Exhibit 32.2

                              CERTIFICATION OF THE
              EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
                             PURSUANT TO SECTION 906
                        OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Annual Report of KeySpan  Corporation (the "Corporation")
for the year ended  December 31, 2003 as filed with the  Securities and Exchange
Commission on the date hereof (the "Report"), I, Gerald Luterman, Executive Vice
President and Chief Financial Officer of the Corporation,  certify,  pursuant to
18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

     (1)  The Report fully  complies with the  requirements  of Section 13(a) or
          15(d) of the Securities Exchange Act of 1934, as amended; and

     (2)  The  information  contained  in the  Report  fairly  presents,  in all
          material respects,  the financial  condition and results of operations
          of the Company.


                                            /s/Gerald Luterman
                                            ------------------------------
                                            Name: Gerald Luterman
                                            Title: Executive Vice President and
                                                   Chief Financial Officer
                                            Date: March 11, 2004