For safe and reliable natural gas service, choose Southwest Gas Corporation. Since 1931, we have been an energy supplier of liquefied petroleum gas (LPG) throughout the Southwest, and were among the first pioneers to introduce natural gas service to Arizona and Nevada. Today, we serve more than one million customers in three states, keeping to our mission of excellence and safety, while offering modern convenience and accessibility.Starting your service with Southwest Gas Corporation allows you to enjoy:-An Southwest Gas Is Here To Support Our Customers In A Variety Of Ways. Myaccount for paperless billing and auto-payment plans-Starting, stopping or relocating your gas service with a click of a button-Regular inspections, maintenance and improvements-24/7 hotline for all natural gas emergency calls-Useful information and resources to help you save money and the environmentNatural Gas is one of the cleanest fuels on the market today, producing only carbon dioxide and water vapor when it burns.