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

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

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

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

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

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

The National Weather Service has issued an air quality alert for parts of the Midwest including the Chicago area as unhealthy smoke from Canadian wildfires continues to move south. The alert, issued ...

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

Users across Chicago were met Wednesday with warnings from their smartphones about the city’s air quality that led to much confusion, but was the air quality actually that bad? Across social ...

The Illinois EPA declared an Air Pollution Action Day in the Chicago metro area. See today's air quality index forecast for Illinois.

Wildfire smoke puts Chicago among cities with worst air quality in the world It’s the latest in a series of smoke invasions from Canada this month.

Canadian wildfire smoke is infiltrating the Midwest on Tuesday, and the air in Chicago has deteriorated to the Air Quality Index's "very unhealthy" category.