Researchers from Harvard T.H. Chan School of Public Health have assembled a national database with millions of multi-day indoor radon measurements from 2001 to 2021. Findings reveal that nearly 25% of ...

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

[Perhaps} it may have a type of rock that isn’t high on uranium.” In almost 14% of homes in New York, radon levels are at or above 4 picocuries per liter. This is known as the action level.