4.9 (4095 Google reviews)
Certified RMP/RMS
Radon Pros in Colorado
111 contractorsEPA zone context: Most of Colorado's Front Range corridor is EPA Zone 1 — the highest risk classification. Colorado has one of the highest radon testing rates in the country.
About Radon in Colorado
Last updated: March 2026
Colorado is one of the highest-risk states for radon in the United States. According to EPA mapping, most counties along the Front Range corridor — from Fort Collins through Denver to Colorado Springs — are classified as Zone 1, the highest predicted indoor radon potential. The combination of uranium-rich granitic bedrock, high altitude (which reduces atmospheric pressure and increases soil-gas draw), and cold winters that keep homes tightly sealed creates conditions that routinely produce indoor radon levels well above the EPA action level of 4.0 pCi/L. Colorado requires radon mitigators to register with the Colorado Department of Public Health and Environment (CDPHE), though national NRPP or NRSB certification is not state-mandated. In real estate transactions, radon testing is not legally required but is extremely common — most buyers' agents along the Front Range recommend it as standard due diligence. What makes Colorado's radon situation distinct is the geographic concentration of risk: the same mountain geology that defines the state's landscape is the primary driver of elevated indoor radon. Homes in Boulder, Jefferson, and Douglas counties frequently test above 10 pCi/L, and post-mitigation verification testing is considered essential.
Typical Mitigation Cost in Colorado
$1,400–$3,000
Above national average
- • Foundation type (basement vs. slab vs. crawlspace)
- • Number of suction points needed
- • Pipe routing complexity through finished spaces
- • Local labor rates along the Front Range
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Popular Cities for Radon Mitigation in Colorado
Radon mitigation in Colorado Springs, Colorado13 local contractors listedRadon mitigation in Denver, Colorado9 local contractors listedRadon mitigation in Aurora, Colorado8 local contractors listedRadon mitigation in Lakewood, Colorado6 local contractors listedRadon mitigation in Fort Collins, Colorado5 local contractors listedRadon mitigation in Englewood, Colorado4 local contractors listedRadon mitigation in Littleton, Colorado4 local contractors listedRadon mitigation in Longmont, Colorado4 local contractors listedRadon mitigation in Castle Rock, Colorado3 local contractors listedRadon mitigation in Grand Junction, Colorado3 local contractors listedRadon mitigation in Parker, Colorado3 local contractors listed
Other areas with radon contractors
Metro Areas in Colorado
What to Do Next
Three steps to address radon in your Colorado home.
Frequently Asked Questions: Radon in Colorado
Radon Guides for Colorado
Articles and guides to help you understand radon risk and make informed decisions.
Buying a Home in Colorado? What to Know About RadonWhat Does Radon Mitigation Cost? A Homeowner's GuideRadon Levels by State: Where Is Radon Most Common?What Radon Level Is Dangerous?
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State Resources for Colorado
Radon mitigation cost in Colorado
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Radon testing guide for Colorado homes
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Radon levels and EPA zones in Colorado
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ZIP-level radon risk in Colorado
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