Maple Leaf Radon Defence is your trusted resource for radon testing and radon mitigation in Ontario and the Greater Toronto area. We are your local indoor air quality expert, and you can count on our team to deliver high-quality, effective solutions for your home and budget. We proudly serve homeowners throughout Greater Toronto, including Mississauga, York, Toronto, Vaughan, Markham, Brampton, Oakville, Burlington, Oshawa, Richmond Hill, and nearby in Ontario. more... See more text