ETE Silveiras Wastewater Treatment Plant, Silveiras, São Paulo, Brazil

ETE Silveiras is a municipal wastewater treatment plant located in Silveiras, a city in the state of São Paulo, Brazil. The plant serves a population of about 2,921 people, placing it in the small agglomeration category under Brazilian regulatory frameworks. The plant provides secondary treatment, which is the standard level required for most urban wastewater in Brazil under CONAMA Resolution 430/2011 and state-level regulations. Secondary treatment typically involves biological processes to remove organic matter and suspended solids, ensuring effluent quality before discharge. The treated effluent is discharged into local water bodies within the Paraíba do Sul River basin, a major watershed that supplies water to millions in southeastern Brazil. The downstream environment includes the Paraíba do Sul River, which flows into the Atlantic Ocean near Campos dos Goytacazes, supporting diverse aquatic life and providing water for agriculture and industry.

The plant discharges into the Paraíba do Sul River basin, which drains into the Atlantic Ocean. The river is a vital water source for the region, supporting ecosystems and human activities. The watershed is ecologically sensitive, hosting diverse fish species and serving as a migratory corridor for aquatic fauna. Proper treatment helps protect downstream water quality and biodiversity.