NOTICE OF GOLDEN STATE WATER COMPANY APPLICATION REQUESTING TO INCREASE RATES LOS OSOS SERVICE AREA A.26-07-001 What is Being Requested? Golden State Water Company (GSWC) filed Application 26-07-001 to request authorization to increase rates over a three-year period, covering the years 2028 through 2030. This request to increase rates would be effective beginning January 1, 2028. In this application, GSWC is requesting to consolidate its Santa Maria and Los Osos Customer Service Areas under a new Coastal Region consolidated rate structure for both its residential and non-residential customers. Why is GSWC Requesting This Rate Increase? GSWC is requesting an increase in total revenues for all three years as shown in the table below. It includes both the requested amount for the consolidated Coastal Region (if approved) and for the stand-alone Los Osos (if the consolidation is not approved). Total Increase Coastal Consolidated $11,991,415 36.8% Los Osos $3,320,515 48.1% The purpose of this request is for GSWC to cover its anticipated costs from 2028 through 2030 for Return on Rate Base, federal income tax, depreciation, property taxes, and allocated General Office district office expenses (such as customer service, water quality) and labor. How could this affect my monthly bill? Consolidated Rate Structure Bill Impact Under GSWC’s proposal to consolidate rates, metered rates in Los Osos would be frozen at their present level, excluding any applicable surcharges or credits. However, GSWC is proposing an increase to the general Schedule AA-4 (Private Fire Service) from $8.00 to $9.00 per inch of diameter of service connection. Stand-alone Bill Impact If the proposed application is approved by the CPUC but the consolidated rate structure is denied, the average residential customer with a 5/8 x 3/4” meter using 5 ccf (1 ccf = 748 gallons) per month would see a rate increase of approximately $31.85 per month. The actual impact will vary based on usage and other factors. Additional Information An administrative law judge will hold hearings, consider evidence, testimony, and public comments before drafting a proposed decision on this application. CPUC Commissioners will then vote on a final decision at a public meeting. You can read more about the utility’s request and make public comment by visiting apps.cpuc.ca.gov/c/a2607001. For questions about participating in CPUC matters, you can contact the Public Advisor’s Office at Public.Advisor@cpuc.ca.gov, 1-866-849-8390, or 505 Van Ness Ave., San Francisco, CA 94102. Please reference A.26-07-001 in any communication with the CPUC. Questions About the Request For questions about this application, please contact GSWC Regulatory Affairs Department at: GSWC_Reg_Affairs@gswater.com, 1-800-999-4033 or 630 E. Foothill Blvd., San Dimas, CA 91773. CNSB # 4059986