EXHIBIT 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Prospectuses constituting part of the Registration Statements on Forms S-8 (No. 33-34019 and No. 333-01019) of Calgon Carbon Corporation of our report dated February 3, 1998, appearing on page 21 of the Annual Report to Stockholders which is incorporated in this Annual Report on Form 10-K. PRICE WATERHOUSE LLP 600 Grant Street Pittsburgh, Pennsylvania 15219-2793 March 25, 1998 16