Air quality is currently in the "unhealthy" category around the Lassen National Forest in California, an AirNow map shows.

A portion of California faces potentially unhealthy levels of air pollution early Saturday, official data shows.

WASHINGTON (Reuters) -The U.S. Environmental Protection Agency said on Wednesday it has approved California's landmark plan to end the sale of gasoline-only vehicles by 2035. The decision in the final ...

The Trump administration on Wednesday announced it is opening an investigation into the California Environmental Protection Agency, including the powerful California Air Resources Board, over ...

New records show toxic 'forever chemicals' have recently tested above EPA limits in hundreds of cities and towns. Check your ...