Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Elbert County, Colorado
EPA puts Elbert County in Zone 1, its highest radon zone, and high results are common there: 45.8% of the 120 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
- Elbert
- 45.8%
- Colorado
- 38.9%
120 tests, 2023
Median result
2.9pCi/L
Below action level
- Elbert
- 2.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
120
26th of 38 by tests
- Elbert
- 120
- Jefferson
- 3,068
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 Colorado
11 of 38
Middle half
- Elbert
- 45.8%
- Park
- 57.5%
By share, of 38 with 30+ tests
Read a result for Elbert County
Starts at Elbert 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. Elbert County's median reported result, 2023.
The data
Elbert County, At a glance
Elbert County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Elbert 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 Elbert County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 68.0% |
| 2015 | 59.6% |
| 2016 | 42.5% |
| 2017 | 66.1% |
| 2018 | 35.6% |
| 2019 | 59.5% |
| 2020 | 48.4% |
| 2021 | 64.3% |
| 2022 | 45.8% |
| 2023 | 45.8% |
2023: 45.8%. Across these years the share ran from 35.6% to 68.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 120 tests reported to CDC for Elbert 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).
Elbert County, Compared
Elbert County radon figures, compared
Calculated by Radon411In Elbert County, about 5 in 10 reported tests in 2023 (55 of 120) 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 Elbert County runs 6.9 points above its state.
Of 3 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 34.4% (El Paso County) to 37.9% (Arapahoe County). By share, Elbert County is 11th of 38 Colorado counties with 30 or more tests for the same period.
Year by year, 2015 opened at 59.6% and 2023 closed at 45.8% (down 13.8 points), with 2017 the high at 66.1%. Half the tests came in under 2.9 pCi/L and half over it; the single highest reached 71.2 pCi/L. Below the action level, 43 tests (35.8%) came in under 2 pCi/L, against 39.2% statewide, and 22 tests (18.3%) fell between 2 and 4, against 22.0% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 45.8% share point the same way here. USGS geology rates 100% of the county's land high radon potential. CDC also counts 28 tests taken after mitigation in Elbert County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2018, with 163 tests reported; the quietest, 2014, had 25.
Elbert CountyColorado, pooled
| Year | Tests | Elbert County, at or above 4 pCi/L | Colorado, pooled |
|---|---|---|---|
| 2015 | 57 | 59.6% | 47.2% |
| 2016 | 40 | 42.5% | 38.5% |
| 2017 | 62 | 66.1% | 41.0% |
| 2018 | 163 | 35.6% | 44.2% |
| 2019 | 121 | 59.5% | 44.1% |
| 2020 | 157 | 48.4% | 41.9% |
| 2021 | 98 | 64.3% | 47.3% |
| 2022 | 142 | 45.8% | 38.6% |
| 2023 | 120 | 45.8% | 38.9% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Elbert County, State data
Colorado's own radon test data
MeasuredWhat Colorado's own agencies publish about radon tests in Elbert 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 Elbert 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
53.4%
551 of 1,031 tests
Median result
4.2 pCi/L
Highest result
240.0 pCi/L
Tests behind these figures
1,031 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.
Elbert County, Geology
The ground under Elbert County
PredictedUSGS's geologic map puts all of Elbert County's mapped land in one class: high radon potential. The map puts 56.0% of Elbert County in the area it calls High Plains and 43.8% in Dawson Arkose. USGS gives the first a radon index of 12 and the second 14, both in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| High Plains | Quaternary deposits and Cretaceous marine shales that locally have a high radiometric signature. | High | 12 | 56.0% |
| Dawson Arkose | Consolidated alluvial fan and river deposits sourced in the granite mountains to the west. | High | 14 | 43.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Elbert County beside the ground around it
Elbert County has more high-potential ground than Colorado as a whole: 100% of its land against 74.8%. Of the 4 counties that border it, none has as large a share of high-potential ground; Arapahoe County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Elbert County, Local resources
Radon testing and mitigation in Elbert 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
Elbert County, Questions
Questions about radon in Elbert County
Are radon levels high in Elbert County?
In 2023, 45.8% of the radon tests reported to CDC for Elbert County, Colorado were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.9 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 Elbert County?
Elbert County borders 4 counties: Arapahoe County, Douglas County, El Paso County and Lincoln County.
Products
Elbert County, Products
Testing a home in Elbert County
In Elbert County, 45.8% of 120 tests reported to CDC in 2023 reached 4 pCi/L, against 38.9% pooled across Colorado. In Zone 1 the year-round level in Elbert 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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
Short-term kitempowerDX
Standard Radon Test short-term mail-in radon test kit
- Lab fee included
Method: Passive sampler
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Elbert County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Elbert County
Explore
Elbert County, Bordering counties
Counties bordering Elbert County
Calculated by Radon411- Radon levels in Lincoln CountyEPA zone 1
57.1%at or above 4 pCi/L
Median 4.0 pCi/L · 7 tests · 11.3 points above Elbert County
- Radon levels in Arapahoe CountyEPA zone 1
37.9%at or above 4 pCi/L
Median 2.5 pCi/L · 1,990 tests · 7.9 points below Elbert County
- Radon levels in Douglas CountyEPA zone 1
35.8%at or above 4 pCi/L
Median 2.4 pCi/L · 1,635 tests · 10.0 points below Elbert County
- Radon levels in El Paso CountyEPA zone 1
34.4%at or above 4 pCi/L
Median 2.5 pCi/L · 1,844 tests · 11.4 points below Elbert County
Elbert County, Cities and towns
Cities and towns in Elbert County
Elbert County is growing: the Census Bureau puts it at 30,534 residents on July 1, 2025, up 16.5% from 26,211 in 2020. That works out to 16 people per square mile of land. No town dominates: Elizabeth, the largest, has 2,957 residents, 9.7% of the total. Together its 3 incorporated places hold 14.0% of those residents; the other 86.0% live outside any of them. CDC's 120 reported tests for 2023 work out to 3.9 per 1,000 residents (2025 estimate), close to Colorado's 3.6.
From Elizabeth to Simla, CDC publishes no figure by town: each reads Elbert County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Elizabeth | 2,957 | +72.9% | 9.7% |
| Kiowa | 738 | +0.3% | 2.4% |
| Simla | 587 | −3.6% | 1.9% |
3 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).
Elbert County, Homes
Homes in Elbert County
Elbert County is a place of houses on their own lots: 95% of its 10,193 homes are detached single-family houses, against 62% across Colorado. Much of Elbert County is recent building: 36% of its homes have gone up since 2000 and the middle year built is 1996, against 1987 for Colorado. Owners live in 94% of the occupied homes (Colorado: 66%), so for most households a test and a fix are their own to order.
| Homes | Elbert County | Colorado |
|---|---|---|
| Housing units | 10,193 | 2,545,124 |
| Detached houses | 95% | 62% |
| In buildings of 5 or more | under 1% | 22% |
| Mobile homes | 3% | 4% |
| Built before 1960 | 8% | 16% |
| Built since 2000 | 36% | 31% |
| Middle year built | 1996 | 1987 |
| Owner-occupied | 94% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.