Recognizing and Responding to a Leak

Pipelines are, statistically, the safest way to transport energy products like natural gas. However, as with any method of transportation, accidents can happen. In the event of a pipeline emergency, it’s important you know the warning signs and protect yourself.​

When natural gas is transported through a transmission pipeline like Alliance, it is odorless. An odor similar to rotten eggs is added when the gas enters a distribution pipeline system to your home, allowing you to detect a leak. Signs of a natural gas leak include:​

  • An odor similar to rotten eggs, diesel, oil or propane
  • A loud whistling or roaring sound
  • A steam-like cloud
  • Unexpected frost on the ground
  • Bubbling in wet areas
  • Dying vegetation along the right-of-way

​Actions to Take in the Event of a Pipeline Leak​

​DO NOT

  • Operate phones or electrical devices
  • Start vehicles or machinery​ in the area
  • Come into contact with leaking substances

​​DO​

  • Extinguish/eliminate ignition sources, like cigarettes or machinery
  • Alert others in the vicinity
  • Leave the area immediately on foot, in an upwind direction​

Remember: if it’s too hot or too loud, you’re too close.​ If you suspect a leak, immediately leave the area on foot. Call 911 and follow their instructions.​​

SIGNS OF A NATURAL GAS LEAK

ear icon

Unusual hissing, whistling or roaring

nose icon

Unlike the natural gas delivered to your home, odorant is not added to gas on the Alliance system. However, a leak on the Alliance system may have a natural petroleum smell.

eye icon

Steam-like cloud, frost on the ground, dirt blowing from the ground

Bubbling in wet areas

Dead or discolored vegetation​​​​​​​​​