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Data: IQAir; Note: Among cities with at least 500k metro-area residents; Chart: Kavya Beheraj/Axios Philadelphia's average air quality got worse in 2023, according to the World Health Organization ...

Philadelphia officials say residents of the city's Frankford section can return to their normal routines after a massive fire at an industrial building on Christmas Eve prompted air quality concerns.

the Philadelphia Department of Public Health sent out a warning for residents Wednesday to stay inside. But after collecting air quality samples, city officials gave the all-clear Thursday ...

PHILADELPHIA (WPVI ... TUESDAY: As a clipper and its cold front move by to our north we'll pull some milder air our way leading to a high of 42. Expect more clouds than sunshine.

A huge 3-alarm fire that burned out-of-control about five hours late Tuesday night into Wednesday caused potential air quality concerns, but the surrounding air has been deemed safe for nearby ...

so those are not safe to use during times of poor air quality. Other recommendations for keeping your home's air clean include avoid using fireplaces, candles, incense, grilling and gasoline ...

Zoom out: Columbus, Ohio, had the worst air quality in 2023 in U.S. cities with at least 500,000 residents (13.9), followed by the Lancaster, Pennsylvania metro area (13.6).