ETE Ligeiro Wastewater Treatment Plant, Pato Branco, Paraná, Brazil

ETE Ligeiro is a wastewater treatment plant located in the Fraron district of Pato Branco, in the state of Paraná, Brazil. The plant serves a population of approximately 58,080 people, placing it in the medium agglomeration category for Brazilian wastewater infrastructure. Pato Branco is situated in the southern region of Brazil, an area characterized by subtropical climate and rolling hills. As a Brazilian wastewater facility, ETE Ligeiro operates under the national regulatory framework established by the Ministry of Cities and state environmental agencies such as Instituto Água e Terra (IAT) in Paraná. For plants serving populations of this scale, secondary treatment is typically required to meet effluent standards for organic matter and suspended solids. The treated effluent from ETE Ligeiro is discharged into local watercourses that ultimately drain into the Iguaçu River basin, one of the major river systems in southern Brazil. The Iguaçu River flows westward and eventually joins the Paraná River, forming part of the larger Paraná Basin. This region supports diverse aquatic life and is important for regional water supply and agriculture.

ETE Ligeiro discharges into local streams that are part of the Iguaçu River basin. The Iguaçu River flows through Paraná and joins the Paraná River, which empties into the Río de la Plata estuary. The watershed supports diverse aquatic ecosystems, including fish species important for local fisheries. Downstream areas include agricultural lands and urban centers that rely on the river for water supply.