and towns in Douglas County
The Census Bureau estimates 606,460 residents in Douglas County for July 1, 2025, 21,032 more than in 2020 (+3.6%). Packed into its land, that is 1,858 people per square mile. Omaha alone is home to 488,797 of them, 80.6% of the total. Together its 6 incorporated places hold 82.8% of those residents; the other 17.2% live outside any of them. CDC's 2,754 reported tests for 2023 work out to 4.5 per 1,000 residents (2025 estimate), close to Nebraska's 5.5.
From Omaha to Boys Town, CDC publishes no figure by town: each reads Douglas County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Omaha | 488,797 | −0.8% | 80.6% |
| Ralston | 6,382 | −1.6% | 1.1% |
| Valley | 3,412 | +12.0% | 0.6% |
| Bennington | 1,968 | −2.6% | 0.3% |
| Waterloo | 917 | −2.2% | 0.2% |
| Boys Town | 616 | +46.7% | 0.1% |
Places in Douglas County with a city page: 1 of 1
6 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).
Douglas County, Homes
Homes in Douglas County
Of Douglas County's 248,692 homes, 66% are detached houses, against 72% across Nebraska; 26% are in buildings of five or more homes. Half of its homes were built before 1976, close to Nebraska's 1975: 29% date from before 1960 and 24% from 2000 or later. 62% 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 | Douglas County | Nebraska |
|---|---|---|
| Housing units | 248,692 | 855,631 |
| Detached houses | 66% | 72% |
| In buildings of 5 or more | 26% | 17% |
| Mobile homes | 1% | 3% |
| Built before 1960 | 29% | 32% |
| Built since 2000 | 24% | 22% |
| Middle year built | 1976 | 1975 |
| Owner-occupied | 62% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.