Companhia Catarinense de Águas e Saneamento (Casan) is a mixed capital company established in 1970, operating in the sanitation sector in Brazil, particularly in Santa Catarina. It manages water supply and sewage systems through agreements with municipal governments, serving over 2.7 million residents across 195 municipalities. Casan also supplies water wholesale to additional municipalities, reaching a broader population.

Casan provides potable water services with a coverage rate of 99%, exceeding national and state averages. The company manages sewage collection and treatment, with plans to expand its coverage significantly. Additionally, Casan is involved in waste management services and focuses on improving operational processes, enhancing energy efficiency, and protecting water resources. Its investments aim to improve public health and environmental sustainability, aligning with Brazil’s National Basic Sanitation Plan.

Casan's strategic focus includes expanding its services and improving quality and efficiency, making it a vital player in the sanitation sector in southern Brazil.