Core Service

Receiving your natural gas service from a third-party Gas Service Provider (GSP) is serviced through the Core Aggregation Transportation Service.

Core Aggregation Transportation (CAT)

The CAT program gives customers the option to purchase natural gas from gas marketers, also known as aggregators. The following customers are eligible for the program.

  • Customers using 250,000 therms or less per year

  • Residential customers

  • Natural gas vehicle customers

Signing Up for Service

If you are interested in receiving Core Aggregation Transportation Service, first contact a Gas Service Provider (GSP) and discuss your options.

If you decide on this service, the GSP will submit a gas direct access service request (DASR) to SDG&E to switch your account to the Customer Choice Program.

Your GSP will need the following:

  • Billing account

  • Meter number

  • Service address

You can find this information at the top of your SDG&E bill.

Residential customers have 30 days after they receive their first bill from their supplier to cancel their enrollment in the CAT program.  Contact your service provider or SDG&E to request a termination of third party gas services.

Changing to a Different Gas Service Provider

Initially, customers commit to participate in the Customer Choice Program for one year. After the first year, customers can switch to a different GSP or return to SDG&E procurement services. The agreement with your GSP should outline any cancellation process and conditions.

If your GSP terminates service to customers or goes out of business, you will return to SDG&E’s procurement service.

90 Days Termination and Switch Conditions

Customers have up to 90 days from the termination effective date to switch to another GSP. After 90 days, if the customer has not chosen a new GSP, the customer must continue to receive gas procurement service from SDG&E for a total of 12 months before being eligible to return to service under the Customer Choice program.

  • Terms and Conditions

    These programs are approved by the California Public Utilities Commission (CPUC) and may be modified or terminated at any time. The CAT Program is subject to Tariff Rule No. 32 and other applicable tariffs and CPUC decisions that are in effect from time to time.