Grand Lake, CO Radon Levels
Check local Grand Lake radon levels and find certified testing and mitigation professionals to keep your home safe
Grand Lake, CO Radon Facts
Mountain community Grand Lake in Grand County shows an average radon level of 6.0 pCi/L, exceeding the EPA action threshold. Located at high elevation near Rocky Mountain National Park, the area's granite bedrock and seasonal cabin construction in zip code 80447 can trap radon gas effectively during winter months when homes are sealed tightly.
Based on 2 user-submitted radon tests for homes in Grand Lake, CO. The EPA recommends taking action at or above 4.0 pCi/L.
Grand Lake, CO Radon Mitigation
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Grand Lake, CO Radon Levels
User-submitted radon test readings from homes in the Grand Lake area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 6 pCi/L | Grand Lake, CO | 0-20 Years | No Basement/All Crawl Space |
Have a radon test result for Grand Lake? Submit your reading to help other homeowners.
Radon Readings Near Grand Lake, CO
Compare radon levels in Grand Lake with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Granby | 13.0 mi | 9.00 pCi/L | 4 |
| Estes Park | 25.0 mi | 6.50 pCi/L | 2 |
| Lyons | 28.4 mi | 14.50 pCi/L | 2 |
| Kremmling | 30.5 mi | 20.00 pCi/L | 2 |
| Black Hawk | 35.1 mi | 13.00 pCi/L | 4 |
| Boulder | 35.3 mi | 12.00 pCi/L | 1 |
| Idaho Springs | 36.5 mi | 4.00 pCi/L | 1 |
| Silverthorne | 37.3 mi | 10.00 pCi/L | 3 |
Grand County Radon Profile
Because of its underlying geology, Grand 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 Grand County average 11.00 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 Grand County home regardless of zone or a neighbor's results.