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

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.

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 ...

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

Smoke haze has been observed across the Grand Valley of Western Colorado, including the Bookcliff, Mount Garfield and Grand ...

Many areas across Colorado are dealing with haze on Wednesday as not only local small wildfires, but also major ones are ...

Add Yahoo as a preferred source to see more of our stories on Google. The National Weather Service in Milwaukee-Sullivan issued an air quality alert for Wednesday, June 3. This warning applies to ...