The index rates how clean or polluted the air is each day. The EPA uses this measure to keep tabs on five kinds of air pollutants. The main concern from the wildfire smoke is fine particle pollution, ...

A doctor at National Jewish Health explains what different Air Quality Index (AQI) readings mean for you.

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

WELL, GOOD EVENING MIKE. AND YEAH, IT’S NOT JUST A HOT DAY HERE IN THE CITY OF PITTSBURGH AND ACROSS WESTERN PENNSYLVANIA, BUT ALSO A LITTLE BIT MORE DIFFICULT TO BREATHE FOR SOME SENSITIVE GROUPS ...

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Firefighters work inside a burned structure. After California’s Eaton fire was suppressed in January, invisible gases continued to permeate the air, exposing residents and first responders to ...

Parts of Southern California will be under an air pollution advisory this weekend due to Fourth of July fireworks. Fireworks ...