| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| TONDREAU PAMELA L. | Director | C/O ENERGY RECOVERY, INC., 1717 DOOLITTLE DRIVE, SAN LEANDRO | /s/ William Yeung, Attorney-in-fact for Pamela Tondreau | 16 May 2025 | 0001722237 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ERII | Common Stock | Purchase | $51,570 | +4,200 | +11% | $12.28 | 41,043 | 14 May 2025 | Direct |
Exhibit 24