EXHIBIT 32.1


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


                     
The undersigned hereby certifies, in my capacity as an officer of
Boston Edison Company (Boston Edison), for purposes of 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-
Oxley Act of 2002, that to the best of my knowledge:

  (i)  the enclosed Quarterly Report of Boston Edison on Form 10-
       Q for the period ended June 30, 2003 fully complies with
       the requirements of Section 13(a) or 15(d) of the
       Securities Exchange Act of 1934; and

  (ii) the information contained in such Quarterly Report fairly
       presents, in all material respects, the financial
       condition and results of operation of Boston Edison.

Dated:  August 8, 2003     By:    /s/ THOMAS J. MAY
                                  Thomas J. May
                                  Chairman, President and
                                  Chief Executive Officer