How to dispose of smoke detectors
Most smoke detectors can go in your household trash. That includes ionization detectors, the kind with a tiny radioactive source: EPA says there are no special disposal instructions for them, and they may be thrown away with household garbage unless your community runs a separate recycling program.
Short answer
- Household trash is fine, per EPA — even for ionization detectors.
- Take the battery out first and handle it separately — our battery guide covers where it goes.
- Don't open or tamper with it — that's what keeps the source shielded.
- Hazardous waste sites often refuse them, so don't make a special trip without calling.
The radioactive part
Ionization detectors contain a small americium source sealed in foil and ceramic. According to EPA, the shielding stops its alpha particles from leaving the detector, so it poses no health threat as long as it isn't damaged and is used as directed. EPA's advice is never to tamper with a detector or try to remove the americium.
EPA also notes that most detectors are certified for a useful life of ten years — a good reminder to check the date on yours. Our guide to battery disposal covers the batteries.
Drop-off sites
Because they can go in the trash, many household hazardous waste programs don't take them: Durham, North Carolina, Dane County, Wisconsin, Omaha, Knoxville and Monmouth County, New Jersey all list smoke detectors among items they won't accept. A few take them anyway: Oakland, Maine collects them free.