Press Release

Calgon Carbon Acknowledges Starboard Letter and Financial Presentation

PITTSBURGH, PA  –  11/04/2013

Calgon Carbon Corporation (NYSE: CCC) said today in connection with the letter and financial presentation filed by Starboard Value LP that it always appreciates suggestions from shareholders and will be reviewing the recommendations.

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.

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 changes in, or delays in the implementation of, regulations that cause a market for our products, acquisitions, 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.

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Contact:

Gail A. Gerono

Vice President – Investor Relations and Communications

Direct Dial:  412-787-6795

ggerono@calgoncarbon-us.com