Over 17,000 homeowners with private and municipal well water are affected by water-borne radon, according to the U.S. EPA. Radon is the 2nd leading cause of lung cancer and is emitted in homes from well water during showering, cleaning, brushing your teeth, and doing laundry. The PRO-LAB® DO IT YOURSELF RADON IN WATER TEST KIT is simple to use and utilizes patented liquid scintillation technology. Laboratory results within one week. Express service is available for an additional fee.