Elements of Natural Gas | Atmos Energy
Atmos Energy employee with noise canceling headphones turning a natural gas valve on a large pipeline.

Elements of Natural Gas

Flammability 

Natural gas has very limited range of flammability -- in concentrations in air below 4 percent and above about 14 percent natural gas will not burn. It also has a very high ignition temperature, about 1,200 degrees F. The high ignition temperature and the limited flammability range make accidental ignition or combustion unlikely.

Odor and the Sense of Smell

Natural gas has no scent or color of its own, so government agencies require utility companies to add an odor. Atmos Energy and many other utilities mix in a harmless gas called “mercaptan,” which has the smell of rotten eggs. We follow precise steps to ensure proper levels of mercaptan are in the natural gas we deliver, so a person with a normal sense of smell will notice a leak if one happens.

To learn how to recognize a natural gas leak using all of your senses, click here

In addition, residential methane detectors are available and can provide an additional ability to detect the presence of gas. These alarms must be selected and installed according to the manufacturer's instructions. Learn more at the Gas Technology Institute.

“Flaring” is a standard industry practice in which trained crews oversee a controlled burn of natural gas.