Exhibit 99.1 American States Water Company Announces Fourth Quarter and Full Year 2023 Results • 10% increase (or 0.05pershare)inrecordedfourthquarter2023consolidateddilutedEPScomparedtofourthquarterof2022•1.25 per share increase in reported consolidated diluted EPS for full year 2023 compared to 2022, or 0.41pershareincreaseasadjusted(discussedlater)◦Regulatedutilitiesspent175.7 million in company-funded capital expenditures in 2023, a historic high; and filed a new genera ...