Decoupling and Delivery Charge Adjustment Provision (DCA)
The DCA specifies the accounting procedures and rate setting adjustments necessary to assure the Utility neither over-recovers, nor under-recovers, the margin-per-customer amounts authorized in its most recent general rate case proceeding.
Graham County Utilities Acquisition
On April 23, 2021, Graham County Utilities, Inc. (GCU) and Southwest Gas Corporation (SWG) filed a joint application with the Arizona Corporation Commission for approval to transfer assets of GCU to SWG and to extend SWG’s Certificate of Convenience and Necessity. Below is the public notice and hearing information. (DOCKET NOS. G-01551A-21-0092 and G-02527A-21-0092)
Arizona Energy Efficiency and Renewable Energy Resource Technology Portfolio Implementation Plan (Docket No. G-01551A-21-0186)
On June 1, 2021, Southwest Gas filed an application with the Arizona Corporation Commission requesting approval of an Energy Efficiency and Renewable Energy Resource Technology Portfolio Implementation Plan for Program Years 2022-2023, which was designed in accordance with the Gas Utility Energy Efficiency Standards set forth in Sections R14-2-2501 through R14-2-2520 of the Arizona Administrative Code.
2021 Arizona Base Rate Adjustment Request
On December 3, 2021, Southwest Gas Corporation (“SWG”) filed an application with the Arizona Corporation Commission (“ACC”) for a permanent gross revenue increase of $90.7 million or 11.5 percent over current revenues. To learn more, check out
Invested in Arizona
Request Other Rates and Tariff Information
Use the link below to request Rates and Tariff information not available on this website. Should you have any questions regarding your bill, please contact Customer Assistance at 877-860-6020.
Download the Entire Arizona Gas Tariff
Arizona Gas Tariff No. 7
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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.
