Company Affiliates

Notice of New Affiliate/Update to CA ATR Compliance Plan

Name Business Activity
Carson Water Company (Carson Water)  Holding company for Centuri Construction Group, Inc.
Centuri Group, Inc. (formerly Isleworth Holding Co.) Holding Company1
IntelliChoice Energy, LLC (IntelliChoice) Joint venture. Majority-owned subsidiary of NPL. Formed to market and commercialize natural gas-fired heat pump technology.
IntelliChoice Energy of California LLC (CAL ICE)
Wholly-owned subsidiary of IntelliChoice, formed to market/commercialize natural gas-fired pump heat technology in California.1
NPL Construction Co. (NPL) Full service pipeline distribution system contractor.1
Paiute Pipeline Company (Paiute)  FERC jurisdictional interstate natural gas pipeline. Paiute's system extends from the Idaho-Nevada border to the Nevada-California border.
Southwest Administrators, Inc. (SA) Wholly owned subsidiary of NPL. Formed to provide pipeline construction service in California.1
The Southwest Companies (SC)  Holding company for temporary possession of certain real estate subsidiaries. Currently inactive.
Southwest Gas Transmission Co. (SGTC) FERC jurisdictional interstate natural gas pipeline transporting gas to Southwest Gas' Southern Nevada system. SGTC does not provide service in California. 
Southwest Gas Holdings, Inc. Holding Company
Southwest Gas Utility Group, Inc. Holding Company
Utility Financial Corp. (UFCO) Minority limited partner in SGTC.

1Transactions between Southwest Gas and these affiliates are subject to the California Affiliate Transaction Rules.
 
 

Learn How Gas Rates Are Set

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The rates used by Southwest Gas are set by state regulatory commissions using a process called the "rate case cycle." Because of individual state regulations, the rate case cycle differs slightly for each state. See how rates are set for your state.
 

Request Rates & Tariff Information

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Use this form to request historical Rates and Tariff information not available on this website.  This form may also be used as a request to be placed on Southwest Gas' California Advice Letter Service List.  If you have any questions regarding your bill, please contact Customer Assistance at    
877-860-6020.
 

Commission Websites

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Check your state's Commission Office for more information about rates and regulations.