ETE Santa Brigida Wastewater Treatment Plant, Santa Brigida, Bahia, Brazil

ETE Santa Brigida is a municipal wastewater treatment facility located in Santa Brigida, a municipality in the state of Bahia, Brazil. Serving a population of around 4,226, the plant provides secondary treatment to domestic wastewater, which is a standard level for communities of this size in Brazil. The plant is situated inland, far from the coast, and operates under Brazil's national environmental regulations, which require adequate treatment to protect water quality. The plant's treatment process achieves secondary-level purification, reducing organic matter and suspended solids before discharge. The plant's discharge volume is reported at 278.27 units, indicating consistent operation. In Brazil, wastewater treatment plants are regulated by federal and state environmental agencies, and facilities of this scale typically follow standards set by CONAMA resolutions to ensure compliance with water quality criteria. The treated effluent from ETE Santa Brigida is discharged into local water bodies that drain into the Sao Francisco River basin, one of Brazil's most important river systems. The Sao Francisco River flows northward through the semi-arid region, supporting agriculture, hydropower, and biodiversity. The plant's operation helps protect downstream water quality and aquatic ecosystems in this ecologically sensitive area.

The plant discharges into local streams that are part of the Sao Francisco River basin, which drains into the Atlantic Ocean. The Sao Francisco River is a critical water source for the semi-arid Nordeste region, supporting diverse aquatic life and migratory fish species. The plant's secondary treatment helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream reservoirs and the river's lower reaches.