The PUC will begin a two-phase investigation into the retail electricity market in Pennsylvania starting with a hearing of industry officials and consumer advocates on June 8 in Harrisburg.

“After we get those comments in we’ll look into what if anything about the market we need to address,” said PUC spokesperson Denise McCracken.

McCracken said the investigation stems from the recent merger of FirstEnergy and Allegheny Energy, two large generation and distribution companies.

“We want to be sure that with the merger there’s still plenty of competition in the marketplace,” McCracken said.

Recently, the Commission responded to a Philadelphia Inquirer story about billing problems in the southeast. One retailer failed to display its rates; another mistakenly added a sales tax to the bill.

A letter from the Commission ordered the state's electric utilities and more than 100 licensed electricity suppliers to disclose any billing irregularities and "plan corrective measures."