UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 17, 2010

SOUTHWEST GAS CORPORATION

(Exact name of registrant as specified in its charter)

California	1-7850	88-0085720
(State or other jurisdiction of	(Commission	(I.R.S. Employer
incorporation or organization)	File Number)	Identification No.)
5241 Spring Mountain Road
Post Office Box 98510
Las Vegas, Nevada		89193-8510
(Address of principal executive offices)		(Zip Code)

Registrant's telephone number, including area code: (702) 876-7237

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01                                Regulation FD Disclosure.

On May 17, 2010, Southwest Gas Corporation (the “Company”) released summary statistical information for each of the ten years in the period ended December 31, 2009.  A copy of this information is attached hereto as Exhibit 99.

This Form 8-K and the attached exhibit are provided under Item 7.01 of Form 8-K and are furnished to, but not filed with, the Securities and Exchange Commission.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	SOUTHWEST GAS CORPORATION
Date: May 17, 2010
	/s/ ROY R. CENTRELLA
	Roy R. Centrella
	Vice President/Controller and
	Chief Accounting Officer

EXHIBIT INDEX

Exhibit
No.	Description
99	Summary statistical information as of December 31, 2009 released on May 17, 2010.