The company provides water to about 23.6 million people and sewage services to 20 million people. The company also sells wholesale treated water to seven municipalities (3.6 million people). It provides its services to about 363 out of 645 municipalities in Sao Paulo. The Sao Paulo region represents about 74.4% of the company's total revenue. Sabesp water and sewage services are regulated by the Sao Paulo Sanitation and Energy Regulatory Agency. While its commercial activities, performance and track record are monitored by the Brazilian Securities Exchange Commission, Sao Paulo Stock Exchange as well as New York stock Exchange among other institutions.