Have you tested your carbon monoxide (CO) alarms this month? • Test CO alarms at least once a month. Replace any alarm that does not sound when tested. • A single chirp every 30 or 60 seconds means the battery is low and must be replaced. • If chirping continues after replacing the battery, replace the alarm. Make sure everyone in the home understands the sounds of the smoke and carbon monoxide alarms and knows how to respond. November is #COAwarenessMonth. Learn more: nfpa.o