And not only did the air quality in the Chicago metropolitan area receive a failing grade for ... which is included in this year’s report for the first time, brought improved conditions to ...

The Illinois Environmental Protection Agency issued an Air Pollution Action Day for the Chicago Metropolitan area, in effect until midnight Monday night. The combination of hotter-than-normal ...

Air quality in the Chicago metropolitan area also received a failing grade, and was ranked 13th worst metro area in the nation. The rest of the state didn't fare much better. Of 23 counties where ...