Exhibit 31.1
CERTIFICATION
I, Joseph M. Rigby, certify that:
| 1. | I have reviewed this report on Form 10-K/A of Pepco Holdings, Inc.; and |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
| Date: March 5, 2012 | /s/ JOSEPH M. RIGBY | |
| Joseph M. Rigby | ||
| Chairman of the Board, President and Chief Executive Officer |
