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 ...

The EPA has an action level of 148 Bq/m 3 ... "The high-resolution radon maps can be used by federal and local governments to design, update, and improve the regulations," they wrote in the ...

"Pennsylvania is probably the most radon-prone state in the country...We have results at least 25 times the EPA guideline of every county and some much more than others," said Bob Lewis ...

You can find that map below. Average indoor levels of radon in U.S. homes is about 1.3 pCi/L (picocuries per liter). While there is not a safe level of exposure to radon, the EPA recommends homes ...

Over 83 million people around the country have radon levels above the EPA "action... Map from the paper revealing average predicted community-level radon concentrations at screening floor across ...

You can find that map below. Average indoor levels of radon in U.S. homes is about 1.3 pCi/L (picocuries per liter). While there is not a safe level of exposure to radon, the EPA recommends homes ...