ETE Aparecida d'Oeste - Wastewater Treatment Plant in Aparecida d'Oeste, São Paulo, Brazil

ETE Aparecida d'Oeste is a municipal wastewater treatment plant located in Aparecida d'Oeste, a city in the São Paulo state of Brazil. The plant serves a population of approximately 3,366 residents, placing it in the small-agglomeration category under Brazilian wastewater management frameworks. The plant provides secondary treatment, which is the standard level required for urban wastewater in Brazil under national regulations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids, ensuring effluent quality meets basic environmental standards before discharge. The treated effluent is discharged into local water bodies that drain into the Paraná River basin, one of South America's major river systems. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's aquatic environments.

The plant discharges into local streams that flow into the Paraná River basin, which ultimately drains into the Río de la Plata estuary. The region supports diverse aquatic life and is important for migratory fish species. Proper wastewater treatment helps maintain water quality in this ecologically sensitive basin.