Despite its prevalence, there is no known level of radon that is safe, according to the Centers for Disease Control and ...

Air quality maps are regularly updated. "You can find daily ozone forecasts and real-time ozone conditions for over 300 cities across the country at the AIRNow Web site: airnow.gov," the EPA says.

The EPA Radon Zone Map, published in 1993, was based on limited data and intended to indicate predicted average indoor radon levels by county and not for site-specific risk evaluation.

Brian Hanson, the director of Kansas State University’s radon programs and the operator of the National Radon Program Services Center, said the EPA first published the map in 1993 and has not ...

Most Western Pennsylvania counties are in radon zones 1 or 2, according to the EPA, meaning they have the highest potential for elevated indoor radon levels.

The Environmental Protection Agency maintains a map of radon risks for each county/city in the U.S. Unlike other states in the highest risk zones, Virginia does not require radon tests during real ...

More information: Longxiang Li et al, High-resolution national radon maps based on massive indoor measurements in the United States, Proceedings of the National Academy of Sciences (2025).

A new map has revealed that up to 25 percent of Americans live in areas where radon levels are considered unsafe by the Environmental Protection Agency (EPA). Are YOU in the danger zone?

About 1 out of every 10 homes in Wisconsin has high levels of radon gas, which is the leading cause of lung cancer among non-smokers in the U.S.

The Wisconsin Department of Health Services is urging residents to test their homes for radon, a naturally occurring gas that causes lung cancer. About 1 out of every 10 homes in Wisconsin has high ...