Over 83 million people around the U.S. live in residences with radon levels over the EPA's action level, new data reveals.

where it concentrates and then begins the journey up again as radon gas. Much of the low radon map overlays well with traditional flood zones, in part because basements are rare in these areas ...

Up to a quarter of all Americans live in areas where radon levels are above the "action level" set by the United States Environmental Protection Agency (EPA). According to a new paper in the ...