EXHIBIT 32(ii)

          CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED
            PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Annual Report of Ionics, Incorporated (the "Company") on
Form 10-K for the year ended December 31, 2003 as filed with the Securities and
Exchange Commission on the date hereof (the "Report"), the undersigned hereby
certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that:

         1.       The Report fully complies with the requirements of Section
                  13(a) or 15(d) of the Securities Exchange Act of 1934, as
                  amended; and

         2.       The information contained in the Report fairly presents, in
                  all material respects, the financial condition and results of
                  operations of the Company.

                                                /s/Daniel M. Kuzmak
                                                --------------------------
                                                Daniel M. Kuzmak
                                                Vice President and Chief
                                                Financial Officer

Date: March 15, 2004