
Radon is colorless, odorless, naturally occurring and your home can pull it in through foundation cracks and openings without you ever knowing it's there. The EPA calls it the leading cause of lung cancer in non-smokers

Radon testing requires more patience than most air quality tests. Doors and windows stay closed during the testing period, typically 2 to 7 days, and in some cases up to 90. This is to prevent outside air from skewing your results. The EPA's action threshold is 4 picocuries per liter (pCi/L). If your home tests above that, mitigation is worth a serious look. If it doesn't, you'll know that too. Our goal is to provide you with the clarity and confidence of the radon levels in your home.

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We’re proud to serve homeowners throughout Western Washington from Bellingham and Whatcom County down through Skagit County and the greater Puget Sound region. The PNW’s climate creates real air quality challenges for real families. We’re here to help you face them clearly.


When you decided to work with The Mold Marshal, you're selecting a premium indepedent partner, not a transactional vendor. Schedule your test today and get lab-certified results from your neighborhood protector.