ETE TUPI Wastewater Treatment Plant, Piracicaba, São Paulo, Brazil

ETE TUPI is a wastewater treatment plant located in the Tupi district of Piracicaba, in the state of São Paulo, Brazil. The plant serves a population of about 5,178 people, placing it in the small agglomeration category for Brazilian wastewater infrastructure. As a small-scale municipal plant in Brazil, ETE TUPI is subject to CONAMA Resolution 430/2011 and state-level environmental regulations from CETESB, which set effluent discharge standards. Plants of this size typically employ secondary treatment systems such as activated sludge or stabilization ponds to meet regulatory requirements. The plant's treated effluent is discharged into local water bodies within the Piracicaba River basin, which flows into the Tietê River and eventually reaches the Paraná River basin. This watershed supports diverse aquatic life and provides water for agriculture and urban use in the region.

ETE TUPI discharges into the Piracicaba River basin, part of the larger Tietê River watershed that drains into the Paraná River and ultimately the Río de la Plata estuary. The Piracicaba River is ecologically significant, supporting fish species and providing water for irrigation and drinking water downstream. The region's subtropical climate with seasonal rainfall influences flow patterns and pollutant dilution.