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 calgoncarbon.dev.

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

This news release contains historical information and forward-looking statements. Forward-looking statements typically contain words such as “expect,” “believe,” “estimate,” “anticipate,” or similar words indicating that future outcomes are uncertain. Statements looking forward in time, including statements regarding future growth and profitability, price increases, cost savings, broader product lines, enhanced competitive posture and acquisitions, are included in the company’s most recent Annual Report pursuant to the “safe harbor” provision of the Private Securities Litigation Reform Act of 1995. They involve known and unknown risks and uncertainties that may cause the company’s actual results in future periods to be materially different from any future performance suggested herein. Further, the company operates in an industry sector where securities values may be volatile and may be influenced by economic and other factors beyond the company’s control. Some of the factors that could affect future performance of the company are higher energy and raw material costs, costs of imports and related tariffs, labor relations, capital and environmental requirements, changes in foreign currency exchange rates, borrowing restrictions, validity of patents and other intellectual property, and pension costs. In the context of the forward-looking information provided in this news release, please refer to the discussions of risk factors and other information detailed in, as well as the other information contained in the company’s most recent Annual Report.