ETE ABC Wastewater Treatment Plant, São Paulo, Brazil

ETE ABC is a major wastewater treatment facility located in the Sacomã district of São Paulo, Brazil. Serving a population of approximately 277,093, it is classified as a large agglomeration under Brazilian regulatory frameworks. The plant is situated in the densely urbanized Metropolitan Region of São Paulo, one of the largest urban areas in the Southern Hemisphere. As a large-scale plant, ETE ABC is expected to meet stringent treatment standards under Brazil's National Environmental Council (CONAMA) resolutions, which mandate secondary or advanced treatment for facilities of this size to protect water quality. The plant's designed capacity is 1.00 cubic meter per second, indicating substantial infrastructure to handle the region's wastewater load. The treated effluent from ETE ABC ultimately discharges into the Tietê River basin, which flows through São Paulo state and into the Paraná River system, eventually reaching the Río de la Plata estuary. The Tietê River is ecologically significant, supporting diverse aquatic life and providing water for millions of people downstream. The plant plays a critical role in reducing pollution loads to this vital waterway.

ETE ABC discharges into the Tietê River basin, which flows through the São Paulo metropolitan area and joins the Paraná River system. The Tietê River is a major watercourse in southeastern Brazil, ultimately draining into the Río de la Plata estuary. The river supports diverse aquatic ecosystems and is a crucial water source for agriculture, industry, and drinking water. The plant's operations help mitigate pollution impacts on this ecologically sensitive river system, which faces pressures from urbanization and industrial activity.