Natural Gas Pipeline Safety | National Grid
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Did you know natural gas pipelines are the safest energy transportation system in the United States? We ask for your help in keeping them safe.

Respecting Rights of Way


Most of our pipelines run under public roads, but they do sometimes cross under private property. To protect both the pipelines and the communities they run under from potential accidents, we establish strips of land along a pipeline’s path called rights of way (ROWs). A ROW is usually indicated with a marker that displays the approximate location of the pipeline, the material transported, the operator’s name, and an emergency telephone number. A ROW can measure from 25 to 150 feet wide and prohibits permanent structures such as:

  • Houses
  • Trailers
  • Mobile homes
  • Poles, decks
  • Trees
  • Tool sheds
  • Garages
  • Swimming pools
  • Septic tanks

Pipes on Your Property

It is your responsibility to maintain and let us know about any gas lines that begin at the outlet of the gas meter and extend either above or below ground on your property. Buried gas lines need special attention because they can corrode or leak if not properly maintained. Here are a few examples:

  • Outside gas lighting
  • Gas heaters for pool or hot tub
  • Natural gas barbecue
  • Gas-fired generators
  • Detached building with gas appliance(s)

To properly care for a buried pipe, we recommend you hire a professional plumbing/heating contractor or leak survey and corrosion expert. The recommendation is to have the pipe inspected periodically for leaks or corrosion. If unsafe conditions are found, the pipeline should be repaired immediately at the customer’s expense.

Sewer Pipe Blockage


Natural gas utilities across the country have discovered locations where natural gas pipes or other utilities such as communications and electric wires were accidently installed through sewer pipes, something known as a “cross bore.” Cross bores aren’t a safety hazard on their own, but natural gas leaks can occur when equipment is used to unclog sewer pipes. A leak could result in a fire or explosion, possibly causing injury or death, so it’s important to have a professional inspection of sewage blockages before attempting to clear them. Learn more about cross bore safety.

Excess Flow Valve Notification

Did you know you can request installation of an Excess Flow Valve (EFV) on your existing gas service line under certain circumstances? For more information,  call National Grid at 781-907-2958 or send an email.

Call Before You Dig

Before beginning any excavation activity, Call 811.

Suspect a Leak?

If you smell natural gas or see a white cloud, mist, fog, or bubbles in standing water, or any other signs of a gas leak, immediately report the situation to 911 or 1-718-643-4050.