Find Out If Your Property Has Elevated Radon Levels SCHEDULE PROFESSIONAL RADON TESTING IN BILLINGS, MONTANA Radon is an odorless, tasteless and invisible radioactive gas that is typically found in soil, bedrock and water. Although it's naturally occurring, it can contribute to health problems like lung cancer. Professional radon testing is the only way to determine if you're dealing with unsafe radon levels. Certified Radon Services offers radon testing to Billings, MT-area property owners. During your radon inspection, we'll use state-of-the-art equipment to measure the radon levels in your home or office building. Call 406-656-8400 today to schedule radon testing services.