AMERICAN STATES WATER CO

(a) Evaluation of Disclosure Controls and Procedures

As required by Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Registrant has carried out an evaluation, under the supervision and with the participation of its management, including its Chief Executive Officer (“CEO”) and its Chief Financial Officer (“CFO”), of the effectiveness, as of the end of the fiscal quarter covered by this report, of the design and operation of Registrant’s “disclosure controls and procedures” as defined in Rule 13a-15(e) and 15d-15(e) promulgated by the SEC under the Exchange Act. Based upon that evaluation, the CEO and the CFO concluded that Registrant’s disclosure controls and procedures, as of the end of such fiscal quarter, were adequate and effective to ensure that information required to be disclosed by Registrant in the reports that Registrant files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to Registrant’s management, including its CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

(b) Changes in Internal Controls over Financial Reporting

There has been no change in Registrant’s internal control over financial reporting during the quarter ended September 30, 2025, that has materially affected or is reasonably likely to materially affect Registrant’s internal control over financial reporting.