California Advice Letters
The California Advice Letters are used to document tariff changes filed with and approved by the California Public Utilities Commission (CPUC)
Download the Entire California Gas Tariff
Renewable Natural Gas
In December 2019, the CPUC implemented an Incentive Reservation System for the Biomethane Injection Monetary Incentive Program (BIMIP) established in Decision 15-06-029. The BIMIP provides up to $3 million for non-dairy clusters and $5 million for dairy clusters that successfully interconnect with the natural gas pipeline system and operate by December 31, 2026. The Incentive Reservation System allows project developers to reserve incentive funds during the development phase of a project and receive the funds once the project is interconnected and operating. Applications for the Incentive Reservation System are designed to ensure that only viable projects can secure a spot on the reservation list.
Find more information on the Southwest Gas Biomethane Gas interconnection criteria and guidelines here:
For additional information, please contact
KeyAccountManagement@swgas.com
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.
California Emergency Disaster Relief Program
The California Emergency Disaster Relief Program (EDRP) are customer protections mandated by the California Public Utilities Commission that are designed to help our California customers during a declared emergency.
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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
Commission Websites
Check your state’s Commission office for more information on utility regulation and consumer programs and services.
