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

Washington's air quality entered the unhealthy range after a record Independence Day fireworks display released large amounts of smoke and fine particles into the atmosphere.

President Donald Trump's record-breaking fireworks show, which kicked off just before midnight Saturday, prompted concern among weather officials, who on Sunday issued an air quality alert citing ...

An air quality alert has been issued for the D.C. area by the Metropolitan Washington Council of Governments and District Department of Environment for Sunday. Officials issued a Code Purple for the ...