(Check One):
UNITED STATES
OMB APPROVAL
¨  Form 10-K
¨  Form 20-F
¨  Form 11-K
x  Form 10-Q
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
FORM 12b-25
OMB Number: 3235-0058
Expires: March 31, 2006
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¨  Form 10-D
    
¨  Form N-SAR
NOTIFICATION OF LATE FILING
SEC FILE NUMBER
¨  Form N-CSR
    
   
CUSIP NUMBER
 
 
For Period Ended: March 31, 2007
 
o
Transition Report on Form 10-K
 
o
Transition Report on Form 20-F
 
o
Transition Report on Form 11-K
 
o
Transition Report on Form 10-Q
 
o
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:
 
 
PART I — REGISTRANT INFORMATION
 
Calgon Carbon Corporation
Full Name of Registrant
 
N/A
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)
 
x   
 
(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.
 
 
 
 
 
 
PART III — NARRATIVE
 
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 operations for the three months ended March 31, 2007. The reason for the delay is to provide additional time for the Company’s management and Audit Committee to complete their review.
 
 
PART IV — OTHER INFORMATION
   
(1)
Name and telephone number of person to contact in regard to this notification

Leroy M. Ball
412
787-6700
(Name)
(Area Code)
(Telephone Number)

(2)
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).   x  Yes   o  No
 
 
(3)
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? o Yes   x  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.
 
 
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 May 9, 2007
 By    
 
 
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.
 
 
ATTENTION
  
 
 
  
 Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).