This Flagstaff, Arizona area home had an average Radon level of 22 pCi/L. We were able to install a Radon Mitigation System to reduce the Radon levels in this home. The U.S. Surgeon General has recommended that every home be tested for Radon & action should be taken when levels exceed 4 pCi/L.
Read more about the dangers of Radon here: https://www.epa.gov/radon/health-risk-radon