Press Release

Calgon Carbon Corporation's Ultraviolet Technologies Division and

PITTSBURGH, PA  –  12/01/2010

Calgon Carbon Corporation’s (NYSE: CCC) Ultraviolet Technologies (UVT) Division and its wholly owned subsidiary, Hyde Marine, Inc., announced today a milestone achievement in becoming certified by the ISO 9001:2008 Management System. The UVT Division received the ISO 9001:2008 accreditation from the registrar Det Norske Veritas (DNV) and the ANAB National Accreditation Board. The certification of compliance with ISO 9001:2008 recognizes that the policies, practices, and procedures of our UVT Division ensure consistent quality in the products and services we provide to our customers. The certification applies to the management system for the design, development, manufacture, delivery, installation, warranty support, and aftermarket parts and service for ultraviolet (UV) water treatment and ballast water treatment (BWT) systems. In commenting on the registration certificate, James A. Sullivan, Calgon Carbon’s vice president, Americas operations said, “The achievement of ISO:9001:2008 certification reflects Calgon Carbon’s continuous effort to achieve superior UV product quality and reliability for our customers. The certification demonstrates our commitment to quality and customer satisfaction in the design, manufacture, and distribution of UV water treatment and ballast water treatment systems.” Calgon Carbon’s UVT Division is known for its leading edge application of UV disinfection and UV oxidation technologies for drinking water, wastewater, groundwater, and water re-use. The company developed an economical process using UV to inactivate Cryptosporidium and similar pathogens in surface water, rendering them harmless to humans. The UVT Division also introduced one of the first advanced UV oxidation processes to remediate contaminated groundwater and it currently has over 300 UV oxidation installations worldwide. Hyde Marine, a recent addition to Calgon Carbon’s UV Technologies Division, is a global market leader in the growing Ballast Water Treatment market, having sold more than 70 Type Approved systems to date. The Hyde GUARDIAN® unit received International Maritime Organization (IMO) Type Approval in April 2009 and was the first BWT System accepted into the U.S. Coast Guard’s Shipboard Technology Evaluation Program (STEP) program. The Hyde GUARDIAN® system is chemical free, using filtration and ultraviolet disinfection to treat ships’ ballast water to prevent the spread of invasive species from port to port. 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 higher energy and raw material costs, costs of imports and related tariffs, labor relations, availability of capital and environmental requirements as they relate both to our operations and to our customers, 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. About Det Norske Veritas Det Norske Veritas (DNV) is an independent foundation with the purpose of safeguarding life, property, and the environment. Our history goes back to 1864, when the foundation was established in Norway to inspect and evaluate the technical condition of Norwegian merchant vessels. # # #