ETE Irmã Dulce Wastewater Treatment Plant, Salvador, Bahia

ETE Irmã Dulce is a wastewater treatment plant located in the Vila Irmã Dulce neighborhood of Salvador, the capital city of Bahia state in northeastern Brazil. The plant serves a small population of about 1,236 residents, reflecting its role in a localized community within the larger metropolitan region of Salvador. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. Secondary treatment aligns with Brazil's national wastewater regulations, which require adequate treatment for discharges into sensitive environments. The plant's discharge volume is 133.56 m³/day. Situated within 10 km of the Atlantic coast, the plant's treated effluent likely drains into the Baía de Todos os Santos, a large tropical bay that supports diverse marine life and is an important ecological and economic resource for the region. The bay receives inflows from several rivers and is a key habitat for fish, crustaceans, and migratory birds.

The plant discharges into the Baía de Todos os Santos, one of the largest bays in Brazil, which ultimately connects to the Atlantic Ocean. The bay supports mangrove ecosystems, seagrass beds, and coral reefs, providing critical nursery habitats for marine species. Proper wastewater treatment is essential to prevent nutrient pollution and protect water quality in this ecologically sensitive coastal environment.