SAO PAULO, Jan. 20, 2012 /PRNewswire/ -- Companhia de Saneamento Basico do Estado de Sao Paulo - SABESP (BM&FBovespa: SBSP3; NYSE: SBS), one of the largest water and sewage service providers in the world based on number of customers, hereby informs its shareholders and the market in general that the Sao Paulo State Sanitation and Energy Regulatory Agency (ARSESP) disclosed the Detailed Methodology for SABESP's Tariff Revision Process on January 17, 2012 (Technical Note RTS/01/2012).
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