CHICAGO, IL--(Marketwired - Jan 30, 2014) - Trillium CNG™, a business unit of Integrys Energy Group, Inc. (NYSE: TEG), recently received the 2013 Clean Fuels Champion Award from the Chicago Area Clean Cities Coalition (CACC) for its commitment to improving Chicago's air quality.

Since 2001, the CACC has annually presented the Clean Fuels Champion Award to a company or individual that has demonstrated superior leadership in improving Chicago's air quality through alternative fuels sources; award recipients are selected by the coalition's executive board.

"We are very pleased to be named champion by the Chicago Area Clean Cities Coalition," said Charles Koontz, Vice President, Commercial Services for Trillium CNG. "Our goal is to provide a clean, safe and reliable compressed natural gas vehicle refueling infrastructure to help the Chicago area reach its goal of having clean fuel, clean air and being a clean city."

Trillium CNG is building a network of compressed natural gas fueling stations making natural gas fuel more accessible and convenient. By the end of 2014, Trillium CNG will be operating 90 CNG stations nationally, with 51 of them accessible to the public.

About Trillium CNG
 Trillium CNG is a leading provider of CNG to fleets, and also offers complete facility design, construction, operation and maintenance services. Our focus is on fueling heavy-duty fleets that require high-performance solutions. For more information, visit www.TrilliumCNG.com.

About Integrys Energy Group, Inc.
 Integrys Energy Group, Inc. is a diversified energy holding company with regulated natural gas and electric utility operations (serving customers in Illinois, Michigan, Minnesota and Wisconsin), an approximate 34 percent equity ownership interest in American Transmission Co. (a federally regulated electric transmission company), and nonregulated energy operations. For more information, visit www.integrysgroup.com.

About Chicago Area Clean Cities
Chicago Area Clean Cities (CACC) is a voluntary, locally-based coalition dedicated to encouraging the use of clean fuels and clean fuel vehicles in the Chicago metropolitan area. Part of the U.S. Department of Energy's Clean Cities Program, CACC supports public-private partnerships that deploy alternative fuel vehicles, such as those using biodiesel, compressed natural gas and propane, and build supporting infrastructure. By encouraging alternative fuel vehicle use, CACC helps enhance energy security and environmental quality at the local and national levels. For more information, visit www.chicagocleancities.org.