------------ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 --------------- FORM 8-K Current Report PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 14, 2002 IONICS, INCORPORATED (Exact name of registrant as specified in its charter) Commission File Number: 1-7211 Massachusetts (State of incorporation) 04-2068530 (I.R.S. Employer Identification Number) 65 Grove Street, Watertown, Massachusetts 02472 (Address of principal executive offices and Zip Code) Registrant's telephone number, including area code: (617) 926-2500 Page 1 of 3 pages Item 9. Regulation FD Disclosure On August 14, 2002, Ionics, Incorporated (the "Company") submitted to the Securities and Exchange Commission the certifications by its Chief Executive Officer and Chief Financial Officer, pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, relating to the Company's quarterly report on Form 10-Q for the quarter ended June 30, 2002, filed on August 14, 2002. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Dated: August 14, 2002 IONICS, INCORPORATED By: /s/Stephen Korn --------------------------- Stephen Korn Vice President and General Counsel