ETE RIVERSUL Wastewater Treatment Plant, Riversul, São Paulo, Brazil

ETE RIVERSUL is a municipal wastewater treatment plant located in the Bairro da Taboa area of Riversul, in the state of São Paulo, Brazil. The facility serves a population of about 3,864 people, classifying it as a small-scale treatment plant within the region's sanitation infrastructure. The plant operates with secondary treatment, which is the standard biological process required for organic matter removal. Under Brazilian regulations (CONAMA resolutions and state-level environmental laws), secondary treatment is typically mandated for inland communities to protect receiving water bodies. The plant discharges an average of 397.90 m³/day of treated effluent. The treated wastewater from ETE RIVERSUL is discharged into local watercourses that eventually drain into the Paranapanema River basin, a major tributary of the Paraná River. This river system supports diverse aquatic life and provides water for downstream communities and agriculture. The plant plays a key role in preventing untreated sewage from entering these waters, thereby reducing nutrient loading and protecting water quality in the broader Paraná River watershed.

ETE RIVERSUL discharges into small streams within the Paranapanema River basin, which flows into the Paraná River and ultimately reaches the Río de la Plata estuary. The region's aquatic ecosystems support fish populations and riparian habitats.