Exhibit 99.1

April 24, 2024

For immediate release

CALIFORNIA WATER SERVICE GROUP BOARD OF DIRECTORS

DECLARES 317TH CONSECUTIVE QUARTERLY DIVIDEND

AND 57TH CONSECUTIVE ANNUAL DIVIDEND INCREASE

SAN JOSE, Calif. – At its meeting on April 24, 2024, the California Water Service Group (NYSE: CWT) Board of Directors declared the company's 317th consecutive quarterly dividend in the amount of $0.28 per common share. It will be payable on May 17, 2024 to stockholders of record as of the close of business on May 6, 2024.

California Water Service Group is the parent company of regulated utilities California Water Service, Hawaii Water Service, New Mexico Water Service, and Washington Water Service, as well as Texas Water Service, a utility holding company. Together, these companies provide regulated and non-regulated water and wastewater service to more than 2.1 million people in California, Hawaii, New Mexico, Washington, and Texas. California Water Service Group’s common stock trades on the New York Stock Exchange under the symbol “CWT.” Additional information is available online at www.calwatergroup.com.

This news release contains forward-looking statements within the meaning established by the Private Securities Litigation Reform Act of 1995 (“PSLRA”). The forward-looking statements are intended to qualify under provisions of the federal securities laws for “safe harbor” treatment established by the PSLRA. Forward-looking statements in this news release are based on currently available information, expectations, estimates, assumptions and projections, and our management’s beliefs, assumptions, judgments and expectations about us, the water utility industry and general economic conditions. These statements are not statements of historical fact. When used in our documents, statements that are not historical in nature, including words like will, would, expects, intends, plans, believes, may, could, estimates, assumes, anticipates, projects, progress, predicts, hopes, targets, forecasts, should, seeks or variations of these words or similar expressions are intended to identify forward-looking statements. Examples of forward-looking statements in this news release include, but are not limited to, statements describing Cal Water’s expected financial performance, investments in infrastructure projects and PFAS treatment, GHG emissions reductions targets, and expectations regarding the business and financial impact of the 2021 GRC decision. Forward-looking statements are not guarantees of future performance. They are based on numerous assumptions that we believe are reasonable, but they are open to a wide range of uncertainties and business risks. Consequently, actual results may vary materially from what is contained in a forward-looking statement. Factors that may cause actual results to be different than those expected or anticipated include, but are not limited to: our ability to invest or apply the proceeds from the issuance of common stock in an accretive manner; governmental and regulatory commissions’ decisions, including decisions on proper disposition of property; consequences of eminent domain actions relating to our water systems; changes in regulatory commissions’ policies and procedures, such as the CPUC’s decision in 2020 to preclude companies from proposing fully decoupled WRAMs, which impacted the 2021 GRC Filing; the outcome and timeliness of regulatory commissions’ actions concerning rate relief and other matters; increased risk of inverse condemnation losses as a result of climate change and drought; our ability to renew leases to operate water systems owned by others on beneficial terms; changes in California State Water Resources Control Board water quality standards; changes in environmental compliance and water quality requirements; electric power interruptions, especially as a result of public safety power shutoff programs; housing and customer growth; the impact of opposition to rate increases; our ability to recover costs; availability of water supplies; issues with the implementation, maintenance or security of our information technology systems; civil disturbances or terrorist threats or acts; the adequacy of our efforts to mitigate physical and cyber security risks and threats; the ability of our enterprise risk management processes to identify or address risks adequately; labor relations matters as we negotiate with the unions; changes in customer water use patterns and the effects of conservation, including as a result of drought conditions; our ability to complete, in a timely manner or at all, successfully integrate and achieve anticipated benefits from announced acquisitions; the impact of weather, climate change, natural disasters, and actual or threatened public health emergencies, including disease outbreaks, on our operations, water quality, water availability, water sales and operating results and the adequacy of our emergency preparedness; restrictive covenants in or changes to the credit ratings on our current or future debt that could increase our financing costs or affect our ability to borrow, make payments on debt or pay dividends; risks associated with expanding our business and operations geographically; the impact of stagnating or worsening business and economic conditions, including inflationary pressures, general economic slowdown or a recession, increasing interest rates, instability of certain financial institutions, changes in monetary policy, adverse capital markets activity or macroeconomic conditions as a result of the geopolitical conflicts, and the prospect of a shutdown of the U.S. federal government; the impact of market conditions and volatility on unrealized gains or losses on our non-qualified benefit plan investments and our operating results; the impact of weather and timing of meter reads on our accrued unbilled revenue; the impact of evolving legal and regulatory requirements, including emerging environmental, social and governance requirements and our ability to comply with PFAS regulations; and other risks and unforeseen events described in our Securities and Exchange Commission (“SEC”) filings. In light of these risks, uncertainties and assumptions, investors are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date of this news release. When considering forward-looking statements, you should keep in mind the cautionary statements included in this paragraph, as well as the Annual 10-K, Quarterly 10-Q, and other reports filed from time-to-time with the SEC. We are not under any obligation, and we expressly disclaim any obligation to update or alter any forward-looking statements, whether as a result of new information, future events or otherwise.

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Contact

James P. Lynch

408-367-8200 (analysts)

Shannon Dean

408-367-8243 (media)