Denver, CO Radon Levels
Check local Denver radon levels and find certified testing and mitigation professionals to keep your home safe
Denver, CO Radon Facts
This section of Denver in Adams County shows concerning radon levels, with an average reading of 6.22 pCi/L that significantly exceeds the EPA action threshold. Located within the Denver Metro area where uranium-rich soil and high altitude combine to create elevated radon conditions, homeowners in the 80221 zip code should prioritize professional radon testing and mitigation.
Based on 9 user-submitted radon tests for homes in Denver, CO. The EPA recommends taking action at or above 4.0 pCi/L.
Denver, CO Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Denver, CO Radon Levels
User-submitted radon test readings from homes in the Denver area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 10 pCi/L | Denver, CO | 0-20 Years | No Basement/All Crawl Space |
| 8 pCi/L | Denver, CO | 51-99 Years | Partial Basement |
| 4 pCi/L | Denver, CO | 21-50 Years | Full Basement |
| 9 pCi/L | Denver, CO | 51-99 Years | No Basement/All Crawl Space |
| 5 pCi/L | Denver, CO | 100+ Years | Full Basement |
Have a radon test result for Denver? Submit your reading to help other homeowners.
Radon Readings Near Denver, CO
Compare radon levels in Denver with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Commerce City | 7.1 mi | 9.00 pCi/L | 1 |
| Englewood | 8.6 mi | 11.00 pCi/L | 2 |
| Arvada | 9.3 mi | 5.00 pCi/L | 2 |
| Littleton | 11.8 mi | 6.00 pCi/L | 2 |
| Aurora | 12.2 mi | 7.40 pCi/L | 5 |
| Morrison | 13.4 mi | 5.00 pCi/L | 3 |
| Broomfield | 13.5 mi | 5.00 pCi/L | 1 |
| Brighton | 17.1 mi | 6.00 pCi/L | 2 |
Denver County Radon Profile
Because of its underlying geology, Denver County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 1 city in Denver County average 6.60 pCi/L across 5 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Denver County home regardless of zone or a neighbor's results.