Carbon monoxide detectors don't last forever. Most manufacturers recommend replacing a CO detector after 5–10 years, although the manufacturer's instructions should always be followed.

So what should you do with the old one?

Start by Checking the Battery

If the detector has a removable battery, take the battery out before disposing of the detector.

Alkaline battery: Ordinary alkaline batteries, including the 9-volt batteries commonly used in alarms, may be placed in household trash in New York State. OCRRA recommends putting clear tape over the terminals of a 9-volt battery before disposal to prevent an accidental short circuit.

Rechargeable or lithium battery: Don't put these batteries in the trash or your recycling bin. OCRRA provides numerous locations throughout Onondaga County where residents can recycle these batteries.

Not sure what kind of battery you have? Read the label on the battery. If you're still unsure, OCRRA provides battery-disposal guidance and can be contacted at 315-453-2866.

What About the Detector Itself?

A CO-only detector is not something that belongs in your household recycling bin. OCRRA's online disposal database provides current instructions for individual items, and its guidance is the best source to check before putting an unusual household item in the trash.

What If It's a Smoke/CO Combination Alarm?

That's different. Do not take an old smoke alarm to an OCRRA Household Toxics collection. OCRRA specifically lists smoke alarms among the items it does not accept through that program.

Some smoke alarms use a tiny amount of the element americium-241 as part of their sensing system. There is no radiation hazard from an intact household smoke alarm when it is used and handled normally. Never open, dismantle or attempt to remove anything from a smoke alarm.

And One Final Reminder

When replacing an old CO detector, install the new detector before removing the old one from service.

Carbon monoxide is colorless and odorless, and a working CO detector is an important part of protecting your household.

For current local disposal information, visit OCRRA.org and use its How Do I Get Rid Of...? search tool. Waste-management rules can change; so check OCRRA's current guidance before disposing of an unfamiliar alarm or battery.