Recognizing a Natural Gas Leak

Signs of a natural gas leak may include any or all of the following:

  • Smell: You may smell a “rotten egg” odor. KUB adds a distinctive, pungent odor to our natural gas supply to help you recognize it quickly. You can request a scratch-and-sniff bill insert, which also contains important safety information from this section, or pick one up at KUB Payment Centers.
  • Sound: You may hear a blowing or hissing sound near a natural gas appliance or a roaring sound near a gas line.
  • Sight: You may see bubbling in a wet or flooded area, dry spots in moist areas, or vegetation that is dead or discolored for no apparent reason. Flames will be visible if a leak is ignited.

How to Report a Natural Gas Leak

If you need to report natural gas service trouble, please do not e-mail KUB. Instead, call 865-524-2911 to help ensure a rapid response. [Note: If you suspect a gas leak inside your home, leave immediately and call KUB from another location.]

Your personal safety is top priority. If you suspect a natural gas leak (inside or outside), please follow the safety steps below:


  • Leave the area (inside or outside) immediately, and tell others to leave, too.
  • Go to a safe location away from any signs of a leak.
  • Call KUB at 865-524-2911 right away. We will send a trained technician to perform a free natural gas leak inspection.


Don't do any of the following things that could cause a spark, igniting the gas:

  • Don't switch lights or appliances on or off.
  • Don't use any telephone—including cordless or cellular phones.
  • Don't use any electrical devices, including appliances, doorbells, and garage door openers.
  • Don't smoke or use matches or lighters.
  • Don't start or stop a nearby vehicle or machinery.
  • Don't attempt to turn natural gas valves on or off.
  • Don't re-enter the building or return to the area until KUB tells you it is safe to do so. Remember: Your personal safety is top priority.