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Certified radon testers and mitigators in Colorado

480 certified radon testers and mitigation contractors in Colorado, from the state's official list or the national NRPP directory.

50 cities & counties480 certified pros

Pros in this state come from the NRPP national certification directory (checked Oct 28, 2026). Get Radon Quotes is independent and not affiliated with NRPP. Some states also require a state license, so confirm with your state radon office before you hire. Your state radon office.

Major cities

Denver 49Colorado Springs 34Littleton 25Aurora 24Lakewood 18Fort Collins 17Arvada 15Castle Rock 15Parker 15Westminster 15Centennial 13Thornton 11

Counties in Colorado A–Z

Smaller counties in Colorado

Counties with only a few listings so far, grouped by county.

Custer County 1

Delta County 2

Elbert County 2

Fremont County 1

Kit Carson County 1

Las Animas County 1

Logan County 1

Moffat County 1

Morgan County 2

Park County 2

Get free quotes from up to 3 certified radon pros near Colorado

Tell us what you need and where. We send your request to up to 3 certified pros near you who offer that service, and they contact you directly.

What happens next

  1. We match your ZIP to certified pros nearby who offer the service you picked.
  2. Each pro gets your request and contacts you directly, usually within a business day.
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Prefer to choose yourself? Every certified pro is listed above with their phone number.