Radon is a naturally occurring radioactive gas that comes from the decay of uranium in soil, rock, and water. It is a colorless, odorless, and tasteless gas, and when inhaled radon continues to break down into radioactive elements that can be harmful to the lungs. Contact ECOH, It has Canadian National Radon Proficiency Program (C-NRPP) Certified Radon Measurement Professionals on their team. https://www.ecoh.ca/occupationalhealthsafety/