Air Quality

A hazy sky looms over palm trees and traffic along the 101 freeway near Hollywood, on June 14, 2004, in Los Angeles, California.

What Do the Most Polluted U.S. Cities Look Like?

Hint: They’re all in California, with large Latinx populations.

A plume of exhaust extends from the Mitchell Power Station, a coal-fired power plant built along the Monongahela River, 20 miles southwest of Pittsburgh, on September 24, 2013.

EPA Awards $750K Grant to Fund Air Quality Project in Pittsburgh

Day by day, residents will know pollution levels by neighborhood.