Exhibit No. 15



May 8, 1998


 
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549

Dear Ladies and Gentlemen:

We are aware that Calgon Carbon Corporation has included our report dated May 8,
1998 (issued pursuant to the provisions of Statement on Auditing Standards No.
71) in the Prospectuses constituting part of its Registration Statements on
Forms S-8 (No. 33-34019 and No. 333-01019).  We are also aware of our
responsibilities under the Securities Act of 1933.

Yours very truly,



Price Waterhouse LLP