Exhibit

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO EXCHANGE ACT RULE 13a-14(a) OR 15d-14(a), AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES OXLEY ACT OF 2002

I, Joshua Ballard, certify that:


1.	I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of Energy Recovery, Inc. for the period ended December 31, 2019; and


2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.



Date: June 10, 2020	/s/ JOSHUA BALLARD
	Name:	Joshua Ballard
	Title:	Chief Financial Officer
		(Principal Financial Officer)