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

Average radon concentration across the contiguous United States was estimated at ... begins the journey up again as radon gas. Much of the low radon map overlays well with traditional flood ...

USGS researchers have unveiled the first map of prospective locations for hydrogen gas in the contiguous United States — and there's a lot more than they previously thought. When you purchase ...

“We spend approximately 90 percent of our lives inside the built environment, so your indoor environment impacts your ...

About 1 out of every 10 homes in Wisconsin has high levels of radon gas. In the United States, radon is the leading ... The DHS publishes an interactive map of radon test results to show where ...

Up to a quarter of all Americans live in areas where radon levels are above the "action level" set by the United States Environmental ... The researchers' map reveals the geographical distribution ...