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How to recycle your old smoke + CO alarm

When you dispose of your old Google Nest Protect or other smoke/carbon monoxide (CO) alarm, you are required to follow disposal laws and regulations for your area. Here are some resources to help.

Recycle your Nest Protect

If you have a Nest Protect in the US, you can send your old Protect to Google through our recycling program, and we will responsibly recycle it for you.

Google hardware sustainability

If you have a Nest Protect in another country, or if you have some other kind of old smoke/CO alarm, you can read the tips below for more information about proper disposal.

Tips to properly dispose of your smoke/CO alarm

Contact your local fire department

Different states and regions have different rules about recycling smoke/CO alarms. Contact your local fire department to find out if there are any local laws or regulations that restrict the disposal in your area.

Dispose of ionization smoke alarms properly

Smoke alarms that use ionization sensors to detect smoke contain 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, you should not dismantle, crush, or burn smoke alarms with ionization sensors, as the radioactive material can become exposed.

Contact your local hazardous waste collection center or the original manufacturer of the smoke alarm for more information on how to properly dispose of the device.

Note: Nest Protect only uses photoelectric sensors and does not contain any radioactive material.

Recycle old batteries

When you dispose of your old smoke/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.


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