Pepco customers are more dissatisfied about the company’s performance than customers of other major utilities following the derecho on June 29, which knocked out power for more than one million people, WTOP reports.

The WTOP Beltway Poll, which was conducted by Heart+Mind Strategies, comes one week after The Washington Post published its own poll reflecting that a majority of District residents think Pepco did an unsatisfactory job restoring power after the storm.

In its first self-assessment, Pepco defended itself saying it responded aggressively and effectively to restore power to the nearly half a million Pepco customers who were left without power.

“Even with all of the destruction, we beat our original global estimated time of restoration by two days. We restored power to 90% of customers by midnight, July 4 and our performance was in line with the response of other utilities to the storm,” the utility said on its Web site.