Residents of Washington, DC, on Sunday briefly experienced the worst air quality of any major city in the world, according to ...

President Donald Trump’s America 250 celebration may have left some Washington, D.C. residents trapped indoors as the ...

After a fireworks show lit up the nation's capital to celebrate America 250,, the Washington, D.C. area is under an air ...

An air quality alert has been issued for the D.C. area by the Metropolitan Washington Council of Governments and District ...

Historic fireworks and light winds could leave D.C. with hazy skies and reduced air quality Saturday night. Here's what the weather says to expect.

The Fourth of July fireworks display in the capital impacted the amount of fine particulate matter in the atmosphere.

WASHINGTON — The air quality is showing signs of improvement Saturday afternoon after starting with unhealthy air. As of noon, DC was still in code red, but surrounding areas are now in yellow or ...