Radon is a naturally occurring radioactive gas that is invisible, odourless and tasteless. It is formed by the breakdown of uranium and can enter a home via entry points in a basement floor, such as cracks, floor drains and sump pits. Radon becomes a problem when it collects in high concentrations and creates a significant health risk for building occupants. Radon does not differentiate between an old or new home or a large or small one. In our well-sealed homes it can enter faster than it escapes, resulting in elevated levels and an increased health risk. Radon gas is found everywhere, the question is what are the levels? The only way to know is to test. Radon is measured in a units called Becquerels per meter cubed (Bq/m3). Health Canada’s current action level for mitigation/radon reduction is 200 Bq/m3.