According to a new paper in the journal PNAS, over 83 million people across the U.S. live in residences with radon levels over 148 Becquerels per cubic meter (Bq/m 3). The researchers' map reveals ...

The US Environmental Protection Agency (EPA) recommends installing a radon mitigation system when the concentration in living space reaches or exceeds 148 Bq/ m 3. Efforts to map radon levels to ...

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 ...