SABESP Announces Dividend Payment in the Form of Interest on Own Capital

SAO PAULO, Feb. 12 /PRNewswire-FirstCall/ -- Companhia de Saneamento Basico do Estado de Sao Paulo - SABESP (NYSE: SBS; BM&FBovespa: SBSP3), announces that on February 11, 2010, the Board of Executive Officers proposed and the Board of Directors resolved on, pursuant to item XI of article 14 and paragraph 1 of article 29 of the Company's Bylaws, the payment of dividends in the form of interest on own capital related to the month of December 2009, to the Shareholders registered as such on February 26, 2010.

The dividends as interest on own capital, totaling R$ 34,175,493.45 and corresponding to R$ 0.15 per common share, will be paid no later than sixty days after the 2010 Annual Shareholders' Meeting.

Income tax shall be withheld from payment of dividends as interest on own capital, pursuant to the laws in effect, except for the immune or exempt shareholders proving such condition until March 15, 2010, and corresponding documents shall be sent to the Company's headquarters.

Referring to the entities of Supplementary Private Pension, Insurance Companies and Fapi, such proof shall occur by means of Declaration, a model of which is available at the Investors Area, in the item Information to Shareholders on the website http://www.sabesp.com.br/.

The aforementioned interest on own capital will be computed in the calculation of the mandatory minimum dividends, as provided for in the caput of Article 29 of the Company's Bylaws, pursuant to article 9, paragraph 7, of Law 9,249/95.

The shareholders will have their credits available on the initial date of payment of such right, as set forth in item I, in accordance with their checking account and domicile provided to Banco Itau Unibanco S.A.

For shareholders whose registry information includes neither their Individual/Corporate Taxpayer's Identification Number nor completion of banking instructions, the interest will be credited, pursuant to item I, as of the third business day counted from the date of registry update in Banco Itau S.A.'s electronic files.

The shares are now traded ex-interest from March 1st, 2010.

Further information may be obtained at any of Banco Itau Unibanco S.A.'s branches, which specialize in assisting shareholders.

The complete version is available at the Company's website: http://www.sabesp.com.br/

For further information, please contact: Mario Arruda Sampaio Phone: [phone] E-mail: [e-mail] Angela Beatriz Airoldi Phone: [phone] E-mail: [e-mail]

SABESP

CONTACT: Mario Arruda Sampaio, +011-55-11-3388-8664,
[e-mail], or Angela Beatriz Airoldi, +011-55-11-3388-8793,
[e-mail], both of SABESP

Web site: http://www.sabesp.com.br/