ETE Estrada Municipal SFS 255 - Santa Fé do Sul Wastewater Treatment Plant, São Paulo, Brazil

ETE Estrada Municipal SFS 255 is a wastewater treatment plant serving the municipality of Santa Fé do Sul in the state of São Paulo, Brazil. The plant is designed to handle a capacity of 1.00 and serves a population of approximately 8,426 residents, placing it in the small agglomeration category. As a Brazilian wastewater facility, the plant operates under the national regulatory framework established by the Ministry of Cities and state environmental agencies such as CETESB in São Paulo. For agglomerations of this size, secondary treatment is typically required to meet effluent standards for organic matter and suspended solids. The plant's treated effluent is discharged into local water bodies that ultimately drain into the Paraná River basin, one of South America's major river systems. The downstream environment supports diverse aquatic life and provides water for agricultural and urban uses, making proper treatment essential for maintaining water quality.

The plant discharges into the Paraná River basin, which flows through southeastern Brazil and eventually reaches the Río de la Plata estuary. The region's aquatic ecosystems support diverse fish species and provide critical habitat for migratory birds. Maintaining effective wastewater treatment is important to prevent nutrient enrichment and protect downstream water quality.