##### 



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

In connection with the Quarterly Report of NRG Northeast Generating LLC (the
Company) on Form 10-Q for the quarter ended June 30, 2003, as filed with the
Securities and Exchange Commission on the date hereof (Form 10-Q), each of the
undersigned officers of the Company certifies, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
that, to such officers knowledge:



| | (1) |  | The Form 10-Q fully complies with the
requirements of Section 13(a) or 15(d) of the Securities
Exchange Act of 1934; and                                                                                              
| | --- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| | (2) |  | The information contained in the Form
10-Q fairly presents, in all material respects, the
financial condition and results of operations of the
Company as of the dates and for the periods expressed in
the Form 10-Q.

|                      |  |                                                                               
|--------------------- |  | ------------------------------------------------------------------------------
|Date: August 13, 2003 |  |                                                                               
|                      |  |                                                                               
|                      |  | /s/ Scott J. Davido                                                           
|                      |  |                                                                               
|                      |  | Scott J. Davido,
Vice President, General Counsel
(Principal Executive Officer)
|                      |  |                                                                               
|                      |  | /s/ George P. Schaefer                                                        
|                      |  |                                                                               
|                      |  | George P. Schaefer,
Treasurer
(Principal Financial Officer)                   
|                      |  |                                                                               
|                      |  | /s/ William T. Pieper                                                         
|                      |  |                                                                               
|                      |  | William T. Pieper,
Controller
(Principal Accounting Officer)                  

The foregoing certification is being furnished solely pursuant to 18 U.S.C.
Section 1350 and is not being filed as part of the Report or as a separate
disclosure document.

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to NRG Northeast Generating LLC and
will be retained by NRG Northeast Generating LLC and furnished to the
Securities and Exchange Commission or its staff upon request.