Not all smoke detectors are disposed of the same way, but identifying yours is easy.
Simply flip it over.
The detector type is printed on the back, telling you whether it’s a Photoelectric, Ionization, or Dual Sensor detector. Use the guide below to identify your detector and find the correct disposal option.
The front of most smoke detectors looks nearly identical. The easiest way to identify your smoke detector is by reading the label on the back or inside the mounting plate. Look for words such as Photoelectric, Ionization, or Dual Sensor.
Photoelectric Smoke Detectors
These do not contain radioactive material.
What to do:
Ionization Smoke Detectors
Ionization smoke detectors contain a very small amount of radioactive material (Americium-241), which requires special handling.
Do not:
What to do:
Dual Sensor Smoke Detectors
Dual sensor detectors contain both photoelectric and ionization technology.
What to do:
Time to Replace? Most smoke detectors should be replaced every 10 years. Check the manufacture date on the back of the detector if you're unsure.
Do not place smoke detectors in your curbside recycling or organics cart.
Photoelectric smoke detectors may be placed in the trash only after removing and recycling any replaceable batteries. Ionization and dual sensor smoke detectors require special handling and should be taken to a Marin County Household Hazardous Waste facility or returned through a manufacturer's mail-back program, if available.
