Exhibit 23.1 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 9, 1999, appearing on page 18 of the Annual Report to Stockholders which is incorporated in this Annual Report on Form 10-K. PRICEWATERHOUSECOOPERS LLP 600 Grant Street Pittsburgh, PA 15219-2793 March 25, 1999 17