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 March 31,
2007 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 Corporation.



Date: April 27, 2007


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