X0407 4 2023-07-10 0 0001421517 Energy Recovery, Inc. ERII 0001531414 Sabol Colin R 1717 DOOLITTLE DRIVE SAN LEANDRO CA 94577 1 0 0 0 0 Common Stock 2023-07-10 4 A 0 3232 28.22 A 3232 D The annual Board of Directors restricted stock unit award was pro-rated based upon date of appointment and will fully vest on the 2024 Annual Meeting date, anticipated to be on or about June 6, 2024. Each restricted stock unit represents the right to receive, at settlement, one (1) share of the Company's common stock. Exhibit 24 /s/ William Yeung, Attorney-in-Fact for Colin R. Sabol 2023-07-12