ETE PONTA DE N SENHORA - Secondary Wastewater Treatment on Ilha dos Frades, Salvador

ETE PONTA DE N SENHORA is a municipal wastewater treatment plant located on Ilha dos Frades (Ilha de Santo Antônio) in the city of Salvador, Bahia, Brazil. The plant serves a small population of 578 residents on the island, providing secondary treatment for domestic wastewater. As part of Salvador's broader sanitation infrastructure, it addresses the needs of a remote coastal community. The plant operates at secondary treatment level, which is appropriate for its small scale. Under Brazilian regulations (CONAMA resolutions and the National Basic Sanitation Plan), secondary treatment is standard for municipal wastewater to reduce organic load and pathogens. Given the island location, treatment is critical to protect local water quality. The treated effluent is discharged into the waters surrounding Ilha dos Frades, which are part of Todos os Santos Bay, the largest navigable bay in Brazil. The bay supports diverse marine life, including mangroves and coral reefs, and is an important fishing and tourism resource. The plant's operation helps prevent untreated sewage from entering this ecologically sensitive coastal environment.

The plant discharges into Todos os Santos Bay, a large tropical bay that receives drainage from several rivers and supports extensive mangrove forests, seagrass beds, and coral reefs. The bay is a critical habitat for fish, crustaceans, and migratory birds. As a coastal island facility, the plant's secondary treatment reduces organic pollution and pathogen loads, helping to maintain water quality for recreation and fisheries in the bay.