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 Report on Form 10-Q for the period  ended June 30,
2006 of KeySpan  Corporation (the  "Corporation"),  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.



Date:    August 3, 2006


                                                  /s/Gerald Luterman
                                                  ------------------------
                                                  Gerald Luterman
                                                  Executive Vice President
                                                  and Chief Financial Officer