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A General Rate Case is the major regulatory proceeding for California utilities, which provides the CPUC an opportunity to perform an comprehensive examination of a utility's operations and costs.

Typically performed every three years, the GRC allows the CPUC to conduct a broad and detailed review of a utility's revenues, expenses, and investments in plant and equipment to establish an approved revenue requirement.


*** Pending General Rate Case (GRC) ***



Why does Golden State Water Company (GSWC) need a rate increase?

    Like many other water utilities facing new challenges to protect water supplies and delivery systems, GSWC is requesting a rate adjustment to meet the increasing costs of:

    • Purchased Services (i.e. purchased water, purchased power, and pump taxes)
    • Water Quality Standards
    • Maintenance of Water System Pipes
    • Refurbishment or Replacement of pipes to improve water delivery
    • Enhanced security-measures
    • Depreciation
    • General Office Allocated Costs
    • Labor
    • Payroll Taxes
    • Insurance

    How much will my water rates increase?

    GSWC's request to adjust rates is currently being reviewed by the California Public Utilities Commission (CPUC). GSWC will not have the detailed rate adjustment amounts, if any, until the CPUC makes their decision.  When the Commission acts upon the decision, it may adopt all or part of it as written, amend or modify it, or set it aside and prepare its own decision.  The Commission's final decision may be quite different from GSWC's request

    Will there be public participation meetings scheduled?

    When the CPUC schedules the public participation hearings, GSWC will mail individual customer notices to inform the customers of the location, date and time. 

    If I can't attend the public participation hearings, where can I send my comments?

    Comments regarding GSWC's rate adjustment request may be sent to the Commission's Public Advisors Office at:


           California Public Utilities Commission
    320 West 4th Street, Suite 500
    Los Angeles, CA 90013
    Attn: Public Advisor Office
    Phone: 1-866-849-8391


     California Public Utilities Commission
    505 Van Ness Avenue
    San Francisco, CA 94102



How Water Rates are Set 
(from the California Water Association (CWA) website at

Cost of Service/Rate of Return
Pricing for Commission-regulated water utilities is cost-based. Accordingly, consumers are charged the cost of acquiring and delivering water. Most goods and services in the United States are priced according to value (in other words, the price is established by what the consumer is willing and able to pay) as determined by the forces of supply and demand. Since water utilities are monopolies with exclusive service areas (no direct competition), the Commission regulates their activities to ensure adequate levels of service are provided at the lowest reasonable costs.

Water utilities incur expenses and capital costs in providing water service. Expenses are costs that have short-term benefits. In general rate cases, these costs are estimated on an annual basis. Capital expenditures provide long-term value. Therefore, cost recovery is spread over the years the benefits will occur. For example, the cost of a reservoir is recovered in rates over its expected useful life. Capital expenditures are financed by stockholder equity and long-term debt. Stockholders are provided a return on the funds they invest. Returns are forecasted in general rate cases based on market conditions (inflation and interest rates) and returns in comparable risk investments.

General Rate Increase - Large Water
Rates are primarily determined in general rate cases, which are formal applications filed with the Commission in three or more year intervals. Included in the utility's application are detailed cost estimates, expenses, capital expenditures, and water sales on a forward-looking basis. The Commission staff (accountants, economists, engineers, and lawyers) reviews this information over a period of several months and issues a report with recommendations.

In a general rate case, the Commission takes a broad, in-depth look at a utility's revenues, expenses, and financial outlook and considers quality of service and other factors to arrive at just and reasonable rates. Additionally, the Commission conducts public participation hearings, at which customers are encouraged to express their views concerning the utility's service and rate request, and evidentiary hearings, during which expert witnesses testify and are cross-examined. An Administrative Law Judge (ALJ) presides over all Commission hearings. After the hearings, the ALJ prepares a proposed decision for comment. Finally, the Commission weighs all the evidence and issues a decision. To the extent that the Commission finds expenses, capital expenditures, and other rate items are necessary and reasonable, a rate increase is authorized. The entire process takes approximately 10 months.

General Rate Increase - Small Water
General rate cases are time-consuming and expensive. To lighten the burden for small water companies and minimize rate case expenses recovered in rates, the Commission allows rates for small water companies to increase periodically using an inflation factor (Consumer Price Index or CPI) in lieu of a general rate case. Informal general rate cases by advice letter are also available for small water companies. While this process does not involve hearings or a formal Commission decision, the Commission staff does perform a through investigation and presents its recommendations to the Commission. Rates are approved by a Commission resolution. Typically, advice letter general rate increases take six to nine months.

Advice Letters, Including Offset Increases
Advice letters are sequentially numbered formal letters required by the Commission to change a utility's tariffs, including rates, rules, and conditions of service. They can also be used for notification, such as triggering a catastrophic event memorandum account (discussed below). Typical advice letters include changes in service area maps, rate changes adopted in Commission decisions, rule changes, and implementation of new services not previously offered.

Offset rate increases are for changes in costs not established during a general rate proceeding. Advice letter offsets may be requested for costs that are beyond the utility's control (purchased water, pump taxes, electric power, and water quality related items) and for specific items, such as capital improvements, where the timing and/or cost can not be determined with sufficient certainty during a general rate case. An advice letter offset can be filed after the timing and costs are known with certainty, and for capital improvements after the project has been placed in service. No hearings are held, but the Commission staff examines the utility's request and supporting workpapers, and, if appropriate, recommends that the Commission authorize the rate change.

The filing requirements for advice letters are contained in the Commission's General Order No. 96-A.

Balancing/Memorandum Accounts
The Commission's ratemaking procedures do not allow a utility to charge retroactively (after the fact) for expenses previously incurred. While over- and under-recovery of costs occur for a variety of reasons, such as unexpected changes in expense or sales levels, these are considered a normal business risk. However, for items that are outside the utility's control, the Commission in limited circumstances permits a tracking mechanism. These tracking mechanisms are called balancing and memorandum accounts (there is a technical accounting difference between the two, but they operate essentially the same). Once a balancing/memorandum account has been authorized, unexpected cost changes that are not reflected in rates may be recorded for future recovery.

Commonly used balancing accounts include water supply related costs (purchased water, pump taxes, and electric power). In the water supply balancing accounts, utilities may record any differences from the expense levels reflected in rates. If an offset increase has been granted since the general rate case for a specific balancing account, both the revenue and expense changes are recorded in the account.

Another example is costs related to catastrophic events, such as earthquakes and major storms. Obviously, estimating costs related to catastrophic events in general rate cases is not practicable. Therefore, the Commission allows water utilities to open Catastrophic Event Memorandum Accounts by filing an advice letter after a catastrophic event occurs. By timely filing this advice letter, utilities are permitted to track all catastrophic event costs for subsequent recovery, after a review of their reasonableness.

In sum, balancing accounts and memorandum accounts allow water rates to more accurately reflect costs.



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This page last updated on December 20, 2012
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