Corsan is a state-owned sanitation service provider in Rio Grande do Sul. Corsan's corporate goal is to conduct research, design, construction, operation, exploration and expansion of public services for the supply of drinking water and domestic wastewater. The company operates in 317 municipalities of Rio Grande do Sul, employing 5,681 people, providing 96.7% of universal access to drinking water in managed urban areas and 16.3% of universal access to sewerage. Thus, its coverage reaches about six million people.

Corsan also handles industrial effluent and solid waste from the Petrochemical Complex III, headquartered in Triunfo (RS), as well as industrial effluents from the General Motors do Brasil Automotive Industrial Complex in the municipality of Gravatai (RS).