Any home can have high radon levels. However, some areas in Southeast Michigan are more vulnerable. Click the button on the right to see a list of the high-risk radon zones in our service area and see if this applies to your property. Michigan Radon Defense is your trusted National Radon Defense University and National Radon Proficiency Program-certified mitigation company offering radon testing, radon mitigation, air purification, dehumidifiers, and other indoor air quality solutions.