nq2.htm



 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY
 
Investment Company Act file number 811-6623
 
Nuveen California Select Tax-Free Income Portfolio
(Exact name of registrant as specified in charter)
 
Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)
 

Kevin J. McCarthy
Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)
 
Registrant's telephone number, including area code:         312-917-7700        
 
Date of fiscal year end:            3/31          
 
Date of reporting period:         6/30/11         
 
Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.
 
A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

 
 
 
 
Item 1. Schedule of Investments
 

           
   
Portfolio of Investments (Unaudited)
      
   
Nuveen California Select Tax-Free Income Portfolio (NXC)
      
   
June 30, 2011
      
Principal
    
Optional Call
    
Amount (000)
  
Description (1)
Provisions (2)
Ratings (3)
Value
   
Consumer Staples – 4.3%
      
$                  150
  
California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Bonds, Sonoma
6/15 at 100.00
BBB
$           140,565
   
County Tobacco Securitization Corporation, Series 2005, 4.250%, 6/01/21
      
1,015
  
California County Tobacco Securitization Agency, Tobacco Settlement Asset-Backed Revenue
6/12 at 100.00
BBB
1,015,650
   
Bonds, Fresno County Tobacco Funding Corporation, Series 2002, 5.625%, 6/01/23
      
4,045
  
Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed
6/22 at 100.00
Baa3
2,602,958
   
Bonds, Series 2007A-2, 0.000%, 6/01/37
      
5,210
  
Total Consumer Staples
    
3,759,173
   
Education and Civic Organizations – 9.4%
      
3,000
  
California Educational Facilities Authority, Revenue Bonds, Santa Clara University, Series 2008A,
4/18 at 100.00
Aa3
3,141,960
   
5.625%, 4/01/37
      
45
  
California Educational Facilities Authority, Revenue Bonds, University of Redlands, Series 2005A,
10/15 at 100.00
A3
40,046
   
5.000%, 10/01/35
      
1,000
  
California Educational Facilities Authority, Revenue Bonds, University of San Diego, Series 2002A,
10/12 at 100.00
A2
1,009,730
   
5.500%, 10/01/32
      
   
California Educational Facilities Authority, Revenue Bonds, University of the Pacific, Series 2006:
      
35
  
5.000%, 11/01/21
11/15 at 100.00
A2
36,482
45
  
5.000%, 11/01/25
11/15 at 100.00
A2
45,707
3,000
  
California Infrastructure Economic Development Bank, Revenue Bonds, J. David Gladstone
10/11 at 101.00
A–
3,044,580
   
Institutes, Series 2001, 5.500%, 10/01/19
      
1,000
  
Long Beach Bond Financing Authority, California, Lease Revenue Refunding Bonds, Long Beach
11/11 at 101.00
BBB
928,260
   
Aquarium of the South Pacific, Series 2001, 5.250%, 11/01/30 – AMBAC Insured
      
8,125
  
Total Education and Civic Organizations
    
8,246,765
   
Health Care – 12.0%
      
110
  
California Health Facilities Financing Authority, Revenue Bonds, Kaiser Permanante System,
4/16 at 100.00
A+
102,035
   
Series 2006, 5.000%, 4/01/37
      
2,550
  
California Health Facilities Financing Authority, Revenue Bonds, Sutter Health, Series 2007A,
11/16 at 100.00
AA–
2,438,693
   
5.250%, 11/15/46 (UB)
      
1,500
  
California Statewide Community Development Authority, Hospital Revenue Bonds, Monterey
6/13 at 100.00
AA+
1,591,440
   
Peninsula Hospital, Series 2003B, 5.250%, 6/01/18 – AGM Insured
      
1,500
  
California Statewide Community Development Authority, Insured Mortgage Hospital Revenue Bonds,
11/11 at 100.00
A–
1,500,750
   
Mission Community Hospital, Series 2001, 5.375%, 11/01/26
      
545
  
California Statewide Community Development Authority, Revenue Bonds, Kaiser Permanente System,
8/16 at 100.00
A+
544,302
   
Series 2001C, 5.250%, 8/01/31
      
1,880
  
California Statewide Community Development Authority, Revenue Bonds, Los Angeles Orthopaedic
12/11 at 100.00
BBB+
1,882,632
   
Hospital Foundation, Series 2000, 5.500%, 6/01/17 – AMBAC Insured
      
540
  
Loma Linda, California, Hospital Revenue Bonds, Loma Linda University Medical Center, Series
12/17 at 100.00
BBB
588,616
   
2008A, 8.250%, 12/01/38
      
1,100
  
Palomar Pomerado Health Care District, California, Certificates of Participation, Series 2010,
11/20 at 100.00
Baa3
995,280
   
6.000%, 11/01/41
      
800
  
Upland, California, Certificates of Participation, San Antonio Community Hospital, Series
1/21 at 100.00
A
816,464
   
2011, 6.500%, 1/01/41
      
10,525
  
Total Health Care
    
10,460,212
   
Housing/Multifamily – 1.3%
      
380
  
California Municipal Finance Authority, Mobile Home Park Revenue Bonds, Caritas Projects
8/20 at 100.00
BBB–
357,884
   
Series 2010A, 6.400%, 8/15/45
      
750
  
California Statewide Community Development Authority, Student Housing Revenue Bonds, EAH –
8/12 at 100.00
Baa1
751,680
   
Irvine East Campus Apartments, LLC Project, Series 2002A, 5.500%, 8/01/22 – ACA Insured
      
1,130
  
Total Housing/Multifamily
    
1,109,564
   
Housing/Single Family – 0.1%
      
75
  
California Housing Finance Agency, Home Mortgage Revenue Bonds, Series 2006H, 5.750%,
2/16 at 100.00
Baa1
75,983
   
8/01/30 – FGIC Insured (Alternative Minimum Tax)
      
   
Industrials – 1.2%
      
1,015
  
California Pollution Control Financing Authority, Solid Waste Disposal Revenue Bonds, Republic
No Opt. Call
BBB
1,086,172
   
Services Inc., Series 2002C, 5.250%, 6/01/23 (Mandatory put 12/01/17) (Alternative Minimum Tax)
      
   
Long-Term Care – 2.8%
      
1,500
  
ABAG Finance Authority for Non-Profit Corporations, California, Insured Senior Living Revenue
11/12 at 100.00
A–
1,508,820
   
Bonds, Odd Fellows Home of California, Series 2003A, 5.200%, 11/15/22
      
1,000
  
California Statewide Communities Development Authority, Revenue Bonds, Inland Regional Center
12/17 at 100.00
Baa1
941,200
   
Project, Series 2007, 5.250%, 12/01/27
      
2,500
  
Total Long-Term Care
    
2,450,020
   
Tax Obligation/General – 28.5%
      
750
  
California State, General Obligation Bonds, Series 2004, 5.000%, 2/01/23
2/14 at 100.00
A1
779,183
1,650
  
California State, General Obligation Bonds, Various Purpose Series 2009, 5.500%, 11/01/39
11/19 at 100.00
A1
1,692,554
6,225
  
Escondido Union High School District, San Diego County, California, General Obligation
No Opt. Call
AA+
1,203,293
   
Refunding Bonds, Series 2009, 0.000%, 8/01/36 – AGM Insured
      
1,000
  
Fremont Unified School District, Alameda County, California, General Obligation Bonds, Series
8/12 at 101.00
Aa2
1,047,360
   
2002A, 5.000%, 8/01/21 – FGIC Insured
      
   
Golden West Schools Financing Authority, California, General Obligation Revenue Refunding
      
   
Bonds, School District Program, Series 1999A:
      
4,650
  
0.000%, 8/01/16 – NPFG Insured
No Opt. Call
AAA
3,728,648
1,750
  
0.000%, 2/01/17 – NPFG Insured
No Opt. Call
AAA
1,334,988
2,375
  
0.000%, 8/01/17 – NPFG Insured
No Opt. Call
AAA
1,758,973
2,345
  
0.000%, 2/01/18 – NPFG Insured
No Opt. Call
AAA
1,672,712
   
Mountain View-Los Altos Union High School District, Santa Clara County, California, General
      
   
Obligation Capital Appreciation Bonds, Series 1997C:
      
1,015
  
0.000%, 5/01/17 – NPFG Insured
No Opt. Call
Aa1
816,395
1,080
  
0.000%, 5/01/18 – NPFG Insured
No Opt. Call
Aa1
815,432
100
  
Roseville Joint Union High School District, Placer County, California, General Obligation
8/15 at 100.00
AA–
102,124
   
Bonds, Series 2006B, 5.000%, 8/01/27 – FGIC Insured
      
3,220
  
Sacramento City Unified School District, Sacramento County, California, General Obligation
7/15 at 100.00
Aa3
3,287,233
   
Bonds, Series 2005, 5.000%, 7/01/27 – NPFG Insured
      
8,075
  
San Bernardino Community College District, California, General Obligation Bonds, Election of
No Opt. Call
Aa2
834,228
   
2008 Series 2009B, 0.000%, 8/01/44
      
1,500
  
San Diego Unified School District, San Diego County, California, General Obligation Bonds,
7/13 at 101.00
AA+
1,645,065
   
Series 2003E, 5.250%, 7/01/24 – AGM Insured
      
2,565
  
Sunnyvale School District, Santa Clara County, California, General Obligation Bonds, Series
9/15 at 100.00
AA+
2,661,957
   
2005A, 5.000%, 9/01/26 – AGM Insured
      
4,250
  
West Hills Community College District, California, General Obligation Bonds, School Facilities
8/31 at 100.00
AA+
1,548,913
   
Improvement District 3, 2008 Election Series 2011, 0.000%, 8/01/38 – AGM Insured
      
42,550
  
Total Tax Obligation/General
    
24,929,058
   
Tax Obligation/Limited – 19.6%
      
1,000
  
Bell Community Redevelopment Agency, California, Tax Allocation Bonds, Bell Project Area,
10/13 at 100.00
N/R
775,730
   
Series 2003, 5.625%, 10/01/33 – RAAI Insured
      
3,500
  
California State Public Works Board, Lease Revenue Bonds, Department of Corrections,
No Opt. Call
A2
3,898,297
   
Calipatria State Prison, Series 1991A, 6.500%, 9/01/17 – NPFG Insured
      
1,000
  
California State Public Works Board, Lease Revenue Bonds, Department of Mental Health,
6/14 at 100.00
A2
1,017,180
   
Coalinga State Hospital, Series 2004A, 5.500%, 6/01/23
      
1,500
  
California State Public Works Board, Lease Revenue Bonds, Various Capital Projects, Series
11/19 at 100.00
A2
1,582,575
   
2009I-1, 6.375%, 11/01/34
      
120
  
Capistrano Unified School District, Orange County, California, Special Tax Bonds, Community
9/15 at 100.00
BBB
115,618
   
Facilities District, Series 2005, 5.000%, 9/01/24 – FGIC Insured
      
360
  
Chino Redevelopment Agency, California, Merged Chino Redevelopment Project Area Tax Allocation
9/16 at 101.00
A–
295,639
   
Bonds, Series 2006, 5.000%, 9/01/38 – AMBAC Insured
      
1,000
  
Fontana Public Financing Authority, California, Tax Allocation Revenue Bonds, North Fontana
10/15 at 100.00
A
866,120
   
Redevelopment Project, Series 2005A, 5.000%, 10/01/32 – AMBAC Insured
      
   
Irvine, California, Unified School District, Community Facilities District Special Tax Bonds,
      
   
Series 2006A:
      
55
  
5.000%, 9/01/26
9/16 at 100.00
N/R
51,280
130
  
5.125%, 9/01/36
9/16 at 100.00
N/R
113,489
215
  
Los Angeles Community Redevelopment Agency, California, Lease Revenue Bonds, Manchester
9/15 at 100.00
A1
183,883
   
Social Services Project, Series 2005, 5.000%, 9/01/37 – AMBAC Insured
      
135
  
National City Community Development Commission, San Diego County, California, Redevelopment
8/21 at 100.00
A–
137,994
   
Project Tax Allocation Bonds, Series 2011, 6.500%, 8/01/24
      
50
  
Novato Redevelopment Agency, California, Tax Allocation Bonds, Hamilton Field Redevelopment
9/21 at 100.00
A–
51,175
   
Project, Series 2011, 6.750%, 9/01/40
      
1,300
  
Orange County, California, Special Tax Bonds, Community Facilities District 03-1 of Ladera
8/12 at 101.00
N/R
1,237,015
   
Ranch, Series 2004A, 5.625%, 8/15/34
      
105
  
Rialto Redevelopment Agency, California, Tax Allocation Bonds, Merged Project Area, Series
9/15 at 100.00
A–
87,313
   
2005A, 5.000%, 9/01/35 – SYNCORA GTY Insured
      
30
  
Riverside County, California, Redevelopment Agency Jurupa Valley Project Area 2011 Tax Allocation
10/21 at 100.00
A–
30,490
   
Bonds Series B, 6.500%, 10/01/25
      
130
  
Roseville, California, Certificates of Participation, Public Facilities, Series 2003A, 5.000%,
8/13 at 100.00
AA–
130,109
   
8/01/25 – AMBAC Insured
      
605
  
Sacramento City Financing Authority, California, Lease Revenue Refunding Bonds, Series 1993A,
No Opt. Call
A1
641,548
   
5.400%, 11/01/20 – NPFG Insured
      
25
  
San Francisco Redevelopment Finance Authority, California, Tax Allocation Revenue Bonds,
2/21 at 100.00
A–
25,815
   
Mission Bay North Redevelopment Project, Series 2011C, 6.750%, 8/01/41
      
   
San Francisco Redevelopment Financing Authority, California, Tax Allocation Revenue Bonds,
      
   
Mission Bay South Redevelopment Project, Series 2011D:
      
25
  
7.000%, 8/01/33
2/21 at 100.00
BBB
25,844
30
  
7.000%, 8/01/41
2/21 at 100.00
BBB
30,905
3,000
  
San Mateo County Transit District, California, Sales Tax Revenue Bonds, Series 2005A, 5.000%,
6/15 at 100.00
AA
3,299,399
   
6/01/21 – NPFG Insured
      
225
  
San Mateo Union High School District, San Mateo County, California, Certificates of
12/17 at 100.00
AA–
213,329
   
Participation, Phase 1, Series 2007A, 5.000%, 12/15/30 – AMBAC Insured
      
1,000
  
Santa Clara County Board of Education, California, Certificates of Participation, Series 2002,
4/12 at 101.00
Baa1
925,700
   
5.000%, 4/01/25 – NPFG Insured
      
40
  
Signal Hill Redevelopment Agency, California, Project 1 Tax Allocation Bonds, Series 2011,
4/21 at 100.00
N/R
39,698
   
7.000%, 10/01/26
      
1,000
  
Travis Unified School District, Solano County, California, Certificates of Participation,
9/16 at 100.00
N/R
861,790
   
Series 2006, 5.000%, 9/01/26 – FGIC Insured
      
360
  
Turlock Public Financing Authority, California, Tax Allocation Revenue Bonds, Series 2011,
3/21 at 100.00
BBB+
372,262
   
7.500%, 9/01/39
      
70
  
Yorba Linda Redevelopment Agency, Orange County, California, Tax Allocation Revenue Bonds,
9/21 at 100.00
A–
71,005
   
Yorba Linda Redevelopment Project, Subordinate Lien Series 2011A, 6.500%, 9/01/32
      
17,010
  
Total Tax Obligation/Limited
    
17,081,202
   
Transportation – 5.0%
      
1,150
  
Foothill/Eastern Transportation Corridor Agency, California, Toll Road Revenue Bonds, Series
1/12 at 100.00
BBB–
919,057
   
1995A, 5.000%, 1/01/35
      
3,000
  
Los Angeles Harbors Department, California, Revenue Refunding Bonds, Series 2001B, 5.500%,
8/11 at 100.00
AA
3,009,720
   
8/01/17 – AMBAC Insured (Alternative Minimum Tax)
      
445
  
San Francisco Airports Commission, California, Revenue Bonds, San Francisco International
9/11 at 100.00
A+
422,323
   
Airport, Second Series 1999, Issue 23A, 5.000%, 5/01/30 – FGIC Insured (Alternative
      
   
Minimum Tax)
      
4,595
  
Total Transportation
    
4,351,100
   
U.S. Guaranteed – 7.0% (4)
      
2,000
  
California Infrastructure Economic Development Bank, Revenue Bonds, Kaiser Hospital Assistance
8/11 at 100.00
A+ (4)
2,009,240
   
LLC, Series 2001A, 5.550%, 8/01/31 (Pre-refunded 8/01/11)
      
800
  
California State, General Obligation Bonds, Series 2004, 5.125%, 2/01/27 (Pre-refunded 2/01/14)
2/14 at 100.00
AAA
892,968
2,000
  
North Orange County Community College District, California, General Obligation Bonds, Series
8/12 at 101.00
AA (4)
2,116,600
   
2002A, 5.000%, 8/01/22 (Pre-refunded 8/01/12) – NPFG Insured
      
1,000
  
Port of Oakland, California, Revenue Bonds, Series 2002M, 5.250%, 11/01/20 (Pre-refunded
11/12 at 100.00
A (4)
1,065,840
   
11/01/12) – FGIC Insured
      
5,800
  
Total U.S. Guaranteed
    
6,084,648
   
Utilities – 6.7%
      
1,000
  
Imperial Irrigation District, California, Electric System Revenue Bonds, Refunding Series
11/20 at 100.00
AA–
1,029,720
   
2011A, 5.500%, 11/01/41
      
645
  
Long Beach Bond Finance Authority, California, Natural Gas Purchase Revenue Bonds, Series
No Opt. Call
A
607,377
   
2007A, 5.500%, 11/15/37
      
200
  
Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Series
7/13 at 100.00
AA–
211,490
   
2003A-2, 5.000%, 7/01/21 – NPFG Insured
      
7,600
  
Merced Irrigation District, California, Certificates of Participation, Water and Hydroelectric
9/16 at 64.56
A
3,565,843
   
Series 2008B, 0.000%, 9/01/23
      
215
  
Merced Irrigation District, California, Electric System Revenue Bonds, Series 2005, 5.125%,
9/15 at 100.00
N/R
188,136
   
9/01/31 – SYNCORA GTY Insured
      
275
  
Turlock Irrigation District, California, Revenue Refunding Bonds, Series 1992A, 6.250%,
No Opt. Call
A1
280,335
   
1/01/12 – NPFG Insured
      
9,935
  
Total Utilities
    
5,882,901
   
Water and Sewer – 2.5%
      
150
  
Healdsburg Public Financing Authority, California, Wastewater Revenue Bonds, Series 2006,
4/16 at 100.00
AA–
145,940
   
5.000%, 4/01/36 – NPFG Insured
      
250
  
Sacramento County Sanitation District Financing Authority, California, Revenue Bonds, Series
6/16 at 100.00
AA
255,175
   
2006, 5.000%, 12/01/31 – FGIC Insured
      
825
  
South Feather Water and Power Agency, California, Water Revenue Certificates of Participation,
4/13 at 100.00
A
827,731
   
Solar Photovoltaic Project, Series 2003, 5.375%, 4/01/24
      
1,000
  
Woodbridge Irrigation District, California, Certificates of Participation, Water Systems
7/13 at 100.00
A+
955,110
   
Project, Series 2003, 5.625%, 7/01/43
      
2,225
  
Total Water and Sewer
    
2,183,956
$                110,695
  
Total Investments (cost $87,584,421) – 100.4%
    
87,700,754
   
Floating Rate Obligations – (1.8)%
    
(1,540,000)
   
Other Assets Less Liabilities – 1.4%
    
1,180,168
   
Net Assets – 100%
    
$    87,340,922
 
 
Fair Value Measurements
 
Fair value is defined as the price that the Fund would receive upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market for the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The three-tier hierarchy of inputs is summarized in the three broad levels listed below:
 
Level 1 – Quoted prices in active markets for identical securities.
 
Level 2 – Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).
 
Level 3 – Significant unobservable inputs (including management’s assumptions in determining the fair value of investments).
 
The inputs or methodologies used for valuing securities are not an indication of the risk associated with investing in those securities. The following is a summary of the Fund’s fair value measurements as of June 30, 2011:
 
 
Level 1
    
Level 2
    
Level 3
    
Total
  
Investments:
                      
Municipal Bonds
 $ —     $ 87,700,754     $ —     $ 87,700,754  
 
During the period ended June 30, 2011, the Fund recognized no significant transfers to or from Level 1, Level 2 or Level 3.
 
Income Tax Information
 
The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate securities reflected as financing transactions, if any. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts on the Statement of Assets and Liabilities presented in the annual report, based on their federal tax basis treatment; temporary differences do not require reclassification. Temporary and permanent differences do not impact the net asset value of the Fund.
 
At June 30, 2011, the cost of investments was $86,036,432.
 
Gross unrealized appreciation and gross unrealized depreciation of investments at June 30, 2011, were as follows:
     
Gross unrealized:
    
   Appreciation
 $ 2,690,502  
   Depreciation
   (2,570,221 )
Net unrealized appreciation (depreciation) of investments
 $ 120,281  
 
(1)     
All percentages shown in the Portfolio of Investments are based on net assets.
(2)     
Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns.
(3)     
Ratings: Using the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investor Service, Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. Ratings below BBB by Standard & Poor’s, Baa by Moody’s or BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by any of these national rating agencies.
(4)     
Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities, which ensure the timely payment of principal and interest. Such investments are normally considered to be equivalent to AAA rated securities.
N/R
Not rated.
(UB)
Underlying bond of an inverse floating rate trust reflected as a financing transaction.
 
 
 
 
Item 2. Controls and Procedures.

a.  
The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
 
 
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.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: See EX-99 CERT attached hereto.

 
 
 
 
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)  Nuveen California Select Tax-Free Income Portfolio 
 
By (Signature and Title)     /s/ Kevin J. McCarthy                    
                                                   Kevin J. McCarthy
                                                   Vice President and Secretary
 
Date         August 29, 2011        
 
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 (Signature and Title)     /s/ Gifford R. Zimmerman                    
                                                    Gifford R. Zimmerman
                                                  Chief Administrative Officer (principal executive officer) 
 
Date         August 29, 2011        
 
By (Signature and Title)     /s/ Stephen D. Foy                              
                                                   Stephen D. Foy
                                                  Vice President and Controller (principal financial officer) 
 
Date         August 29, 2011