Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Eagle County, Colorado
EPA puts Eagle County in Zone 2, its middle radon zone, and high results are common there: 45.8% of the 312 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
45.8%
6.9 pts above CO
- Eagle
- 45.8%
- Colorado
- 38.9%
312 tests, 2023
Median result
3.5pCi/L
Below action level
- Eagle
- 3.5 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
312
13th of 38 by tests
- Eagle
- 312
- Jefferson
- 3,068
Reported to CDC before any fix, 2023
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in Colorado
11 of 38
Middle half
- Eagle
- 45.8%
- Park
- 57.5%
By share, of 38 with 30+ tests
Read a result for Eagle County
Starts at Eagle County's median, 3.5 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.5 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. Eagle County's median reported result, 2023.
The data
Eagle County, At a glance
Eagle County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Eagle County is a
USGS geologic potential: Moderate across 86% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Eagle County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 41.8% |
| 2015 | 47.4% |
| 2016 | 44.3% |
| 2017 | 43.0% |
| 2018 | 41.5% |
| 2019 | 46.2% |
| 2020 | 37.4% |
| 2021 | 45.9% |
| 2022 | 38.3% |
| 2023 | 45.8% |
2023: 45.8%. Across these years the share ran from 37.4% to 47.4%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 312 tests reported to CDC for Eagle 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).
Eagle County, Compared
Eagle County radon figures, compared
Calculated by Radon411In Eagle County, about 5 in 10 reported tests in 2023 (143 of 312) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 12.4 points higher. Across 61 Colorado counties pooled together, 38.9% of tests reached that level, so Eagle County runs 6.9 points above its state.
Of 6 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 5 a smaller one; the spread is 36.6% (Pitkin County) to 54.3% (Lake County). By share, Eagle County is 11th of 38 Colorado counties with 30 or more tests for the same period.
Year by year, 2014 opened at 41.8% and 2023 closed at 45.8% (up 4.0 points), with 2015 the high at 47.4%. Half the tests came in under 3.5 pCi/L and half over it; the single highest reached 79.3 pCi/L. Below the action level, 103 tests (33.0%) came in under 2 pCi/L, against 39.2% statewide, and 66 tests (21.2%) fell between 2 and 4, against 22.0% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 45.8% share point the same way here. USGS geology rates 86% of the county's land moderate radon potential. CDC also counts 53 tests taken after mitigation in Eagle County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2019, with 598 tests reported; the quietest, 2014, had 79.
Eagle CountyColorado, pooled
| Year | Tests | Eagle County, at or above 4 pCi/L | Colorado, pooled |
|---|---|---|---|
| 2014 | 79 | 41.8% | 46.5% |
| 2015 | 190 | 47.4% | 47.2% |
| 2016 | 246 | 44.3% | 38.5% |
| 2017 | 405 | 43.0% | 41.0% |
| 2018 | 574 | 41.5% | 44.2% |
| 2019 | 598 | 46.2% | 44.1% |
| 2020 | 513 | 37.4% | 41.9% |
| 2021 | 394 | 45.9% | 47.3% |
| 2022 | 345 | 38.3% | 38.6% |
| 2023 | 312 | 45.8% | 38.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Eagle County, State data
Colorado's own radon test data
MeasuredWhat Colorado's own agencies publish about radon tests in Eagle County, with their period. These are not CDC's figures and are never added to them.
MeasuredState figures, not CDC's
What Colorado CDPHE reports for Eagle County
Radon data (county results): radon test results received from radon testing labs, primarily short-term household tests taken by the homeowner. Period: 2005-2025.
Share over 4 pCi/L
44.7%
1,717 of 3,845 tests
Median result
3.5 pCi/L
Highest result
235.0 pCi/L
Tests behind these figures
3,845 tests
- CDPHE says these data do not give actual radon levels in homes that have not been tested.
- When possible, only tests conducted before a mitigation system was installed are used.
- Some counties have very small numbers of test results, and their summaries may be less representative.
- These figures describe tests reported to Colorado CDPHE in this area. They count a different set of tests than CDC's figures and are not a reading of any one home.
Measured: Colorado CDPHE data, 2005-2025.
Eagle County, Geology
The ground under Eagle County
PredictedMost of the ground under Eagle County is one class on USGS's geologic map: 86.3% of its land is moderate radon potential, with 13.7% high. The map puts 86.3% of Eagle County in the area it calls Western Slope and 13.7% in Rocky Mountains. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 15, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Western Slope | Paleozoic and Mesozoic sandstone, siltstone, shale, basalt. | Moderate | 11 | 86.3% |
| Rocky Mountains | Precambrian granites, gneiss, amphibolite, variable uranium content, abundant shear zones.Sedimentary rocks shed from the granitic highlands. | High | 15 | 13.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Eagle County beside the ground around it
Colorado as a whole has more high-potential ground than Eagle County: 74.8% of its land, against 13.7% here. Every one of the 6 counties that border it has more high-potential ground, Grand County the most at 98.1%.
The map rates the ground, not the air in any home.
Local help
Eagle County, Local resources
Radon testing and mitigation in Eagle County
- Colorado's radon programColorado Department of Public Health and EnvironmentColorado's radon program licenses or certifies radon professionals, offers free or discounted test kits and states the rule for disclosing radon when a home is sold, and answers questions about testing and mitigation in Colorado.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Order a discounted radon test kit
- Compare kits
- Professionals in Colorado25 professionals are listed in Colorado.
What Colorado's program says
- Licensing of radon professionals
Listed contractors are certified by the National Radon Proficiency Program or the National Radon Safety Board, and must be licensed by the Colorado Department of Regulatory Agencies.
- Disclosure when a home is sold or rented
As of August 7, 2023, landlords in Colorado are required to disclose radon information when a tenant signs a lease agreement.
What it means
Eagle County, Questions
Questions about radon in Eagle County
Are radon levels high in Eagle County?
In 2023, 45.8% of the radon tests reported to CDC for Eagle County, Colorado were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.5 pCi/L. Of 38 Colorado counties with 30 or more tests for the same period, 10 reported a higher share; pooled, the state comes to 38.9%.
Which counties border Eagle County?
Eagle County borders 6 counties: Lake County, Summit County, Pitkin County, Grand County, Garfield County and Routt County.
Products
Eagle County, Products
Testing a home in Eagle County
In Eagle County, 45.8% of 312 tests reported to CDC in 2023 reached 4 pCi/L, against 38.9% pooled across Colorado. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Eagle County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
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
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
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Eagle County, Bordering counties
Counties bordering Eagle County
Calculated by Radon411- Radon levels in Lake CountyEPA zone 1
54.3%at or above 4 pCi/L
Median 4.7 pCi/L · 35 tests · 8.5 points above Eagle County
- Radon levels in Routt CountyEPA zone 2
44.4%at or above 4 pCi/L
Median 3.3 pCi/L · 178 tests · 1.4 points below Eagle County
- Radon levels in Grand CountyEPA zone 1
44.1%at or above 4 pCi/L
Median 3.3 pCi/L · 136 tests · 1.7 points below Eagle County
- Radon levels in Garfield CountyEPA zone 1
39.3%at or above 4 pCi/L
Median 2.9 pCi/L · 224 tests · 6.5 points below Eagle County
- Radon levels in Summit CountyEPA zone 1
38.3%at or above 4 pCi/L
Median 2.0 pCi/L · 295 tests · 7.5 points below Eagle County
- Radon levels in Pitkin CountyEPA zone 1
36.6%at or above 4 pCi/L
Median 2.5 pCi/L · 164 tests · 9.2 points below Eagle County
Eagle County, Cities and towns
Cities and towns in Eagle County
About 54,291 people live in Eagle County by the Census Bureau's estimate for July 1, 2025, 1,366 fewer than in 2020 (−2.5%). That works out to 32 people per square mile of land. No town dominates: Gypsum, the largest, has 9,212 residents, 17.0% of the total. Testing is reported here more often than across the state: CDC's 312 reported tests for 2023 come to 5.7 for every 1,000 residents (2025 estimate), against 3.6 for Colorado.
From Gypsum to Red Cliff, CDC publishes no figure by town: each reads Eagle County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Gypsum | 9,212 | +13.7% | 17.0% |
| Eagle | 7,280 | −3.0% | 13.4% |
| Avon | 6,184 | +0.7% | 11.4% |
| Vail | 4,407 | −8.7% | 8.1% |
| Basaltextends beyond Eagle County | 4,009 | +1.1% | Counted whole |
| Minturn | 986 | −4.7% | 1.8% |
| Red Cliff | 238 | −8.5% | 0.4% |
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). A place that extends beyond Eagle County is counted whole, so it has no share.
Eagle County, Homes
Homes in Eagle County
Eagle County has 33,455 homes, and many share a building: 35% are in buildings of five or more, 36% are detached houses, against 62% across Colorado. Half of its homes were built before 1992, close to Colorado's 1987: 4% date from before 1960 and 28% from 2000 or later. 68% of occupied homes are lived in by their owner (Colorado: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Eagle County | Colorado |
|---|---|---|
| Housing units | 33,455 | 2,545,124 |
| Detached houses | 36% | 62% |
| In buildings of 5 or more | 35% | 22% |
| Mobile homes | 6% | 4% |
| Built before 1960 | 4% | 16% |
| Built since 2000 | 28% | 31% |
| Middle year built | 1992 | 1987 |
| Owner-occupied | 68% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.