Radon levels high in Virginia!
Updated: Sep 22, 2019
I find levels above the mitigation level of 4.0 picocuries per liter in about 20% of the homes I test. So far my record is 15.4! Radon is odorless and colorless so it's easy to take for granted, yet the EPA has determined it is the second leading cause of lung cancer in the U.S. The good news is it's easy to test for; you can get a permanent monitor, like for carbon monoxide, another odorless, colorless gas; and relatively simple to get out of your house. See other posts with the RADON tag.
Red zones have a high potential and yellow a medium potential. DC has relatively low potential except near wooded areas.