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, ...

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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Air Quality Numbers Explained: As pollution in Delhi continues to rise without pause, residents are constantly checking the AQI levels to decide when it might be safe to step outdoors. Air Quality ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. The U.S. Air Quality Index (AQI) is the ...

When the air won’t circulate, then “regardless of what they’re looking at, when certain levels reach a critical value, they ...

Air quality in Los Angeles has improved as the Palisades and Eaton wildfires get under control. But as the fires burned through houses, cars and industrial areas, they spewed out vast amounts of smoke ...

Ruth Benedict wondered why the weather app on her phone would frequently show a “bad air quality” reading. And, the Geneva ...