ETE Bom Sucesso de Itararé - Secondary Wastewater Treatment Plant in São Paulo, Brazil

ETE Bom Sucesso de Itararé is a wastewater treatment plant located in the rural area of Ponderosa, Bom Sucesso de Itararé, in the state of São Paulo, Brazil. The plant serves a small population of 1,976 residents and operates with secondary treatment, which is appropriate for communities of this scale in the region. As a secondary treatment facility, the plant uses biological processes to remove organic matter and suspended solids, meeting the basic standards required for municipal wastewater in Brazil. The plant discharges an average of 167.95 cubic meters of treated effluent daily, contributing to the protection of local water quality. The treated effluent flows into nearby streams that are part of the Paranapanema River basin, which ultimately drains into the Paraná River and then into the Río de la Plata estuary. This watershed supports diverse aquatic life and is important for regional agriculture and water supply.

The plant's discharge enters small tributaries of the Paranapanema River, a major watercourse in southeastern Brazil that flows into the Paraná River. The Paraná River system is ecologically significant, hosting diverse fish species and providing water for irrigation and human consumption. The secondary treatment helps reduce nutrient and organic pollution, protecting downstream aquatic habitats from eutrophication and oxygen depletion.