Chicago is back in the world’s top 10 major cities for poor air quality — No. 7, as of Monday. The world Air Quality Index lists the city’s air as “unhealthy for sensitive groups.”

As of Thursday morning, Chicago, Detroit and Washington, D.C. were ranked as the three cities with the worst air quality in the world, according to IQ Air's Air Quality Index.

The World Air Quality Index reported, Chicago had the worst air quality on Tuesday. That group marked Chicago's air "unhealthy," and in the red zone. According to CBS 2 meteorologists, ...

ABC7 Chicago's Air Quality Tracker provides real-time updates on the latest air quality data available from government monitors across the region. ... The air quality index breaks down as follows:

Air quality map: Detroit, Chicago among Midwest cities impacted by Canadian wildfire smoke. ... Air quality index basics: How it works, what each color code means and how to stay safe.

By 12:30 p.m., the Air Quality Index had reached unhealthy levels in the entire Chicago area, with AirNow.gov showing the city with an AQI of 163, the north and west suburbs with an AQI of 158 and ...

Low: 68.   Tuesday opens with plenty of sunshine but some cottony cumulus clouds arrive on the scene by/during the afternoon. Tuesday Air Quality Alert The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday July 15th for the greater Chicago metropolitan area through Tuesday night.