You will need to know if your aerosol can is still under pressure or contains hazardous material before you can determine how to dispose of it.
Empty aerosol cans
Empty aerosol cans that contained non-hazardous materials can be put in the recycling ONLY if the can is completely emptied of contents and pressure. These include: cooking spray, whipped cream, dry shampoo, sunscreen, etc.
Aerosol cans that contained hazardous materials can be placed in the garbage when they are completely empty of contents and pressure. These include: insect spray, fuel, paint, mace, etc.
Pressurized aerosol cans containing hazardous material
Aerosol cans that are still pressurized and/or contain hazardous material need to be collected by Environmental Health & Safety (EH&S). Please request a chemical waste collection.