ETE SETE BARRAS Wastewater Treatment Plant, Sete Barras, São Paulo

ETE SETE BARRAS is a municipal wastewater treatment plant located in Sete Barras, a municipality in the state of São Paulo, Brazil. The plant serves a population of about 5,725 people, reflecting its role in managing domestic wastewater for this small community in the Ribeira Valley region. The plant provides secondary treatment, which is the standard level required under Brazilian regulations (CONAMA 430/2011) for most inland water bodies. This treatment typically involves biological processes to reduce organic matter and suspended solids. The plant discharges an average of 694.18 m³/day of treated effluent. The treated effluent is released into local watercourses that drain into the Ribeira de Iguape River basin, one of the most important river systems in southeastern Brazil. This basin supports significant Atlantic Forest remnants and diverse aquatic life. Proper treatment at ETE SETE BARRAS helps protect downstream water quality and the ecological integrity of the region.

The plant discharges into the Ribeira de Iguape River basin, which flows through the Atlantic Forest biome and eventually reaches the Atlantic Ocean near Iguape. This watershed is ecologically sensitive, supporting endangered species and important mangrove ecosystems. Effective wastewater treatment is crucial to prevent nutrient pollution and maintain water quality in this biodiverse region.