(Check One):

    ¨  Form 10-K

    ¨  Form 20-F

    ¨  Form 11-K

    x  Form 10-Q

    ¨  Form 10-D

    ¨  Form N-SAR

    ¨  Form N-CSR




Washington, D.C. 20549


FORM 12b-25




OMB Number: 3235-0058

Expires: March 31, 2006

Estimated average burden hours per response . . . 2.50






For Period Ended: September 30, 2006



Transition Report on Form 10-K



Transition Report on Form 20-F



Transition Report on Form 11-K



Transition Report on Form 10-Q



Transition Report on Form N-SAR





For the Transition Period Ended:__________________________

Read Instruction (on back page) Before Preparing Form. Please Print or Type.

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:



Calgon Carbon Corporation

Full Name of Registrant



Former Name if Applicable


P.O. Box 717

Address of Principal Executive Office (Street and Number)


Pittsburgh, PA  15230-0717

City, State and Zip Code


PART II — RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25 (b), the following should be completed. (Check box if appropriate)


  (a)   The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;
  (b)   The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q, or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
  (c)   The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.




State below in reasonable detail the reasons why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.


The Company needs additional time to finalize its financial statements in order to ensure accurate reporting of its financial condition and results of operation for the three and nine months ended September 30, 2006. The reason for the delay is to provide additional time for the Company’s management and Audit Committee to complete their review of the error that was made in the calculation of the Company’s tax provision which will require restatement of the Company’s unaudited financial statements for the quarters ended March 31, and June 30, 2006, respectively.







Name and telephone number of person to contact in regard to this notification

Leroy M. Ball




(Area Code)

(Telephone Number)


Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s).   o   Yes   x  No




Form 8-K as filed on February 24, 2006 did not include the appropriate financial statements required to be filed with Form 8-K. Instead, the Company filed the required financial statements with its Form 10-K on March 30, 2006.




Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? x  Yes   o  No




If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.




It is anticipated that the results of operations for the three and nine month periods ended September 30, 2006 will differ from the corresponding periods for the last fiscal year. However, the impact cannot be estimated at the time of this Form 12b-25 filing due to the forthcoming restated quarterly reports for the quarters ended March 31, and June 30, 2006.


Calgon Carbon Corporation

(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

Date November   9, 2006







Leroy M. Ball - CFO

INSTRUCTION: The form may be signed by an executive officer of the registrant or by any other duly authorized representative. The name and title of the person signing the form shall be typed or printed beneath the signature. If the statement is signed on behalf of the registrant by an authorized representative (other than an executive officer), evidence of the representative’s authority to sign on behalf of the registrant shall be filed with the form.


Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).