Maryland's new Smoke Alarm Law went into effect on January 1, 2018. Make sure battery-only smoke alarms are replaced with sealed-in, 10-year life-long batteries. If the smoke alarms are hardwired in, they should remain in place. Smoke alarms have expiration dates - if yours haven't been replaced since 2007, it's time! Learn more.

Source: Montgomery County, MD Department of Fire and Rescue