ETE RIO SOROCABA Wastewater Treatment Plant, Cerquilho, São Paulo

ETE RIO SOROCABA is a wastewater treatment plant located in Cerquilho, within the Sorocaba metropolitan region of São Paulo state, Brazil. The plant serves a population of approximately 8,575 residents, classifying it as a small to medium agglomeration under Brazilian sanitation standards. Brazil's wastewater treatment regulations are governed by federal laws such as the National Environmental Policy and CONAMA resolutions, which set discharge standards for organic matter and nutrients. Plants of this scale typically employ secondary treatment processes, such as activated sludge or anaerobic systems, to meet these standards. The plant's operational details are managed by the municipal sanitation service. The treated effluent from ETE RIO SOROCABA is discharged into the Sorocaba River, a tributary of the Tietê River, which flows through São Paulo state and eventually reaches the Paraná River basin. This river system supports diverse aquatic life and is used for water supply, recreation, and agriculture downstream. Proper treatment helps protect water quality in this ecologically important watershed.

The plant discharges into the Sorocaba River, which flows into the Tietê River, a major watercourse in São Paulo state. The Tietê River ultimately drains into the Paraná River basin, which empties into the Río de la Plata estuary. This watershed supports diverse aquatic ecosystems and provides water for millions of people. Effective wastewater treatment is crucial to prevent nutrient pollution and protect downstream habitats.