UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number:     811-07664          

          BlackRock California Investment Quality Municipal Trust, Inc.          
(Exact name of registrant as specified in charter)

100 Bellevue Parkway, Wilmington, DE 
19809 
(Address of principal executive offices) 
(Zip code) 


Robert S. Kapito, President
BlackRock California Investment Quality Municipal Trust, Inc.

40 East 52nd Street, New York, NY 10022
(Name and address of agent for service)

 

Registrant's telephone number, including area code:     888-825-2257          

Date of fiscal year end:     October 31, 2006     
Date of reporting period:
     July 31, 2006     


Item 1. Schedule of Investments.

The Registrant’s unaudited schedule of investments as of the close of the reporting period pursuant to Rule 30b1-5 under the Investment Company Act of 1940 is as follows:

PORTFOLIO OF INVESTMENTS (unaudited)
JULY 31, 2006

BlackRock California Investment Quality Municipal Trust (RAA)

 
Principal
 
 
 
 
Amount
 
Option Call
 
Rating1
(000)
Description
Provisions2
Value
 

        LONG-TERM INVESTMENTS—140.4%        
          California—125.7%        
          California GO,        
  A+   $ 700      4.75%, 3/01/34   03/16 @ 100   $ 696,773  
  A+   40       5.75%, 3/01/19   03/07 @ 100   40,257  
  AAA   625   California St. Univ. RB, Ser. C, 5.00%, 11/01/38, MBIA   11/15 @ 100   644,088  
  A+   595   Chula Vista Indl. Dev. RB, 5.00%, 12/01/27   12/15 @ 102   601,634  
          Edl. Facs. Auth. RB,        
  AAA   760 3 Santa Clara Univ. Proj., 5.00%, 9/01/06, MBIA   N/A   775,968  
  AAA   75   Student Loan Prog., Ser. A, 6.00%, 3/01/16, MBIA   03/07 @ 102   77,128  
          Golden St. Tobacco Sec. Corp. RB,        
  AAA   1,015      5.00%, 6/01/45, AMBAC   06/15 @ 100   1,035,259  
  AAA   600 3    Ser. B, 5.50%, 6/01/13   N/A   657,780  
  AAA   400 3    Ser. B, 5.625%, 6/01/13   N/A   441,492  
  A3   1,040   Hlth. Facs. Fin. Auth. RB, Cedars Sinai Med. Ctr. Proj., 5.00%, 11/15/34   11/15 @ 100   1,051,471  
  AAA   1,000 3 Infrastructure & Econ. Dev. RB, Bay Area Toll Brdgs., Ser. A, 5.00%, 1/01/28, AMBAC   N/A   1,084,080  
  AAA   1,000   Los Angeles Cnty. ST, Cmnty. Facs., Ser. A, 5.50%, 9/01/14, FSA   09/07 @ 102   1,039,450  
  AAA   500   Los Angeles Dept. of Wtr. & Pwr., Pwr. Sys. RB, 5.00%, 7/01/35, FSA   07/15 @ 100   517,055  
  AA   1,150   Los Angeles Harbor Dept. RB, Ser. B, 6.00%, 8/01/13   08/06 @ 101   1,161,500  
  B   945   Los Angeles Regl. Arpt. Impvt., Corp. Lease RB, American Airlines, Inc. Proj.,        
             Ser. B, 7.50%, 12/01/24   12/12 @ 102   1,047,211  
  AAA   200   Murrieta Valley Univ. Sch. Dist. Pub. Fin. Auth. ST, Ser. A, 4.75%, 9/01/36   09/16 @ 100   197,218  
  AAA   700   Palm Springs Univ. Sch. Dist. GO, Election 2004, Ser. A, 4.50%, 8/01/35, FSA   08/14 @ 102   681,198  
  NR   1,000   Poway Unified Sch. Dist. ST, Cmnty. Facs. Dist. No. 6 Proj., 5.60%, 9/01/33   09/10 @ 102   1,014,210  
  A   1,000   Pub. Wks. Brd. Lease RB, St. Univ. Proj., Ser. A, 6.10%, 10/01/06   08/06 @ 101   1,003,800  
  NR   1,000   San Bernardino Cnty. ST, Cmnty. Facs., 5.90%, 9/01/33   09/12 @ 102   1,051,230  
  AAA   500   San Diego Ind. Dev. RB, Ser. A, 5.90%, 6/01/18, AMBAC   08/06 @ 100   500,450  
  AAA   40   So. California Pub. Pwr. Auth. RB, Transm. Proj., 5.50%, 7/01/20, MBIA   08/06 @ 100   40,032  
  AAA   500 3 Temecula Valley Unified Sch. Dist. GO, Ser. G, 5.75%, 8/01/07, FGIC   N/A   520,310  
  AAA   900 3 Tobacco Sec. Auth. of So. California, Tobacco Settlement RB, Ser. A, 5.625%, 6/01/12   N/A   983,610  
  AAA   750   Tustin Univ. Sch. Dist. ST, Cmnty. Facs. Dist. 97-1-A, 5.00%, 9/01/32, FSA   09/12 @ 100   765,322  
  AAA   370   West Basin Mun. Wtr. Dist. COP, Ser. A, 5.50%, 8/01/22, AMBAC   08/07 @ 101   379,535  

                  18,008,061  

          Puerto Rico—14.7%        
  AAA   85   Hwy. & Trans. Auth. RB, Ser. L, 5.25%, 7/01/38, AMBAC   No Opt. Call   94,962  
  BBB-   700   Indl. Tourist Edl. RB, Ana G. Mendez Univ. Sys. Proj., 5.00%, 3/01/26   03/16 @ 100   700,497  
  Aaa   745 3 Pub. Fin. Corp. RB, Ser. E, 5.50%, 2/01/12   N/A   806,120  
  BBB   500   Pub. Impvt. GO, Ser. A, 5.00%, 7/01/34   07/14 @ 100   502,575  

                  2,104,154  

          Total Long-Term Investments (cost $19,249,342)       20,112,215  

          SHORT-TERM INVESTMENTS—8.4%        
          Puerto Rico—4.9%        
  A-1+   700 4 Gov't. Dev. Bank RB, 3.53%, 8/02/06, MBIA, FRWD   N/A   700,000  


BlackRock California Investment Quality Municipal Trust (RAA) (continued)

               
 
 
Shares
Option Call
 
Rating1
(000)
Description
Provisions2
Value
 

        Money Market Fund—3.5%      
  NR  
500
  AIM Tax Free Investment Co. Cash Reserve Portfolio  
N/A
$ 500,000  

          Total Short-Term Investments (cost $1,200,000)     1,200,000  

          Total Investments—148.8% (cost $20,449,3425)     $21,312,215  
          Other assets in excess of liabilities—3.6%     521,669  
          Preferred shares at redemption value, including dividends payable —(52.4)%     (7,502,877 )

          Net Assets—100%     $14,331,007  



 
1   Using the highest of Standard & Poor’s, Moody’s Investment Services or Fitch’s ratings.  
2   Date (month/year) and price of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates.  
3   This bond is prerefunded. U.S. government securities, held in escrow, are used to pay interest on this security, as well as retire the bond in full at the date  
    indicated, typically at a premium to par.  
4   For purposes of amortized cost valuation, the maturity date of this instrument is considered to be the earlier of the next date on which the security can be redeemed at par, or the next date on which the rate of interest is adjusted. Rate shown is rate as of July 31, 2006.  
5   Cost for Federal income tax purposes is $20,444,842. The net unrealized appreciation on a tax basis is $867,373, consisting of $905,274 gross unrealized  
    appreciation and $37,901 gross unrealized depreciation.  


KEY TO ABBREVIATIONS
AMBAC     American Municipal Bond Assurance Corp.   GO     General Obligation  
COP     Certificate of Participation   MBIA     Municipal Bond Insurance Assoc.  
FGIC     Financial Guaranty Insurance Co.   RB     Revenue Bond  
FRWD     Floating Rate Weekly Demand   ST     Special Tax  
FSA     Financial Security Assurance              

 

See Notes to Financial Statements.

2


Item 2. Controls and Procedures.

(a) The Registrant's principal executive and principal financial officers have evaluated the Registrant's disclosure controls and procedures within 90 days of this filing and have concluded, as of that date, that the Registrant’s disclosure controls and procedures were reasonably designed to ensure that information required to be disclosed by the Registrant in this Form N-Q was recorded, processed, summarized, and reported within the required time periods and that information to be disclosed by the Registrant in this Form N-Q was accumulated and communicated to the Registrant’s management, including its principal executive and principal financial officers, as appropriate, to allow timely decisions regarding required disclosure.

(b) There were no changes in the Registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a -3(d)) that occurred during the Registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting.

Item 3. Exhibits.

Separate certifications of the Registrant’s Principal Executive and Financial Officers pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 are attached as EX-99.CERT.


SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)     BlackRock California Investment Quality Municipal Trust, Inc.               

By:     /s/ Henry Gabbay                                                  
Name: Henry Gabbay
Title: Treasurer and Principal Financial Officer
Date: September 27, 2006

     Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

By:     /s/ Robert S. Kapito                                             
Name: Robert S. Kapito
Title: President and Principal Executive Officer
Date: September 27, 2006

By:     /s/ Henry Gabbay                                                  
Name: Henry Gabbay
Title: Treasurer and Principal Financial Officer
Date: September 27, 2006