The city is racing to put up 277 sensors. Once installed, Chicago will have the most high-quality air monitors in the country ...

Concern for poor air quality in the greater Chicago area remains as the Illinois EPA extends its alert until Thursday night.

Editor's Note: An air quality alert has been issued for northwest Indiana, starting at midnight and continuing in Tuesday. Air quality across the Chicago area is once again in the "unhealthy ...

"The air quality is officially dangerous in Chicago," says Brian Urbaszewski, director of environmental health programs at the Respiratory Health Association. "It's going to send people to the ...

The air quality in Chicago around 4:30 p.m. Thursday was the second worst in the world, behind Kinshasa, the capital of the Democratic Republic of Congo, according to IQAir’s live ranking.

Chicago experienced the worst air quality in the world on Thursday due to smoke from Canadian wildfires, which can trigger asthma attacks, strokes, and heart attacks, and people are advised to use … ...

ABC7 Chicago is now streaming 24/7. Click here to watch The Illinois Environmental Protection Agency previously issued an Air Pollution Action Day for Wednesday for the Chicago area.

An air quality alert was issued for the greater Chicago area on Tuesday. ABC7 Chicago is now streaming 24/7. Click here to watch The Illinois EPA issued an Air Pollution Action Day for Wednesday ...

You can find tips for lowering pollution levels here. On July 31, Canadian wildfire smoke brought the worst air quality in the world to Chicago.