For most San Diego households, the electric and gas bill arrives from San Diego Gas & Electric, a private company that holds a regional monopoly on delivering power and natural gas. Because customers cannot shop for a different wire to their house, the state regulates what the company may charge. The agency that does that work is the California Public Utilities Commission, and its decisions are the reason utility rates rise, fall and change shape. Understanding the basics makes it easier to read news about rate increases and to know where the public can weigh in.
What is the CPUC?
The commission is a state agency created by the California Constitution. It has five commissioners, appointed by the governor and confirmed by the state Senate, who serve staggered six-year terms. The governor designates one commissioner as president. The CPUC regulates investor-owned electric, natural gas, water and telecommunications companies and, in some areas, passenger carriers and railroad safety. It does not regulate municipal utilities, such as those run by cities, or most community choice programs, though it oversees related rules.
The commission is supported by a large professional staff and by administrative law judges, who preside over formal cases. Commissioners make final decisions in public voting meetings.
How are rates set?
The core idea is called cost-of-service regulation. A utility is allowed to recover its reasonable costs of operating and maintaining the system, plus a fair rate of return on the money it has invested in infrastructure. State law requires that rates be just and reasonable. The commission’s job is to decide what costs are reasonable and to set rates that collect the approved amount from customers.
The central proceeding is the general rate case. Utilities such as SDG&E file an application with the commission roughly every four years, laying out how much money they say they need for equipment, labor, maintenance, safety and wildfire mitigation. The case then takes a year or two. Parties file testimony, hold hearings and negotiate. An administrative law judge issues a proposed decision, any commissioner may propose an alternate, and the commission votes on the outcome at a public meeting. The result sets the utility’s revenue requirement for a multi-year period, and rates are adjusted accordingly.
Who represents customers?
Utilities are represented by their own lawyers and experts. Customers have several voices. The commission’s Public Advocates Office is an independent office inside the agency whose job is to represent customers’ interests and push for the lowest rates consistent with safe, reliable service. It participates in rate cases, files testimony and often recommends that the commission approve far less than the utility requests. Consumer groups, local governments, business associations and environmental organizations may also take part as formal parties.
Members of the public who are not parties can submit comments, speak at public participation hearings that the commission schedules in the utility’s service area, and send written comments to commissioners. These comments become part of the record, and they can influence how commissioners view a case, particularly when many people raise the same concern.
Why have rates been rising?
San Diego has some of the highest electricity rates in the country, and consumer advocates have documented large increases over the past decade. The reasons are debated. Utilities and regulators point to rising costs of wildfire prevention and mitigation, including covering power lines, clearing vegetation and shutting off power in high-fire conditions, along with investments in transmission and distribution, the shift to renewable energy and the cost of buying power in volatile markets. The Public Advocates Office has argued that excessive utility spending, especially on certain wildfire and grid projects, is a major factor and that the utility’s profit margins should be scrutinized.
These topics connect to broader themes in the region. Fire risk is why many of the costs exist, as discussed in wildfire preparedness in San Diego County. The growth of electric vehicles, described in how EV charging works, adds new demand and new rate options for drivers.
What discounts and programs exist?
California has programs to help customers with low incomes. The California Alternate Rates for Energy program, known as CARE, provides a discount on electricity and gas bills for eligible households, and the Family Electric Rate Assistance program serves moderate-income households. The discount levels and eligibility rules are set by the commission, so the current numbers should be checked on the utility’s website or the commission’s. Medical baseline allowances give extra lower-priced energy for customers with certain medical needs.
Rate design also matters. Utilities offer time-of-use plans, in which electricity costs more at peak hours, and the commission has approved changes such as fixed monthly charges paired with lower per-kilowatt-hour rates, a design intended to make bills fairer and encourage electrification but which has been controversial among consumer groups. Customers can often lower bills by shifting usage, installing efficient equipment or adding solar and storage, although the rules for compensating solar customers have changed in recent years. Internet service is regulated differently, and residents can check what is available at their address with the tool described in the National Broadband Map guide.
What do the bill’s line items mean?
A typical electric bill separates charges for generation, which is the cost of producing or buying the power, from charges for delivery, which pays for poles, wires and substations. Additional lines cover public purpose programs, such as energy efficiency and low-income assistance, and charges related to wildfire funds and past costs. In parts of San Diego County, a community choice program may supply the generation while SDG&E continues to deliver the power, in which case the bill shows both. Because each line has its own origin, a rate increase can come from a general rate case, from a legislative mandate or from changes in energy markets. Reading the bill’s breakdown, and the notices that accompany a proposed increase, shows which of those is at work.
How is the CPUC different from other bodies?
The commission regulates companies, not cities. Cities and counties can have their own role, such as franchise agreements, or in some cases creating community choice aggregators that buy power on behalf of residents. The state Legislature sets the policies that the commission implements, including renewable energy targets and wildfire rules, so a significant share of what shows up on a bill reflects choices made in Sacramento, a process described in how the Legislature makes law. Federal agencies regulate wholesale power markets and interstate transmission.
How can residents take part?
The commission’s website lists open proceedings, public hearings and voting meeting agendas. Anyone can submit comments on a proceeding, and many cases have a public comment page. Some residents join groups that participate formally. For a billing problem, such as an error, the first step is to contact the utility, and if it is not resolved, the commission’s consumer affairs office can take complaints.
The process is slow and technical, which can make it feel remote. But it is where decisions are made about what a regulated monopoly can charge, and the record created in rate cases is a rich public source of information about utility spending. Reading the Public Advocates Office’s summaries, the utility’s application and the commission’s decisions gives a clearer view than headlines alone.
Sources: California Public Utilities Commission; California Public Advocates Office; San Diego Gas and Electric; California Constitution
