ETE BASSI Wastewater Treatment Plant, Tatuí, São Paulo, Brazil

ETE BASSI is a wastewater treatment plant located in the Jardim Rosa Garcia neighborhood of Tatuí, in the state of São Paulo, Brazil. The plant serves a population of around 6,656 people, placing it in the small agglomeration category under Brazilian regulatory frameworks. The plant provides secondary treatment, which is the minimum standard required by Brazilian regulations (CONAMA Resolution 430/2011) for most inland water bodies. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant discharges approximately 991 m³ of treated wastewater per day. The treated effluent from ETE BASSI is discharged into a local water body within the Sorocaba River basin, which flows into the Tietê River and eventually reaches the Paraná River basin. This region is part of the Atlantic Forest biome, and the water bodies support diverse aquatic life and provide water for downstream communities and agriculture.

The plant discharges into a tributary of the Sorocaba River, which flows into the Tietê River, a major waterway in São Paulo state. The Tietê River ultimately drains into the Paraná River basin, which is ecologically significant for its biodiversity and as a water source for millions. The surrounding region is part of the Atlantic Forest biome, a global biodiversity hotspot, and the local watershed supports sensitive aquatic ecosystems that benefit from proper wastewater treatment.