Listed for: Mitigation
Licenses on file: see the profile
Locations and reports
Radon in Lakewood, Colorado
EPA puts Jefferson County, where Lakewood is, in Zone 1, its highest radon zone, and high results are common there: 41.8% of the 3,068 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
41.8%
2.9 pts above CO
- Jefferson
- 41.8%
- Colorado
- 38.9%
Jefferson, 17th of 38 in CO, 2023
Median result
3.2pCi/L
Below action level
- Jefferson
- 3.2 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of Jefferson's tests, 2023
Nearest county
35.4%
Denver, 14 miles
- Denver
- 35.4%
- Jefferson
- 41.8%
2,277 tests, 2023
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
Jefferson, where Lakewood is
Tests reported
3,068
In Jefferson
- Jefferson
- 3,068
- Denver
- 2,277
Reported to CDC before any fix, 2023
Read a result for Lakewood
Starts at Jefferson County's median, 3.2 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.2 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. Jefferson County's median reported result, 2023.
The data
Lakewood, What is published
What is published for Lakewood
Information:
Every figure for Lakewood is a county's
Radon data is published by county, not by city, so for Lakewood it is Jefferson County's: its EPA zone (Zone 1) and the 3,068 tests reported to CDC for 2023. Only a test tells you about one home.
Lakewood covers 43.5 square miles of land, all of it in Jefferson County. About 156,927 people live there, 3,610 to the square mile.
Lakewood, Counties
The county Lakewood lies in
MeasuredJefferson County's EPA zone and the figures CDC publishes for it, 2023.
Jefferson CountyZone 1Highest predicted potential
- 41.8%
- Reported tests at or above 4 pCi/L
- 3.2 pCi/L
- Median reported result
- 3,068 tests
- Tests reported to CDC
- 10
- Annual years on file
Jefferson County ranks 17th of 38 Colorado counties with 30 or more tests for that period, 2.9 points above the 38.9% pooled across Colorado's counties, 8.4 points above the national pool of 33.4%.
The counties nearest Lakewood with a CDC figure for 2023, measured from the middle of the city: Denver County (14 miles, 35.4% of 2,277 tests), Broomfield County (18 miles, 36.9% of 758 tests) and Gilpin County (24 miles, 26.4% of 129 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 26.4% to 41.2%; the farthest of them, Adams County, is 43 miles away at 36.6%.
The directory lists 2 businesses with an address in Lakewood, 2 for mitigation. Colorado's other cities with a page of their own: Colorado Springs, Fort Collins, Grand Junction and Aurora.
The counties around Lakewood
By distance from the middle of Lakewood; counties with 30 or more tests.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.
Lakewood, Geology
The ground under Lakewood
PredictedUSGS's geologic map puts all of Lakewood's mapped land in one class: high radon potential. The map puts 94.6% of Lakewood in the area it calls High Plains and 3.9% in Rocky Mountains, with one smaller area beside them. USGS gives the first a radon index of 12 and the second 15, 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 | 94.6% |
| Rocky Mountains | Precambrian granites, gneiss, amphibolite, variable uranium content, abundant shear zones.Sedimentary rocks shed from the granitic highlands. | High | 15 | 3.9% |
| Dawson Arkose | Consolidated alluvial fan and river deposits sourced in the granite mountains to the west. | High | 14 | 1.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Lakewood beside its county and Colorado
All of Lakewood, like all of Jefferson County, is rated high. Lakewood has more high-potential ground than Colorado as a whole: 100% of its land against 74.8%.
The map rates the ground, not the air in any home.
Lakewood, Homes
Homes in Lakewood
Lakewood has 73,000 homes, and many share a building: 34% are in buildings of five or more, 47% are detached houses, against 64% across Jefferson County. Half of its homes were built before 1977, close to Jefferson County's 1980: 17% date from before 1960 and 17% from 2000 or later. 58% of occupied homes are lived in by their owner (Jefferson County: 71%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Lakewood | Jefferson County | Colorado |
|---|---|---|---|
| Housing units | 73,000 | 251,183 | 2,545,124 |
| Detached houses | 47% | 64% | 62% |
| In buildings of 5 or more | 34% | 22% | 22% |
| Mobile homes | 1% | 1% | 4% |
| Built before 1960 | 17% | 14% | 16% |
| Built since 2000 | 17% | 19% | 31% |
| Middle year built | 1977 | 1980 | 1987 |
| Owner-occupied | 58% | 71% | 66% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.
Local help
Lakewood, Professionals
Radon professionals listed in Lakewood
Businesses whose listed city is Lakewood, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.
Radon professionals listed in Lakewood: 1 of 2
2 listings with Lakewood as the city. See radon mitigation in Lakewood, or all radon professionals in Colorado.
Lakewood, Local resources
Local resources for Lakewood
Who to ask in Colorado: its radon program, test kits and professionals.
What it means
Lakewood, Questions
Questions about radon in Lakewood
What radon zone is Lakewood in?
Lakewood has no zone of its own: it shares Jefferson County's, Zone 1, the map's highest class: a predicted county average above 4 pCi/L.
What are radon levels in Lakewood?
41.8% of the 3,068 tests reported from Jefferson County for 2023 were at or above 4 pCi/L, the level at which EPA says to fix a home: high results are ordinary around Lakewood. The median reported result was 3.2 pCi/L.
Should I test my home in Lakewood?
Yes. About 1,282 of the 3,068 tests reported from Jefferson County were at or above 4 pCi/L. That is above Colorado's pooled 38.9%, and ranks Jefferson County 17th of the 38 Colorado counties with 30 or more tests. No map says which homes those are. How to test a home.
What ground is Lakewood built on, as far as radon goes?
94.6% of Lakewood sits on what USGS's map calls "High Plains", rated high for radon potential, radon index 12; another 3.9% is "Rocky Mountains", in the same class. One smaller area makes up the rest.
Is radon higher in the counties around Lakewood?
No. Jefferson County's 41.8% is above every one of the 8 nearest counties with a figure: the closest share to it is Clear Creek County (41.2%, 28 miles off), the lowest Gilpin County (26.4%, 24 miles off).
Who tests for or fixes radon in Lakewood?
Radon411's directory has 2 businesses with an address in Lakewood, all listed for mitigation, none for testing. Every entry names the public list it was taken from. Radon professionals in Lakewood.
The answers use the published figures of Jefferson County, the county Lakewood lies in.
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