ETE Paranapanema Wastewater Treatment Plant, Paranapanema, São Paulo

ETE Paranapanema is a municipal wastewater treatment plant located in Paranapanema, within the state of São Paulo, Brazil. The facility serves a population of around 10,577 people, classifying it as a small to medium agglomeration under Brazilian sanitation standards. It is situated inland, away from coastal areas, and operates under Brazil's national environmental regulations. The plant provides secondary treatment, which is the standard level required for urban wastewater in Brazil under the National Environmental Council (CONAMA) resolutions. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's discharge volume of 997.30 cubic meters indicates its operational scale. The treated effluent is discharged into local water bodies, contributing to the protection of the Paranapanema River basin. This region is part of the larger Paraná River system, which supports diverse aquatic ecosystems and is vital for water supply and agriculture. The plant plays a key role in maintaining water quality in the watershed, reducing pollution loads from urban runoff and domestic sewage.

The plant discharges into the Paranapanema River basin, a tributary of the Paranapanema River, which flows into the Paraná River and eventually reaches the Río de la Plata estuary. The watershed supports a mix of agricultural and urban land uses, and the plant's secondary treatment helps mitigate nutrient and organic pollution, protecting downstream aquatic habitats and water quality for communities.