Safety and Environmental Commitment 
Drives Koppers to Work Responsibly

Annual report highlights progress in company's commitment to those it serves 

PITTSBURGH, PA (03/16/05) -- Koppers Inc. has issued "Working Responsibly," its annual review of the company's progress in corporate responsibility, including its safety, health and environmental (SH&E) programs. The report covers achievements and awards for the company's carbon materials and chemicals, coke, and wood treating facilities around the world.

Among this year's highlights are: ISO 14001 certification for environmental management systems at the company's major operating plants worldwide; 25 awards for safety excellence from the U.S. National Safety Council; statistics on the company's SH&E performance in 2004; and environmental compliance innovations at plants in Grenada, Mississippi and Kurnell, New South Wales, Australia.

"Maintaining a culture of SH&E excellence is a core value at Koppers. Through the company's environmental stewardship, Koppers demonstrates its commitment to employees, customers, neighbors and the environment," said Walter W. Turner, President and CEO of Koppers.

"This is the third year that Koppers has shared its accomplishments through a progress report. Publicly reporting our efforts is a way of being accountable to our stakeholders," said Randall D. Collins, Vice President, Regulatory Affairs.

"Working Responsibly" can be viewed at http://www.csrwire.com or http://www.koppers.com. Printed versions are available by writing to SH&E Department, Koppers Inc., 436 Seventh Ave., Pittsburgh, PA 15219 or by email to CollinsRD@koppers.com.

About Koppers

Koppers, with corporate headquarters and a research center in Pittsburgh, Pennsylvania, is a global integrated producer of carbon compounds and treated wood products. Including its joint ventures, Koppers operates 38 facilities in the United States, United Kingdom, Denmark, Australia, China, the Pacific Rim and South Africa. The Company is a wholly owned subsidiary of KI Holdings Inc. The stock of KI Holdings Inc. is shared by a large number of employee investors and by majority equity owner Saratoga Partners of New York, N.Y.