SAO PAULO, July 1 /PRNewswire-FirstCall/ -- Companhia de Saneamento Basico do Estado de Sao Paulo - SABESP (NYSE: SBS; BM&FBovespa: SBSP3), (the "Registrant") respectfully notifies the Securities and Exchange Commission that it will not be able to timely file its annual report on Form 20-F for the fiscal year ended December 31, 2008. Since the end of first quarter of 2008, the Registrant and the State of Sao Paulo (the "State"), the major shareholder of the Registrant, have been in discussions to settle the outstanding debt owed by the State to the Registrant in respect of supplemental retirement and pension benefits (the "Benefits") that the Registrant paid from March 1986 up to December 2008 on behalf of the State to the former employees of the State-owned companies which merged to form the Registrant. On November 17, 2008, the Registrant and the State entered into an agreement to settle the outstanding debt relating to the Benefits. Pursuant to the agreement, the State acknowledges a portion of the outstanding debt, in the amount of R$915.3 million as of December 31, 2008, which the State will pay the Registrant through (i) the transfer of certain reservoirs to the Registrant, with an aggregate value of R$696.3 million, and (ii) 114 successive monthly installments, in the aggregate amount of R$219.0 million, as adjusted by inflation, plus annual interest accruing at the rate of 6%, beginning in November 2008. Despite the agreement, a portion of the outstanding debt owed by the State to the Registrant remains unsettled, totaling R$409.1 million (this amount does not include certain applicable adjustments) as of December 31, 2008 (the "Unsettled Amount"), because of divergent interpretations between the Registrant and the Public Attorney's Office of the State of Sao Paulo (the "Public Attorney's Office") relating to the calculation and eligibility criteria applicable to the Benefits. The State will not be able to finalize the discussions with the Registrant and enter into an agreement regarding the Unsettled Amount until the Public Attorney's Office issues a final interpretation of the calculation and eligibility criteria applicable to the Benefits. Based on opinions of external legal and accounting advisors, management believes that the Unsettled Amount is due to the Registrant by the State. Accordingly, the Registrant has not made any provisions for losses relating to the Unsettled Amount in the statement of income for the fiscal year ended December 31, 2008 in its primary financial statements under Brazilian GAAP. The Registrant's independent auditors disagreed with management and issued a qualified report for the fiscal year ended December 31, 2008. The Registrant filed the financial statements for the fiscal year ended December 31, 2008, containing the Registrant's independent auditors' qualified report, with the Brazilian Securities Commission (Comissao de Valores Mobiliarios) on March 27, 2009 and also furnished them to the Securities and Exchange Commission under a report on Form 6-K on May 29, 2009. The disagreement between the Registrant's independent auditors and management does not affect the reconciliation of the financial statements prepared under Brazilian GAAP to U.S. GAAP, since under U.S. GAAP the Registrant has already made provisions for losses relating to the Unsettled Amount in the statement of income for the fiscal year ended December 31, 2008. Once the Public Attorney's Office issues a final interpretation of the calculation and eligibility criteria applicable to the Benefits and the Registrant is able to finalize the discussions with the State and reach an agreement regarding the Unsettled Amount, the Registrant expects that its Registrant's independent auditors will have new facts to review the qualification in their report for the fiscal year ended December 31, 2008. However, the Registrant cannot assure that based on the new facts the Registrant's independent auditors will be able to issue a report without the qualification for the fiscal year ended December 31, 2008. The Public Attorney's Office has recently informed the Registrant that it expects to issue a final interpretation of the calculation and eligibility criteria applicable to the Benefits by the end of July 2009. The Registrant believes that, after it is able to finalize the discussions with the State and reach an agreement regarding the Unsettled Amount, the Registrant will need additional work and time to restate its financial statements for the fiscal year ended December 31, 2008 accordingly. In light of the above, the Registrant is unable to timely file its annual report on Form 20-F for the fiscal year ended December 31, 2008. In addition, at this stage, the Registrant is not in a position to determine when it will be able to file its 2008 annual report on Form 20-F for the fiscal year ended December 31, 2008. Significant change to Registrant's net income The Registrant anticipates that there may be a significant change in the Registrant's results of operations for the fiscal year ended December 31, 2008 if the State does not acknowledge that it owes to the Registrant the Unsettled Amount or a portion thereof. In this case, the Registrant may make provisions for losses accordingly in the statement of income for the fiscal year ended December 31, 2008 in its primary financial statements under Brazilian GAAP, which may cause a significant change in the Registrant's net income for the fiscal year ended December 31, 2008. The State will not be able to enter into an agreement with the Registrant regarding the Unsettled Amount until the Public Attorney's Office issues a final interpretation of the calculation and eligibility criteria applicable to the Benefits. Thus, at this stage, the Registrant does not know if it will reach an agreement with the State regarding the Unsettled Amount or a portion thereof and, as a result, if any provision for losses will be made accordingly. Therefore, the Registrant is not in a position to make a reasonable estimate of the significant change in the Registrant's net income, if any. The Public Attorney's Office has recently informed the Registrant that it expects to issue a final interpretation of the calculation and eligibility criteria applicable to the Benefits by the end of July 2009. IR Contact: Mario Arruda Sampaio (Ph.: 5511 3388-8664 / e-mail: ) Angela Beatriz Airoldi (Ph.: 5511 3388-8793 / e-mail: ) DATASOURCE: SABESP CONTACT: Mario Arruda Sampaio, +011-5511-3388-8664, ; or Angela Beatriz Airoldi, +011-5511-3388-8793, , both of SABESP

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