ETE Novo Horizonte Wastewater Treatment Plant, Salvador, Bahia

ETE Novo Horizonte is a wastewater treatment plant located in the Jardim das Margaridas neighborhood of Salvador, Bahia, Brazil. It serves a population of about 2,948 people, classifying it as a small-scale facility within the metropolitan region of Salvador, one of Brazil's largest urban centers. The plant provides secondary treatment, which is the standard level required under Brazilian regulations (CONAMA resolutions) for most inland and coastal discharges. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. Located within 10 km of the Atlantic coast, the plant's effluent ultimately reaches the Baía de Todos os Santos, a large tropical bay that supports diverse marine life, including mangroves and coral reefs. The bay is an important ecological and economic resource for the region, hosting fisheries and port activities. Proper treatment is critical to protect water quality and aquatic habitats in this sensitive coastal environment.

The plant's treated effluent flows into the Baía de Todos os Santos, one of Brazil's largest and most biodiverse bays. This estuarine system supports extensive mangrove forests, seagrass beds, and coral reefs, providing nursery habitat for fish and crustaceans. The bay also receives urban runoff from Salvador, making wastewater treatment essential to prevent eutrophication and maintain water quality for recreation and fisheries.