Press Releases

LAS VEGAS, Aug. 31 /PRNewswire-FirstCall/ -- Southwest Gas Corporation (NYSE: SWX) has filed a request with the Arizona Corporation Commission (Commission) to increase its authorized operating revenues by $50.2 million or 4.9 percent. The request is due primarily to an increase in the company's fixed operating costs. Southwest has also proposed a rate structure that would encourage energy-efficiency efforts, as well as remove weather-related volatility from customer bills.

If approved by the Commission, an average residential bill of $50.78 for 28 therms would increase by $3.86 to $54.64. Southwest has asked the Commission that rates be implemented October 1, 2008. It has been nearly three years since the company filed its last general rate case.

Southwest Gas serves more than 958,000 customers in Arizona.

This press release may contain statements which constitute "forward- looking statements" within the meaning of the Securities Litigation Reform Act of 1995 (Reform Act). All such forward-looking statements are intended to be subject to the safe harbor protection provided by the Reform Act. A number of important factors could cause actual results to differ materially from those stated in the forward-looking statements. These factors include, but are not limited to, the impact of weather variations on customer usage, customer growth rates, the effects of regulation, the timing and amount of rate relief, and changes in rate design.

SOURCE  Southwest Gas Corporation
    -0-                             08/31/2007
    /CONTACT:  Media Contact, Cynthia Messina, +1-702-876-7132, or Shareholder
Contact, Ken Kenny, +1-702-876-7237, both of Southwest Gas Corporation/
    /Web site:  http://www.swgas.com /
    (SWX)

CO:  Southwest Gas Corporation; Arizona Corporation Commission
ST:  Nevada, Arizona
IN:  OIL UTI
SU:

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6155 08/31/2007 13:00 EDT http://www.prnewswire.com