What is PECO?
Based in Philadelphia, PECO is Pennsylvania’s largest electric and natural gas utility. A subsidiary of Exelon Corp., PECO delivers power to more than 1.6 million electric customers and more than 511,000 natural gas customers in southeastern Pennsylvania, including the cities of Philadelphia, Chester, Coatesville, Lancaster and York. PECO got its start in 1881 as the Brush Electric Light Company of Philadelphia and incorporated as the Philadelphia Electric Company in 1902.