An Illinois Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups (USG) category of the Air Quality Index for all or almost all of Illinois.

Good afternoon, Chicago. Air quality alerts issued today in Illinois because of Canadian wildfire smoke marked the latest bout in an increasingly common summer occurrence. The alert covers 34 Illinois counties designated as having unhealthy air for all residents.

An air quality alert in the Chicago area has been extended for another day as Canadian wildfire smoke continues to plague the area.

Air quality alerts issued Thursday in Illinois because of Canadian wildfire smoke marked the latest bout in an increasingly common summer occurrence. The alert covers 34 Illinois counties designated as having unhealthy air for all residents.

There’s another air quality alert for Minnesota on Monday, a trend we’ve seen all summer. Health officials say the unhealthy air should be taken seriously, especially as high school football practice begins.

An air quality alert for the Chicago area was extended for a second time as smoke from Canadian wildfires lingers overhead Saturday. The National Weather Service extended an air quality alert for Chicago through Sunday night,

An Illinois “Air Pollution Action Day” is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups (UGS) category of the Air Quality Index for all or almost all of Illinois.

Air quality forecast for August 11th from the MPCA predicts unhealthy air for everyone in the northern half of Minnesota.