How does radon get into our homes?
Radon comes from the mineral uranium that occurs naturally in the soil. As the uranium breaks down, it eventually releases radon. Radon is a gas, so it travels easily through the soil, working its way toward the surface. When radon escapes into outdoor air, the concentrations are low (approximately 15 Bq/m3). However, radon also escapes into our homes wherever they’re in contact with the soil; finding its way in through cracks or around pipes and drains. Here in Canada, our homes are well sealed to keep us warm in the winter, and so the radon concentration in our homes can easily build up.