ETE Santa Fe Pirassununga - Secondary Wastewater Treatment Plant in Pirassununga, São Paulo

ETE Santa Fe Pirassununga is a wastewater treatment plant located in Pirassununga, within the state of São Paulo, Brazil. The facility serves a population of approximately 3,492 residents, classifying it as a small-scale municipal treatment plant. It is situated in the Cachoeira de Emas area, part of the broader Piracicaba metropolitan region. The plant provides secondary treatment, which is the standard biological treatment level required for municipal wastewater in Brazil under federal regulations such as CONAMA Resolution 430/2011. This process typically involves biological degradation of organic matter followed by sedimentation. The treated effluent is discharged into a local watercourse that eventually drains into the Piracicaba River basin, a major tributary of the Tietê River. The Tietê River flows through São Paulo state and ultimately reaches the Paraná River basin, which is ecologically significant for its diverse aquatic life and importance to regional water supply. The plant's operation helps protect downstream water quality in this densely populated and industrialized region.

The plant discharges into the Piracicaba River basin, which flows into the Tietê River and eventually the Paraná River system. This watershed supports diverse aquatic ecosystems and provides water for agriculture, industry, and municipalities. The region is part of the Atlantic Forest biome, with sensitive riparian habitats that benefit from reduced nutrient and organic pollution from secondary treatment.