County Fireworks Ordinance 07-09:
-Between the hours of 5:00pm and two (2) hours after sunset (Chicago area sunsets are at approximately 8:30pm) on July 3, 5, 6, 7, 8, 9
-Between the hours of 10am and 12am on July 4th
-Between the hours of 10am on December 31 and 1am on January 1
During these dates and times, Officers will NOT be dispatched unless: there is injury, property damage, the fireworks are being set off in a reckless/dangerous manner, fireworks being thrown from a moving vehicle; dispatch as a suspicious vehicle complaint.
Remember to check with the city you live in for their local city ordinance, as they may differ.