Since radon is a radioactive material, the SI unit used to represent its activity is becquerels per cubic meter. One becquerel is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. Therefore, the becquerel is equivalent to an inverse second (s-1) and becquerels per cubic meter is equivalent to s-1m-3. In some situation, the older non-SI unit, pico-curie per liter(pCi/L) is still used, where (1)
Although there is currently no regulation that governs an acceptable level of radon in Canadian homes, Health Canada, in partnership with the provinces and territories, has developed a guideline. The current Canadian guideline for radon in indoor air for dwellings is 200 bequerels per