According to the current Canadian guideline, the radon concentration should be no greater than 200 becquerels per cubic metre (200 Bq/m^3) for indoor air in dwellings. Radon exposure higher than the guideline presents a health risk. It is up to the home-owner to determine which radon concentration (below the Canadian guidelines, of course) they are willing to accept. Learn more about how you can test for radon in your home. 

Do you know what Radon is? It is a radioactive gas that is naturally found when the uranium in rock and soil break down. When radon is released in an indoor environment (such as inside homes) is highly problematic because it accumulates to high concentrations which can be a risk to human health. Here's what you should know about Radon gas.