PECO joins the Exelon family of utilities in recognizing National Call Before You Dig Day and is a member of the Common Ground Alliance to share best practices to promote safe excavation and decrease instances of damage to underground lines. The company also provides customers and local contractors with important information about safety around overhead and underground utility lines through mailings, customer newsletters, social media and advertising.To learn more, visit peco.com/safety. PECO, founded in 1881, is Pennsylvania's largest electric and natural gas utility. Headquartered in Philadelphia, PECO delivers energy to more than 1.6 million electric customers and more than 516,000 natural gas customers in southeastern, Pennsylvania. The company's 2,500 employees are dedicated to the safe and reliable delivery of electricity and natural gas as well as enhanced energy management conservation, environmental stewardship and community assistance. PECO was named 2017 Best Mid-size Employer in Philadelphia by Forbes Magazine. The company also has an estimated annual economic impact of $4.3 billion in Pennsylvania, supporting more than 8,700 local jobs and producing $732 million in labor income. PECO is a subsidiary of Exelon Corporation (NYSE: EXC), the nation's only Fortune 100 utility and leading competitive energy provider. For more information visit PECO.com , and connect with the company on Facebook and Twitter . If you are a member of the media and would like to receive PECO news releases via email, please send your email address to PECO.Communication@exeloncorp.com . PHOTO OPPORTUNITY: PECO will display "TODAY IS NATIONAL 811 DAY - KNOW WHAT'S BELOW & CALL 811 BEFORE YOU DIG!" on its Crown Lights message system, atop the company's headquarters at 2301 Market Street in Philadelphia, Friday morning and evening.