Pepco will not appeal the $1 million fine it faces for failing to provide Maryland residents with reliable electric service, the company announced.

The Maryland Public Service Commission issued the fine because Pepco failed to maintain its distribution system — in particular, by neglecting to cut back tree growth on a regular basis — and as a result forced customers to endure lengthy, frequen outages both during storms and on clear days, the utility regulator announced Wednesday. Those outages were also worsened by Pepco’s customer service.