ETE ABC Wastewater Treatment Plant, São Paulo, Brazil

ETE ABC is a wastewater treatment plant located in the Sacomã district of São Paulo, Brazil. Serving a population equivalent of approximately 147,049, it is a medium-to-large agglomeration within the São Paulo metropolitan region. The plant is situated in the southeastern region of Brazil, an area characterized by dense urban development and significant industrial activity. As a facility of this scale in Brazil, ETE ABC is subject to the National Environmental Council (CONAMA) resolutions and state-level environmental regulations, which mandate appropriate treatment levels to protect water quality. Plants of this size typically employ secondary or tertiary treatment to meet discharge standards. The designed capacity volume is 1.00, indicating the plant's intended throughput. The plant's treated effluent ultimately discharges into the local drainage network, which flows into the Tietê River basin. The Tietê River is a major watercourse in São Paulo state, eventually reaching the Paraná River basin and the Río de la Plata estuary. This downstream environment supports diverse aquatic life and is important for regional water supply and ecosystem health.

ETE ABC discharges into the Tietê River basin, which flows through the São Paulo metropolitan region and eventually joins the Paraná River system. The Tietê River is ecologically significant, supporting a variety of fish species and providing water for agriculture and industry downstream. The plant's operations help mitigate pollution in this heavily urbanized watershed, reducing nutrient and pathogen loads that could otherwise impact the river's health and the Paraná River basin.