|Exhibit 32.2                                                                                                                                                                                                                                                                                                                                                                                                                              
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|CERTIFICATION PURSUANT TO RULE 13a-14(b) OR                                                                                                                                                                                                                                                                                                                                                                                               
|RULE 15d-14(b) and 18 U.S.C. SECTION 1350,                                                                                                                                                                                                                                                                                                                                                                                                
|AS ADOPTED PURSUANT TO                                                                                                                                                                                                                                                                                                                                                                                                                    
|SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002                                                                                                                                                                                                                                                                                                                                                                                             
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|In connection with the quarterly report of Capacitive Deionization Technology Systems, Inc. (the "Company") on Form 10-QSB for the quarter ended March 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Phil Marshall, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
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|(1)       The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and                                                                                                                                                                                                                                                                                                           
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|(2)       The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.                                                                                                                                                                                                                                                                            
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|Date: May 12, 2006 | /s/  Phil Marshall     
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|                   | Chief Financial Officer