Fort Collins, CO Radon Mitigation and Testing
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
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
Fort Collins, CO Radon Testing
Finding qualified radon testing professionals is the first step toward protecting your home.
Fort Collins, Colorado Radon Levels
User-submitted radon test readings from homes in the Fort Collins area.
| Radon Level | City | Home Age | Foundation | Submitted |
|---|---|---|---|---|
| 1 pCi/L | Fort Collins, CO | 0-20 Years | Full Basement | Mar 2026 |
| 10 pCi/L | Fort Collins, CO | 21-50 Years | Partial Basement | Jul 2018 |
Have a radon test result for Fort Collins? Submit your reading to help other homeowners.
Fort Collins Radon Facts
Key details about the radon risk profile for Fort Collins and the 80521 zip code area.
Fort Collins and the 80521 zip code are located in Larimer County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.
Radon FAQ for Fort Collins, CO
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Most Active Radon Markets in Colorado
Cities with the most user-submitted radon test data in the state.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Fairplay | 12.00 pCi/L | 9 |
| Crested Butte | 8.56 pCi/L | 9 |
| Denver | 6.22 pCi/L | 9 |
| Montrose | 9.25 pCi/L | 8 |
| Gunnison | 7.38 pCi/L | 8 |
| Buena Vista | 12.57 pCi/L | 7 |
| Pueblo | 10.67 pCi/L | 6 |
| Grand Junction | 8.17 pCi/L | 6 |
| Bayfield | 6.00 pCi/L | 6 |
| Canon City | 10.80 pCi/L | 5 |
| Aurora | 7.40 pCi/L | 5 |
| Windsor | 7.00 pCi/L | 5 |
| Telluride | 6.80 pCi/L | 5 |
| Parker | 5.40 pCi/L | 5 |
| Salida | 15.50 pCi/L | 4 |
| Johnstown | 9.50 pCi/L | 4 |
| Granby | 9.00 pCi/L | 4 |
| Longmont | 8.00 pCi/L | 4 |
| Edwards | 6.75 pCi/L | 4 |
| Mancos | 6.00 pCi/L | 4 |