ETE Paulistano I Wastewater Treatment Plant, Franca, São Paulo

ETE Paulistano I is a municipal wastewater treatment plant located in the Jardim Paulistano neighborhood of Franca, in the state of São Paulo, Brazil. The plant serves a population of 5,675 people, classifying it as a small agglomeration under Brazilian regulatory frameworks. The plant employs secondary treatment, which is the minimum standard required by Brazilian environmental legislation (CONAMA resolutions) for most inland water bodies. This level of treatment typically involves biological processes to remove organic matter and suspended solids, ensuring the effluent meets quality standards before discharge. The treated wastewater from ETE Paulistano I is discharged into local watercourses that eventually drain into the Rio Grande, a major tributary of the Paraná River basin. This region is part of the Paraná River system, which flows into the Río de la Plata estuary. The plant plays a key role in protecting downstream water quality and aquatic ecosystems.

The plant discharges into local streams that feed into the Rio Grande, a major river in the Paraná basin. This watershed supports diverse aquatic life and is important for regional water supply and agriculture. The downstream environment includes the Paraná River floodplain, which is ecologically sensitive and hosts important wetlands and riparian forests. Proper treatment at ETE Paulistano I helps reduce nutrient and organic pollution entering this system.