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 Colfax County, Nebraska
EPA puts Colfax County in Zone 1, its highest radon zone, and only 18 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
54.3%
6.6 pts above NE
- Colfax
- 54.3%
- Nebraska
- 47.7%
243 tests, 2017
Median result
4.9pCi/L
Action level reached
- Colfax
- 4.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2017
Tests reported
243
38th of 74 by tests
- Colfax
- 243
- Douglas
- 18,306
Reported to CDC before any fix, 2017
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
42 of 74
Middle half
- Colfax
- 54.3%
- Webster
- 84.6%
By share, of 74 with 30+ tests
Read a result for Colfax County
Starts at Colfax County's median, 4.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.9 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. Colfax County's median reported result, 2017.
The data
Colfax County, At a glance
Colfax County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Colfax 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 Colfax County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 40.0% |
| 2015 | 59.2% |
| 2016 | 55.3% |
| 2017 | 54.3% |
| 2018 | 74.1% |
| 2019 | 58.3% |
| 2020 | 62.5% |
| 2021 | 62.5% |
| 2022 | 50.0% |
| 2023 | 55.6% |
2023: 55.6%. Across these years the share ran from 40.0% to 74.1%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 18 tests were reported to CDC for Colfax 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).
Colfax County, Compared
Colfax County radon figures, compared
Calculated by Radon411More than half: 54.3% of the 243 radon tests reported to CDC for Colfax County in 2017 read at least 4 pCi/L. That places it 42nd of 74 Nebraska counties with 30 or more tests for the same period. That is 6.6 points above the 47.7% pooled from 92 Nebraska counties.
The newest figure, in 2023, counts only 18 tests (55.6% at or above 4 pCi/L), too few to compare, so this reading uses the 243-test figure.
The median result, 4.9 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 26.2 pCi/L. The rest split 23.5% under 2 pCi/L and 22.2% from 2 to 4 (Nebraska: 25.6% and 26.7%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 54.3% share point the same way here.
2 of its 5 bordering counties with figures ran higher, led by Cuming County at 64.3%; Dodge County reported 49.3%. Statewide for the same period, Webster County reported the highest share (84.6%) and Cherry County the lowest (15.4%).
The busiest year on file was 2017, with 243 tests reported; the quietest, 2022, had 8.
Over 8 years of annual figures the share rose 22.5 points, from 40.0% in 2014 to 62.5% in 2021; its peak was 74.1% in 2018. Nationally, every county with a figure for the same period pools to 31.7%; Colfax County sits 22.6 points above it.
Colfax CountyNebraska, pooled
62.5% % of tests34.9% % of tests
| Year | Tests | Colfax County, at or above 4 pCi/L | Nebraska, pooled |
|---|---|---|---|
| 2014 | 75 | 40.0% | 50.5% |
| 2015 | 213 | 59.2% | 53.3% |
| 2016 | 228 | 55.3% | 47.4% |
| 2017 | 243 | 54.3% | 47.7% |
| 2018 | 81 | 74.1% | 44.5% |
| 2019 | 144 | 58.3% | 44.3% |
| 2020 | 48 | 62.5% | 42.2% |
| 2021 | 48 | 62.5% | 34.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Colfax County, Geology
The ground under Colfax County
PredictedUSGS's geologic map puts all of Colfax 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 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Colfax County beside the ground around it
Colfax 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; Cuming County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Colfax County, Local resources
Radon testing and mitigation in Colfax 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
Colfax County, Questions
Questions about radon in Colfax County
Are radon levels high in Colfax County?
In 2023, 55.6% of the radon tests reported to CDC for Colfax County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 7.6 pCi/L. Of 74 Nebraska counties with 30 or more tests for the same period, 41 reported a higher share; pooled, the state comes to 47.7%.
Which counties border Colfax County?
Colfax County borders 5 counties: Dodge County, Stanton County, Platte County, Cuming County and Butler County.
Products
Colfax County, Products
Testing a home in Colfax County
In Colfax County, 54.3% of 243 tests reported to CDC in 2017 reached 4 pCi/L, against 47.7% pooled across Nebraska. In Zone 1 the year-round level in Colfax 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
Colfax County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Colfax County
Explore
Colfax County, Bordering counties
Counties bordering Colfax County
Calculated by Radon411- Radon levels in Cuming CountyEPA zone 1
64.3%at or above 4 pCi/L
Median 5.0 pCi/L · 294 tests · 10.0 points above Colfax County
- Radon levels in Butler CountyEPA zone 1
57.7%at or above 4 pCi/L
Median 5.1 pCi/L · 1,212 tests · 3.4 points above Colfax County
- Radon levels in Platte CountyEPA zone 1
53.3%at or above 4 pCi/L
Median 4.3 pCi/L · 1,104 tests · 1.0 points below Colfax County
- Radon levels in Stanton CountyEPA zone 1
52.7%at or above 4 pCi/L
Median 4.4 pCi/L · 165 tests · 1.6 points below Colfax County
- Radon levels in Dodge CountyEPA zone 1
49.3%at or above 4 pCi/L
Median 3.9 pCi/L · 1,266 tests · 5.0 points below Colfax County
Colfax County, Cities and towns
Cities and towns in Colfax County
The Census Bureau estimates 10,934 residents in Colfax County for July 1, 2025, 375 more than in 2020 (+3.6%). That works out to 27 people per square mile of land. Schuyler alone is home to 6,800 of them, 62.2% of the total. Together its 6 incorporated places hold 78.9% of those residents; the other 21.1% live outside any of them. CDC's 243 reported tests for 2017 work out to 22.2 per 1,000 residents (2025 estimate), close to Nebraska's 32.5.
From Schuyler to Richland, CDC publishes no figure by town: each reads Colfax County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Schuyler | 6,800 | +4.3% | 62.2% |
| Clarkson | 630 | −1.4% | 5.8% |
| Howells | 573 | +2.7% | 5.2% |
| Leigh | 462 | +6.0% | 4.2% |
| Rogers | 84 | +3.7% | 0.8% |
| Richland | 83 | +10.7% | 0.8% |
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).
Colfax County, Homes
Homes in Colfax County
Colfax County is a place of houses on their own lots: 81% of its 3,996 homes are detached single-family houses, against 72% across Nebraska. Half of its homes were built before 1970, close to Nebraska's 1975: 40% date from before 1960 and 12% from 2000 or later. Owners live in 76% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.
| Homes | Colfax County | Nebraska |
|---|---|---|
| Housing units | 3,996 | 855,631 |
| Detached houses | 81% | 72% |
| In buildings of 5 or more | 3% | 17% |
| Mobile homes | 11% | 3% |
| Built before 1960 | 40% | 32% |
| Built since 2000 | 12% | 22% |
| Middle year built | 1970 | 1975 |
| Owner-occupied | 76% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.