Garbage: You can dispose of optical or photoelectric smoke detectors and carbon monoxide detectors that do not contain any dangerous or radioactive material with regular garbage.
Ionization smoke detectors contain tiny amounts of radioactive material and should not be thrown out in the trash.
Ionization smoke detectors are accepted at SAFE Disposal Events.
Manufacturers of ionization smoke detectors must accept radioactive detectors for disposal as hazardous waste. The address of the supplier is usually listed in the product warranty or user’s manual. Contact the manufacturer before mailing back a smoke detector; some manufacturers charge a fee or have special requirements if the device is no longer under warranty. Do not take the detector apart, but do remove batteries and dispose of them properly.