Companhia de Saneamento Basico Sabesp : Extraordinary Shareholders' Meeting

The shareholders of Companhia de Saneamento Básico do Estado de São Paulo - Sabesp ('Company') are hereby invited, pursuant to Article 5, paragraph 1 of the Bylaws, to the Extraordinary Shareholders' Meetings to be held on July 28, 2016, at 11:00 a.m., at the Company's headquarters, at Rua Costa Carvalho nº 300, in the city and state of São Paulo, to resolve on the following matters:

I. Definition of the number of members to compose the Board of Directors.

II. Election of a member of the Board of Directors to complete the term of office until the Annual Shareholders' Meeting of 2018.

III. Rectification of the overall annual compensation of the Management and Fiscal Council members for 2016 approved at the Company's Annual Shareholders' Meeting held on April 29, 2016 due to the change of the number of members of the Board of Directors provided for in the item (I) above.

Proof of the status of shareholder may be required at any time before the opening of the Extraordinary Shareholders' Meetings by presentation of (i) identification, and/or related articles of incorporation that prove legal representation, as applicable, (ii) proof of ownership and the number of shares held issued by the depositary financial institution; and (iii) in the case of proxy representation, the applicable proxy appointment duly notarized and granted within the last 12 months, accompanied by the identification and/or related articles of incorporation of the proxy, as applicable.

The documents related to the matters to be discussed in the Extraordinary Shareholders' Meeting will be available to shareholders at the Company's headquarters and electronically, on the website of the CVM, pursuant to CVM Instruction 481/2009.

São Paulo, June 28, 2016.

Benedito Pinto Ferreira Braga Junior
Chairman
Board of Directors