Exhibit 99.1

The Board of Directors

Xylem Inc.

301 Water Street SE

Washington, D.C. 20003

The Board of Directors:

We hereby consent to the inclusion of our opinion letter, dated January 22, 2023, to the Board of Directors of Xylem Inc. (“Xylem”) as Annex D to, and reference thereto under the headings “SUMMARY — Opinions of Xylem’s Financial Advisors” and “THE MERGER — Opinions of Xylem’s Financial Advisors” in, the joint proxy statement/prospectus relating to the proposed merger involving Xylem and Evoqua Water Technologies Corp. (“Evoqua”), which joint proxy statement/prospectus forms a part of the Registration Statement on Form S-4 of Evoqua (the “Registration Statement”). By giving such consent, we do not thereby admit that we are experts with respect to any part of such Registration Statement within the meaning of the term “expert” as used in, or that we come within the category of persons whose consent is required under, the Securities Act of 1933, as amended, or the rules and regulations of the Securities and Exchange Commission promulgated thereunder.

Very truly yours,
LAZARD FRERES & CO. LLC
By:	/s/ Mark T. McMaster
	Mark T. McMaster
	Global Head of Mergers & Acquisitions

March 8, 2023