Smoke detectors are available in two types. One type, using ionization
chambers that contain radioactive materials, should not be placed in
the trash. For disposal options, contact the manufacturer or businesses
listed under the directory for Hazardous Waste Brokers, Transporters and Disposal Facilities
The second variety uses photoelectric cells to detect smoke; it may be
safely disposed of in the trash. Before disposal, verify the type by
checking the detector's operating manual or contacting its manufacturer.