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General Appliance Safety Gas Leaks Emergencies Extreme Weather
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Gas Leaks
Natural gas leaks are rare, but can happen anywhere. How can I tell if there is a leak?

A natural gas leak can impact you, even if you don’t have natural gas service at your home or business. It’s possible for natural gas to migrate into neighboring buildings, including those without natural gas service, so even if you’re not a YCNGA customer, leaks from nearby facilities and/or pipelines could affect you. Natural gas leaks can be handled quickly and easily if you know what to look for and what to do if you find one.


Natural gas has proven to be one of the safest of all energy sources for residential, commercial and industrial uses. Natural gas is nontoxic and lighter than air so it disperses easily into the atmosphere. Since natural gas is colorless and odorless, a distinct odor (mercaptan) is added to allow early detection in case of leakage. Mercaptan is a chemical that can tip you off to possible leaks because it smells like rotten eggs. Make sure all family members know what to do if they smell gas.



Signs of a Natural Gas Leak

Smell     A distinctive odor similar to rotten eggs

See        Pilot flame burning abnormally high

Hear      Unusual noises coming from appliances


Smell      A distinctive odor similar to rotten eggs

See         A cloud/mist, bubbles in standing water,                           blowing debris, dead/dying vegetation

Hear       A roaring, hissing, or whistling sound

If You Suspect a Natural Gas Leak:
Leave your home IMMEDIATELY!

From your cell phone or a neighbor's phone call YCNGA's 24/7 Emergency line at:


or call 911.

Do Not Operate:

Light Switches



Electrical Appliances

Remain calm, and do not use anything that could create a spark.


 Odor Fade

Even though a distinctive odor is added to natural gas to assist in the detection of leaks, you should not rely on just your nose to alert you to the presence of natural gas. There are a number of reasons why your sense of smell may not always let you know that gas is leaking or has been released. For example, certain conditions in pipe and soil may cause ‘odor fade’ - the loss of odorant so that it is not detectable by smell. Some people may not be able to smell the odor because they have a diminished sense of smell, or are experiencing olfactory fatigue (normal, temporary inability to distinguish an odor after prolonged exposure to it). Some physical conditions including common colds, sinus conditions, allergies, eating certain foods, inattentiveness, and the use of tobacco, alcohol, drugs, and certain medications may also lessen the ability to smell the odor. In addition, the odor may be masked or hidden by other odors that are present, such as cooking or damp, musty, or chemical odors.


Prevent Line Damage and Leaks in Your Home

  • Never hang anything on gas piping.
  • Never tamper with natural gas equipment.
  • Always call 811 before landscaping or digging.

The customer is responsible

for maintaining all piping

from the meter to the natural

gas equipment.








Excess Flow Valve (EFV) Notification

April 2017

Full Details: EFV Installation


An EFV is a mechanical safety device installed in a natural gas service line between the natural gas main and the natural gas meter.

EFVs minimize or stop the flow of natural gas in the event of a service line break.

EFVs will not work properly on all natural gas services; therefore, not all customers qualify for an EFV.   


You may choose to have an EFV installed on your service line

Installation of an EFV is optional. Costs vary and are the responsibility of the customer. Residential costs are likely to exceed $500.  Commercial costs are likely to exceed $1000, but will vary depending on the complexity of the installation. A quote will be provided upon request.


Quick Facts:

  • Most residential customers with service lines installed after 2009 have an EFV included on their service line.
  • EFV's can not be installed on some service lines due to high gas flow, low pressure or other factors.
  • EFV's are not designed to close if a leak occurs beyond the gas meter on house-piping or appliances, or if the leak on the service line is small.

Full details on: EFV Installation

Click HERE for more information or call us at 803-323-5304 or 866-578-4427, option 3