Most new tire retailers will safely dispose of your trade-in tires at the time of purchase for a nominal fee, as required by the State of Illinois.

They may also accept old tires for a fee.

Household Hazardous Waste Site
3333 Kishwaukee St., Rockford IL 61109
Open weekends only when not a holiday. No phone.
Free drop off of up to four tires per day per vehicle. Illinois residents only.
You must unload and place in truck.