Longmont, CO Radon Levels
Check local Longmont radon levels and find certified testing and mitigation professionals to keep your home safe
Longmont, CO Radon Facts
Positioned between Boulder and Fort Collins in Boulder County, Longmont demonstrates an average radon level of 8.0 pCi/L that substantially exceeds the EPA action threshold of 4.0 pCi/L. The city's location on Colorado's Front Range, with uranium-bearing granite and sedimentary deposits, creates prime conditions for elevated radon concentrations. With readings ranging from 4.0 to 20.0 pCi/L across zip codes 80501, 80503, and 80504, immediate radon testing and mitigation should be priorities for all residents.
Based on 4 user-submitted radon tests for homes in Longmont, CO. The EPA recommends taking action at or above 4.0 pCi/L.
Longmont, CO Radon Mitigation
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Longmont, CO Radon Levels
User-submitted radon test readings from homes in the Longmont area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Longmont, CO | 21-50 Years | — |
| 20 pCi/L | Longmont, CO | 0-20 Years | No Basement/All Crawl Space |
| 4 pCi/L | Longmont, CO | 0-20 Years | — |
Have a radon test result for Longmont? Submit your reading to help other homeowners.
Radon Readings Near Longmont, CO
Compare radon levels in Longmont with the closest nearby cities that have user-submitted test data.
Boulder County Radon Profile
Boulder County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 4 cities in Boulder County average 10.17 pCi/L across 6 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Boulder County to test, as levels can differ between neighboring homes.