Fort Collins, CO Radon Levels
Check local Fort Collins radon levels and find certified testing and mitigation professionals to keep your home safe
Fort Collins, CO Radon Facts
Nestled against Colorado's Front Range in Larimer County, Fort Collins has documented radon levels averaging 10.0 pCi/L, well above the EPA action threshold. The city's position where the Great Plains meet the Rocky Mountains creates ideal conditions for radon accumulation, with uranium-rich granite formations contributing to elevated readings across multiple zip codes. Residents throughout the Fort Collins Metro should prioritize radon testing and mitigation given these consistently high measurements.
Based on 2 user-submitted radon tests for homes in Fort Collins, CO. The EPA recommends taking action at or above 4.0 pCi/L.
Fort Collins, CO Radon Mitigation
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Fort Collins, CO Radon Levels
User-submitted radon test readings from homes in the Fort Collins area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 1 pCi/L | Fort Collins, CO | 0-20 Years | Full Basement |
| 10 pCi/L | Fort Collins, CO | 21-50 Years | Partial Basement |
Have a radon test result for Fort Collins? Submit your reading to help other homeowners.
Radon Readings Near Fort Collins, CO
Compare radon levels in Fort Collins with the closest nearby cities that have user-submitted test data.
Larimer County Radon Profile
Because of its underlying geology, Larimer 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 7 cities in Larimer County average 10.75 pCi/L across 12 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 Larimer County home regardless of zone or a neighbor's results.