ETE Catiguá Wastewater Treatment Plant - Catiguá, São Paulo, Brazil

ETE Catiguá is a municipal wastewater treatment plant located in Catiguá, a city in the state of São Paulo, Brazil. The plant serves a population of about 6,801 residents, making it a small-scale facility within the region's sanitation infrastructure. It is situated inland, over 50 km from the coast, 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 CONAMA Resolution 430/2011 and other federal norms. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's capacity and discharge volume indicate it handles a modest flow of approximately 915 m³/day. The treated effluent from ETE Catiguá is discharged into local watercourses that drain into the Paraná River basin, one of South America's major river systems. The Paraná River ultimately flows into the Río de la Plata estuary. The plant plays a key role in protecting downstream water quality and aquatic ecosystems in this agriculturally important region.

ETE Catiguá discharges into streams that are part of the Paraná River basin, which drains a vast area of southeastern Brazil and eventually reaches the Río de la Plata estuary. The region is characterized by intensive agriculture, particularly sugarcane and citrus, which can contribute to nutrient runoff. The plant's secondary treatment helps reduce organic pollution and nutrient loads, protecting downstream aquatic habitats and supporting biodiversity in the Paraná River system.