ETE Alvaro de Carvalho - Secondary Wastewater Treatment in Álvaro de Carvalho, São Paulo

ETE Alvaro de Carvalho is a municipal wastewater treatment plant located in Álvaro de Carvalho, a small town in the state of São Paulo, Brazil. The plant serves a population of 3,117 and operates with secondary treatment, which is appropriate for a community of this size. Brazil's wastewater treatment standards are governed by federal regulations such as CONAMA Resolution 430/2011, which sets effluent quality requirements for discharges into water bodies. For small agglomerations like Álvaro de Carvalho, secondary treatment is typically sufficient to meet these standards and protect local water quality. The treated effluent is discharged into local watercourses that drain into the Paraná River basin, one of the most important river systems in South America. The plant plays a key role in preventing untreated sewage from entering the region's waterways, thereby supporting downstream ecosystems and communities.

The plant discharges into streams that flow into the Tietê River, a major tributary of the Paraná River basin. The Paraná River ultimately reaches the Río de la Plata estuary. The region's aquatic ecosystems support diverse fish and wildlife, and the plant's secondary treatment helps reduce nutrient and organic loads that could otherwise cause eutrophication in downstream water bodies.