Air quality in the Chicago area has remained poor for three days in a row, the NBC 5 Storm Team reported Wednesday morning.

The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

The 'unhealthy for sensitive groups' air quality in Chicago comes as an air quality alert was issued for the entire state of ...

Besides temperatures feeling in the high 90s, Chicago and surrounding areas are under an air quality alert until midnight, ...

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

Air quality in the Chicago area remains poor for the third straight day in a row, with an air quality alert in effect through Wednesday night, along with extremely muggy conditions and the chance for ...

Chicago faces poor air quality and sweltering heat today and tomorrow, followed by scattered storms heading into the weekend.

The air quality is poor today in northern Illinois due to migrating Canadian wildfire smoke. See the AQI in your area.

The National Weather Service’s Chicago office attributed the alert to unhealthy ozone levels and lingering effects of smoke from wildfires in Canada.

Early Wednesday morning, Chicago moved to the third worst air quality in the world, behind Dubai and Detroit. High ozone levels also contributed to Chicago's poor air.

ABC7 Chicago's Air Quality Tracker provides real-time updates on the latest air quality data available from government monitors across the city and the region.