Calgon Carbon And Mitsubishi Complete Joint Venture

PITTSBURGH, PA - September 11, 2002- Calgon Carbon Corporation (NYSE:CCC) announced today that Mitsubishi Chemical Corporation of Tokyo, Japan and Calgon Carbon have signed the final agreements to form a joint venture partnership that will produce and sell activated carbon and related services throughout Japan. The new alliance company, Calgon Mitsubishi Chemical Corporation, will begin operation in October 2002.

Mitsubishi Chemical will own 51 % of the joint venture, while Calgon Carbon will own 49%. As the minority owner, Calgon Carbon will report results under the equity method of accounting. While this will reduce total consolidated sales for Calgon Carbon by about $7 million annually, it will have a positive effect on its net income. On an earnings per share basis, it is expected that the joint venture will contribute about $0.04 to Calgon Carbon's EPS in 2003.

Mitsubishi is the largest producer of granular activated carbon (GAC) in Japan.
Calgon Carbon is the world's largest producer of GAC and operates a reactivation facility in Fukui Prefecture, Japan.

Commenting on the announcement, Jim Cederna, Calgon Carbon's chairman and chief executive officer, said, "The joint venture is consistent with Calgon Carbon's strategy to expand our business globally and to remain the world leader in activated carbon and services. Calgon Mitsubishi Chemical Corporation will be the largest provider of activated carbon solutions for air and water purification in Japan."

Assessing Purification, Separation, Recovery and Synthesis Needs
Calgon Carbon Corporation provides Engineered Solutions to customers' air, water and chemical process problems through design, fabrication and operation of systems that utilize a combination of core technologies: ion exchange and chromatographic separations, ultraviolet light disinfections and oxidation, odor control, solvent recovery, VOC abatement and distillation.

The group includes 160 professional engineers, scientists, sales and marketing personnel, four global manufacturing sites, intellectual property assets of more than 50 patents as well as pilot plant facilities and custom chemical manufacturing capabilities utilizing our technology.

About Calgon Carbon Corporation
Calgon Carbon Corporation is a global leader in services and solutions for making air and water safer and cleaner, and for purifying food, beverage, and industrial process streams.

Headquartered in Pittsburgh, Calgon Carbon Corporation employs approximately 1,000 people and serves more than 4,000 customers around the world through four business platforms: Carbon, Service, Engineered Solutions and Consumer Health.

Calgon Carbon offers a variety of technology solutions and services to address all purification, separation, recovery and synthesis needs.

For more information, visit the Calgon Carbon website at: www.calgoncarbon.com or contact a customer service technician at: info@calgoncarbon.com or call 1-800-422-7266.

Contact: Gail Gerono, Director of Investor Relations and Corporate Communications, (412) 787-6795; gerono@calgoncarbon.com