11/01/2026
You've changed your clocks -- but have you checked your alarms? The manufacturing date is printed on the back. Replace smoke alarms after 10 years and CO alarms after 5, 7, or 10 years depending on the model. And if your alarms take alkaline batteries, replace them to stay safe this winter.
Choosing a new alarm? Select one from a well-known national brand with a sealed, long-life battery and a hush feature. Devices that meet UL Standard 217, 8th edition or later, will reduce nuisance alarms caused by cooking smoke. Learn more: https://www.mass.gov/news/fall-back-into-safety-when-you-change-your-clocks-check-your-alarms