Radon is a colorless and odorless radioactive gas that exists in the soil in and around the Washington Dc Metro area, it seeps into homes and can be at harmful levels. It is believed to be one of the leading causes of lung cancer behind smoking. Radon inspections at NextDay Inspect® are performed by professionals certified by AARST and NRPP. Professionals utilize ANSI best practices for radon measurement. We'll ensure that your home is safe for even your most sensitive family members. The test takes 48 hours using our equipment.