ETE Capim Fino Wastewater Treatment Plant, Piracicaba, São Paulo

ETE Capim Fino is a wastewater treatment facility located in Piracicaba, within the state of São Paulo, Brazil. The plant serves a population of around 4,946 residents, classifying it as a small-scale municipal treatment system. Its location in the southeastern region of Brazil places it within a densely populated and industrialized area, where water resource management is critical. As a small agglomeration, the plant is subject to Brazil's national environmental standards, which require appropriate treatment to protect water quality. Plants of this scale typically employ biological treatment systems such as activated sludge or stabilization ponds to meet discharge standards. The regulatory framework in Brazil, including CONAMA resolutions, sets effluent quality limits for parameters like BOD and TSS. The plant's treated effluent is discharged into local water bodies that ultimately flow into the Piracicaba River, a tributary of the Tietê River basin. The Tietê River is a major waterway in São Paulo state, flowing into the Paraná River system and eventually reaching the Río de la Plata estuary. This downstream connection highlights the plant's role in protecting regional water quality and aquatic ecosystems.

The plant discharges into the Piracicaba River watershed, which is part of the larger Tietê River basin. The Tietê River flows through São Paulo state and joins the Paraná River, ultimately draining into the Río de la Plata estuary. This basin supports diverse aquatic life and provides water for agriculture, industry, and drinking water for millions. The region's subtropical climate and urban development make effective wastewater treatment essential to prevent eutrophication and protect downstream ecosystems.