ETE SUL BACIA 2 Wastewater Treatment Plant, Sarandi, Paraná, Brazil

ETE SUL BACIA 2 is a wastewater treatment plant located in Sarandi, within the Maringá region of Paraná, Brazil. The plant serves a population of approximately 6,133 people, classifying it as a small-scale municipal facility in the southern region of the country. Brazil's wastewater treatment framework is governed by federal laws such as the National Water Resources Policy (Law 9.433/1997) and CONAMA resolutions, which set discharge standards and treatment requirements. For small agglomerations like this, secondary treatment is typically expected to protect water quality, though specific treatment levels are determined by local environmental agencies. The plant's treated effluent is discharged into local water bodies that are part of the Paraná River basin, one of South America's major river systems. The downstream environment includes rivers that flow into the Paraná River, eventually reaching the Río de la Plata estuary. This region supports diverse aquatic life and is important for regional agriculture and water supply.

The plant discharges into local streams within the Paraná River basin, which flows southward through Brazil, Paraguay, and Argentina before emptying into the Río de la Plata estuary. The downstream environment includes ecologically sensitive areas that support diverse fish species and migratory birds. Protecting water quality in this basin is critical for maintaining regional biodiversity and supporting downstream communities.