Companhia de Saneamento Basico do Estado de Sao Paulo. 

SABESP, or Companhia de Saneamento Básico do Estado de São Paulo, is a key utility provider specializing in water and sewage services for residential, commercial, industrial, and governmental clients. Its offerings are comprehensive, spanning water supply, sanitary sewage systems, urban rainwater management and drainage, municipal cleaning, and solid waste management. The company's operations also encompass planning, system operation, maintenance, and the commercialization of energy. As of December 31, 2021, SABESP delivered water services to approximately 27.8 million people through 9.8 million connections and provided sewage services to about 24.6 million individuals via 8.4 million connections. Its expansive infrastructure included 88,904 kilometers of water pipes and transmission lines, alongside 61,122 kilometers of sewer lines. Furthermore, through special purpose companies, SABESP extends its water and/or sewage provisions to four additional municipalities. The company was established in 1954 and is headquartered in São Paulo, Brazil.