Consolidated Edison (ED) 10-Q 2004 Q2 Quarterly report

Exhibit 32.3.1

Certification Required Under Section 906 of the Sarbanes-Oxley Act of 2002

I, John D. McMahon, the Chief Executive Officer of Orange and Rockland Utilities, Inc. (the “Company”) certify that the Company’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2004, which this statement accompanies, (the “Form 10-Q”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)) and that the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    JOHN D. MCMAHON        

John D. McMahon

Dated: August 3, 2004