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  Quarterly   Report  of  KeySpan   Corporation   (the
"Corporation")  for the  quarter  ended  September  30,  2004 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: November 4, 2004