National Grid
Gas Safety Our gas service crews continually test, repair and improve the underground system that delivers your natural gas. Despite our best efforts, however, the possibility does exist for a gas leak in or near your home. A gas leak can occur when the ground heaves as water in it freezes and thaws. Gas could also escape from faulty or improperly operated home appliances.

A harmless odor (it smells something like a rotten egg) is added to natural gas so you can tell if there is a gas leak in or near your home.

Anytime you suspect a natural gas leak, take immediate action:
  • If it is a faint odor, call our gas emergency number at 1-800-892-2345.
  • If the gas odor is strong, or if you hear a hissing sound, get all occupants out of the house immediately and call the gas emergency number from a neighbor’s house. Do not call from your house or use the phone for any reason. Also, do not strike a match or switch lights or appliances on or off.
  • Never try to put out a fire you suspect may be caused by escaping gas. Leave immediately.
  • Do not return to your home until we tell you it is safe.
Related Information

Natural Gas Pipeline Safety: What You Need to Know (pdf)