Disposing of your old smoke/carbon monoxide alarm requires that you follow laws and regulations for your area. Here are some resources to help.
Contact your local fire department
Different states and regions have different rules about recycling smoke and carbon monoxide (CO) alarms. You should contact your local fire department to find out if there are any local laws or regulations restricting the disposal in your area.
Dispose of ionization smoke alarms properly
If your old smoke alarm uses ionization sensors to detect smoke, it contains a small amount of Americium 241, a radioactive isotope. In normal use, these alarms are considered safe, as the radioactive material is shielded by a metal chamber inside the device. However, if the alarm is dismantled, crushed, or incinerated, the radioactive material can become exposed.
Google Nest Protect only uses photoelectric sensors and does not contain any radioactive material.
Recycle old batteries
When disposing of your old smoke or CO alarm, make sure to remove the batteries and recycle them appropriately. Contact your local waste management company to find out how to recycle batteries in your area.
Learn more about recycling your old smoke/CO alarm.