Grand Junction, CO Radon Levels
Check local Grand Junction radon levels and find certified testing and mitigation professionals to keep your home safe
Grand Junction, CO Radon Facts
Colorado's Grand Junction, spanning multiple zip codes in Mesa County, shows an average radon level of 8.17 pCi/L, more than double the EPA action threshold. The Colorado Plateau's uranium-bearing rock formations and the area's mix of ranch-style homes with basements create significant radon accumulation potential throughout this western slope metropolitan area.
Based on 7 user-submitted radon tests for homes in Grand Junction, CO. The EPA recommends taking action at or above 4.0 pCi/L.
Grand Junction, CO Radon Mitigation
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Grand Junction, CO Radon Levels
User-submitted radon test readings from homes in the Grand Junction area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Grand Junction, CO | 0-20 Years | Full Basement |
| 4 pCi/L | Grand Junction, CO | 0-20 Years | No Basement/All Slab |
| 20 pCi/L | Grand Junction, CO | 51-99 Years | Partial Basement |
| 7 pCi/L | Grand Junction, CO | 21-50 Years | No Basement/All Crawl Space |
| 5 pCi/L | Grand Junction, CO | 0-20 Years | Partial Basement |
Have a radon test result for Grand Junction? Submit your reading to help other homeowners.
Radon Readings Near Grand Junction, CO
Compare radon levels in Grand Junction with the closest nearby cities that have user-submitted test data.
Mesa County Radon Profile
Because of its underlying geology, Mesa 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 3 cities in Mesa County average 9.13 pCi/L across 8 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 Mesa County home regardless of zone or a neighbor's results.