ETE ASSIS JACU Wastewater Treatment Plant, Cândido Mota, São Paulo, Brazil

ETE ASSIS JACU is a wastewater treatment plant located in Cândido Mota, within the state of São Paulo, Brazil. It serves a population of approximately 28,785 people, placing it in the medium-sized agglomeration category for Brazilian wastewater infrastructure. The plant is situated inland, away from coastal areas, and its operations are part of the broader sanitation network in the Região Imediata de Assis. As a facility in Brazil, ETE ASSIS JACU is subject to the national environmental standards set by CONAMA (Conselho Nacional do Meio Ambiente) and state-level regulations from CETESB (Companhia Ambiental do Estado de São Paulo). For a plant serving this population size, secondary treatment is typically required to reduce organic load and suspended solids before discharge. It is expected to meet the effluent quality standards mandated by Brazilian law. The treated wastewater from ETE ASSIS JACU is discharged into a local watercourse that ultimately drains into the Paraná River basin, one of the most significant hydrological systems in South America. The Paraná River flows through Brazil, Paraguay, and Argentina before emptying into the Río de la Plata estuary. The plant's operations contribute to protecting downstream water quality and aquatic ecosystems in this major river basin.

The plant discharges into a tributary of the Paraná River basin, which flows through the interior of São Paulo state. The Paraná River system supports diverse aquatic life and is a critical water resource for agriculture, industry, and municipalities. Downstream, the river joins the Paraguay and Uruguay rivers to form the Río de la Plata, a large estuary that sustains important fisheries and migratory species. Protecting water quality in this basin is essential for maintaining ecological balance and human uses.