ETE Paulínia Wastewater Treatment Plant, Paulínia, São Paulo, Brazil

ETE Paulínia is a municipal wastewater treatment plant located in Paulínia, within the Campinas metropolitan region of São Paulo, Brazil. The plant serves a population of approximately 83,845 people, placing it in the medium-to-large agglomeration category for Brazilian wastewater infrastructure. Brazil's wastewater treatment is regulated under federal laws such as the National Environmental Policy and the National Water Resources Policy, with oversight by state environmental agencies like CETESB in São Paulo. For plants of this scale, secondary treatment is typically required, and effluent standards are enforced through operating permits. The plant's capacity and treatment process details are not publicly available, but it operates within a well-established regulatory framework. The plant's treated effluent is discharged into local water bodies that drain into the Piracicaba River basin, a key tributary of the Tietê River. The Tietê River flows through São Paulo state and eventually reaches the Paraná River basin, which is vital for agriculture, industry, and drinking water supplies. The region's watershed supports diverse aquatic life and is important for regional water security.

The plant discharges into local streams that feed the Piracicaba River, a major tributary of the Tietê River. The Tietê River flows across São Paulo state and joins the Paraná River, which drains into the Río de la Plata estuary. The watershed supports diverse aquatic ecosystems and is critical for water supply in one of Brazil's most industrialized regions. Proper treatment is essential to prevent nutrient pollution and protect downstream water quality.