Press Release

Calgon Carbon Awarded $3-Million Contract for Prevention of Disinfection Byproducts

PITTSBURGH, PA  –  06/22/2010

Calgon Carbon Corporation (NYSE: CCC) announced today that it has been awarded a $3.0-million contract from the Cobb County-Marietta Water Authority, Marietta, Georgia to help the authority achieve compliance with the U.S. Environmental Protection Agency’s Stage 2 Disinfection Byproducts Rule (DBP Rule), which goes into effect April 2012.

Calgon Carbon will supply 28 Model 12-40 granular activated carbon pressure vessels, which will serve as “post-filter contactors” to remove disinfection byproducts precursors at the authority’s Hugh A. Wyckoff Water Treatment Plant and prevent the formation of disinfection byproducts (DBPs) in the region’s drinking water.

DBPs are potentially harmful compounds that are formed when chlorine, used to disinfect drinking water, reacts with naturally occurring organic materials in the water.

The upgrades at the Wyckoff Treatment Plant, which is designed to process a maximum of 72 million gallons of water per day, will allow the plant to achieve compliance with the Stage 2 DBP Rule, which was promulgated in 2006 and establishes maximum levels at which DBPs are permitted to be present in drinking water.

“We are pleased to partner with the Cobb County-Marietta Water Authority to support its progressive approach to supplying clean, safe drinking water,” said Robert P. O’Brien, executive vice president of Calgon Carbon. “We look forward to continuing to provide similar support to other communities in their efforts to comply with the Stage 2 Disinfection Byproducts Rule.”

For more information about Calgon Carbon’s leading activated carbon and ultraviolet technology solutions for municipalities and industries, visit dev.calgoncarbon.com.

Calgon Carbon Corporation, headquartered in Pittsburgh, Pennsylvania, is a global leader in services and solutions for making water and air safer and cleaner.

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