California Advice Letters
The California Advice Letters are used to document tariff changes filed with and approved by the California Public Utilities Commission (CPUC).
California Climate Credit
The CA Climate Credit is part of California’s efforts to fight climate change by limiting the amount of greenhouse gases that our largest pollution sources emit into the atmosphere.
A.19-04-022 – Application of Southwest Gas Corporation for Authority to Implement the Customer Data Modernization Initiative
On April 26, 2019, Southwest Gas filed with the Commission A.19-04-022 requesting approval to increase rates to fund the Customer Data Modernization Initiative (CDMI). The CDMI consists of replacing Southwest Gas’ decades old Customer Service System (CSS) and Gas Transaction System (GTS), two critical customer related data systems. Replacement of these systems is necessary for the Company to keep pace with market demands, improve flexibility, enhance cyber-security measures, and meet the Company’s evolving business needs.
A.19-02-002 – Application of Southwest Gas Corporation for Authority to Revise the California Gas Tariff
On February 1, 2019, Southwest Gas filed with the Commission an application (Application 19-02-002) to: 1) codify in the Tariff Preliminary Statement 17 the temporary changes to the Gas Cost Incentive Mechanism (GCIM) the temporary changes that were approved by the Commission’s Energy Division in October 2016; 2) further modify the GCIM to incorporate a Biomethane Gas Program; and 3) modify Tariff Rule No. 21 – Transportation of Customer-Secured Natural Gas to implement daily balancing requirements and institute operational flow orders (OFO) under certain conditions.
Mobilehome Park Utility Upgrade Program
Mobilehome park or manufactured housing community owners in Southwest Gas Corporation’s service territories may be eligible to participate in the Mobilehome Park Utility Upgrade Program (Program). Click the link below to learn more about the program.
Natural Gas Leakage Abatement Annual Report
In accordance with Senate Bill 1371 (Leno, 2014) and CPUC Rulemaking 15-01-008, Southwest Gas Corporation, along with other natural gas utilities in California, is required to submit an annual report on its prior year methane emissions. The 2017 Annual Report may be found at the following link:
Dairy Biomethane Pilot Project
In December 2017, the CPUC issued Decision 17-12-004, which established the necessary framework to direct natural gas Utilities to implement not less than five dairy biomethane Pilot Projects to demonstrate interconnection to the common carrier pipeline system and allow for rate recovery of reasonable infrastructure costs pursuant to Senate Bill (SB) 1383. Participating Utilities are SoCalGas, PG&E, SDG&E and Southwest Gas. On, March 7, 2018, the interagency Selection Committee, consisting of the CPUC, the California Air Resources Board, and the California Department of Food and Agriculture issued the Dairy Biomethane Pilot Project Solicitation (Solicitation) and Cost Estimation Tool to facilitate the selection of the Pilot Projects. The Solicitation, Cost Estimation Tool and the RNG Supplier Interconnection Project Fact Sheet are provided at the links below.
California Master-Meter Bill Calculation Tools
Rates were updated January 1, 2016, based on a California Public Utilities Commission Order. For a current bill calculation tool, please send a request using the following link: Request for more information >
Request Other Rates and Tariff Information
Use the link below 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. Should you have any questions regarding your bill, please contact Customer Assistance at 877-860-6020.
Download the Entire California Gas Tariff
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Other Regulatory Information
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Learn How Gas Rates Are Set
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
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
Check your state's Commission Office for more information about rates and regulations.
