Illinois Unknown Air Quality Alert | Effective 07/13/2026 09:44
The Illinois Environmental Protection Agency has issued an Air
Pollution Action Day for Tuesday July 14th for the greater Chicago
Metropolitan Area and is in effect through Tuesday night.
An 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 category of the
Air Quality Index for multiple days.
Active children and adults, especially people with pulmonary or