EX-24 6 poa.txt EXHIBIT 24.1 POWER OF ATTORNEY The undersigned Officers and Directors of Ionics, Incorporated hereby severally constitute Arthur L. Goldstein, Stephen Korn and each of them to sign for and in their names in the capacities indicated below, the Registration Statement on Form S-8 dated September 18, 2003, herewith filed with the Securities and Exchange Commission, and any and all amendments thereto, for the purpose of registering shares of Common Stock, par value $1.00 per share, of Ionics, Incorporated, hereby ratifying and confirming our signatures as they may be signed by our said attorneys to said Registration Statement and any and all amendments to said Registration Statement. Witness our hands and common seal on the dates set forth below.
Signature Title Date --------- ----- ---- Chairman of the Board /s/ Arthur L. Goldstein and Director September 18, 2003 ---------------------------------------- Arthur L. Goldstein /s/ Douglas R. Brown Director September 18, 2003 ---------------------------------------- Douglas R. Brown /s/ Stephen L. Brown Director September 18, 2003 ---------------------------------------- Stephen L. Brown Director ---------------------------------------- Kathleen F. Feldstein /s/ William K. Reilly Director September 18, 2003 ---------------------------------------- William K. Reilly /s/ John J. Shields Director September 18, 2003 ---------------------------------------- John J. Shields /s/ Daniel I. C. Wang Director September 18, 2003 ---------------------------------------- Daniel I. C. Wang /s/ Mark S. Wrighton Director September 18, 2003 ---------------------------------------- Mark S. Wrighton /s/ Allen S. Wyett Director September 18, 2003 ---------------------------------------- Allen S. Wyett