EXHIBIT 99.1

Certification of Principal Executive Officer Pursuant to18
U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on
Form 10-Q of Duquesne Light Company for the period ending March 31, 2003, as filed with the Securities and Exchange Commission on the date hereof (the Report), Victor A. Roque, as President of Duquesne Light Company, hereby certifies,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

| | (1)                                                          | The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and                                                   
| | ------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                                                              |                                                                                                                                                                
| | (2)                                                          | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Duquesne Light Company.
| |                                                              |                                                                                                                                                                
| | WITNESS the due execution hereof this 15th day of May, 2003.

| | /s/ VICTOR A. ROQUE                                     | 
| | ------------------------------------------------------- | 
| |                                                         | 
| | Victor A. Roque President (Principal Executive Officer) | 

This certification accompanies this
Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by Duquesne Light Company for purposes of Section 18 of the Securities Exchange Act of
1934, as amended.

A signed original of this certification required by Section 906 has been provided to Duquesne Light Company,
who will retain it and furnish a copy to the Securities and Exchange Commission or its staff upon request.



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Certification of Principal Financial Officer Pursuant to18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of
2002

In connection with the Quarterly Report on Form 10-Q of Duquesne Light Company for the period ending March 31, 2003, as filed with
the Securities and Exchange Commission on the date hereof (the Report), Stevan R. Schott, as Vice President and Controller of Duquesne Light Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

| | (1)                                                          | The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and                                                   
| | ------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------
| |                                                              |                                                                                                                                                                
| | (2)                                                          | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Duquesne Light Company.
| |                                                              |                                                                                                                                                                
| | WITNESS the due execution hereof this 15th day of May, 2003.

| |  | /s/ STEVAN R. SCHOTT                                                         | 
| |  | ---------------------------------------------------------------------------- | 
| |  |                                                                              | 
| |  | Stevan R. Schott Vice President and Controller (Principal Financial Officer) | 

This certification accompanies this
Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by Duquesne Light Company for purposes of Section 18 of the Securities Exchange Act of
1934, as amended.

A signed original of this certification required by Section 906 has been provided to Duquesne Light Company, who
will retain it and furnish a copy to the Securities and Exchange Commission or its staff upon request.