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

FORM 12b-25

NOTIFICATION OF LATE FILING

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SEC FILE NUMBER
001-31317

CUSIP NUMBER
20441A102

(Check One): o Form 10-K     x Form 20-F      o Form 11-K     o Form 10-Q     o Form 10-D     o Form N-SAR     o Form N-CSR

                             For Period Ended: December 31, 2007
                             [ ] 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:      N/A         

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

COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO - SABESP

Full Name of Registrant: 

N/A 

Former Name if Applicable: 

RUA COSTA CARVALHO, 300

Address of Principal Executive Office (Street and Number)

SÃO PAULO, SP, BRAZIL, 05429-900

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 Form 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.

SEC 1344 (05-06) Persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

(Attach extra Sheets if Needed)
PART IV -- OTHER INFORMATION

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

RUI DE BRITTO ÁLVARES AFFONSO	55-11	3388-8247
(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     oNo

(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?

oYes    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.

COMPANHIA DE SANEAMENTO BÁSICO DO ESTADO DE SÃO PAULO - SABESP
_____________________________________________
(Name of Registrant as Specified in Charter)

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

Date: June 27, 2008	By:	/s/  RUI DE BRITTO ÁLVARES AFFONSO
		RUI DE BRITTO ÁLVARES AFFONSO
		Chief Financial Officer and Investor Relations Officer

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

GENERAL INSTRUCTIONS

1.	This form is required by Rule 12b-25 (17 CFR 240.12b-25) of the General Rules and Regulations under the Securities Exchange Act of 1934.
2.	One signed original and four conformed copies of this form and amendments thereto must be completed and filed with the Securities and Exchange Commission, Washington, D.C. 20549, in accordance with Rule 0-3 of the General Rules and Regulations under the Act. The information contained in or filed with the form will be made a matter of public record in the Commission files.
3.	A manually signed copy of the form and amendments thereto shall be filed with each national securities exchange on which any class of securities of the registrant is registered.
4.	Amendments to the notifications must also be filed on Form 12b-25 but need not restate information that has been correctly furnished. The form shall be clearly identified as an amended notification.
5.	Electronic Filers: This form shall not be used by electronic filers unable to timely file a report solely due to electronic difficulties. Filers unable to submit reports within the time period prescribed due to difficulties in electronic filing should comply with either Rule 201 or Rule 202 of Regulation S-T (§232.201 or §232.202 of this chapter) or apply for an adjustment in filing date pursuant to Rule 13(b) of Regulation S-T (§232.13(b) of this chapter).

Companhia de Saneamento Básico do Estado de São Paulo 
Diretoria Econômico-Financeira e de Relações com Investidores 
R. Costa Carvalho, 300 – Pinheiros – CEP 05429-900 – São Paulo, SP 
Tel. (11) 3388-8247 – Fax (11) 3315-4465 
www.sabesp.com.br 

Form 12b-25

NOTIFICATION OF LATE FILING

Exhibit 1

PART III - NARRATIVE

Sabesp needs additional time to conclude internal discussions and further review the document to ensure adequate disclusure of certain information. As a result, the company will not be able to file it´s 2007 annual report on Form 20-F by the prescribed filing deadline of June 30, without unreasonable effort on Sabep´s part. Sabesp will, however, file its 2007 annual report on Form 20-F by July 15, 2008.