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When we set our clocks back an hour on November 2 (with the end of Daylight Saving Time), it’s a good opportunity to test our smoke/carbon monoxide detectors to make sure they’re operating properly (and to contact �鶹�� if they are not functional or need to be replaced).

Combination smoke/carbon monoxide alarms with sealed 10-year batteries are installed at �鶹�� properties, and �鶹��’s Environmental Health and Safety Department (EHS) would like to share the following information on how they can help keep you and your family safe.  

What Is Carbon Monoxide?

Carbon monoxide (CO) is a colorless and odorless gas that is produced when gasoline, natural gas, oil, kerosene, wood, charcoal, and other fuels are burned; it can emanate from water heaters, fireplaces, and stoves and can reach dangerous levels indoors or outdoors. Breathing CO reduces the blood’s ability to carry oxygen.

Carbon Monoxide Poisoning Symptoms

People with carbon monoxide poisoning often report feeling sick and having feelings of malaise which continues to worsen. The most common symptom of carbon monoxide is a headache. Other symptoms may also include dizziness, chest pain, nausea, and vomiting.

If you think that you or your family are being exposed to CO emissions or are experiencing CO poisoning, call 911 immediately.

Virtual workshops on how to prevent carbon monoxide poisoning are being offered on November 5 (in English) and November 6 (in Spanish and Cantonese). Visit to register.

Safety Guidelines

• If your smoke/carbon monoxide detector sounds an alert, leave immediately and call 911. Fire spreads fast—working alarms give you an early warning so you can get outside quickly.
• Every time that �鶹�� maintenance staff enter an apartment, they must check the smoke/carbon monoxide detectors to ensure that they are operational.
• Test all detectors at least once a month by pressing the “test” button to be sure they are working. 
• If you have any detectors with removable batteries, contact �鶹�� to have them replaced with alarms that contain sealed 10-year batteries.
• �鶹�� will replace the alarms every 10 years (or whenever alarms are damaged by a fire or other issue).

If you do not have a working smoke/carbon monoxide detector in your apartment, submit a work ticket using or by calling the Customer Contact Center (CCC) at 718-707-7771.

If you have questions about this or any environmental health and safety matter, please email ehs@nycha.nyc.gov. Residents, employees, and any member of the public can submit environmental health and safety concerns at .

For more information on smoke and carbon monoxide safety, please visit: