Friday morning, Chicago's air quality showed a PM 2.5 of 157. Typically, anything above 100 is considered to be hazardous to at least some groups, and anything over 150 is considered to be “unhealthy, ...

The Chicago Cubs called up prospect Moisés Ballesteros and started him as their designated hitter as the corresponding move for designating infielder Vidal Bruján for assignment.

The Chicago White Sox traded outfielder Austin Slater to New York Yankees for minor-league pitcher Gage Ziehl on Wednesday.

The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday, July 15. Here's what to know before heading out the door.

Pollen and Air Quality forecast for Chicago, IL with air quality index, pollutants, pollen count and pollution map from Weather Underground.

CHICAGO (WLS) -- Most of the Chicago area remains under an Air Quality Alert on Saturday due to smoke from Canadian wildfires ...

"The air quality is officially dangerous in Chicago," says Brian Urbaszewski, director of environmental health programs at ...

The hazy skies in the Chicago area are the visible sign of the poor air quality Thursday as smoke from Canadian wildfires ...