ETE Hildete Franca - Secondary Wastewater Treatment Plant in Salvador, Bahia

ETE Hildete Franca is a municipal wastewater treatment plant located in the Residencial Hildete Franca Texeira neighborhood of Salvador, Bahia, Brazil. The plant serves a small population of 995 residents within the metropolitan region of Salvador, one of the largest urban areas in northeastern Brazil. The plant provides secondary treatment, which is the standard biological treatment process required for municipal wastewater in Brazil under national regulations. For a facility of this small scale, secondary treatment is appropriate to reduce organic pollutants and suspended solids before discharge. The plant operates under Brazil's environmental licensing framework, which mandates compliance with discharge standards set by the National Environment Council (CONAMA). The treated effluent is discharged into the local drainage system that ultimately reaches the Atlantic Ocean, as Salvador is a coastal city. The receiving waters are part of the Todos os Santos Bay watershed, an ecologically important estuary that supports diverse marine life and mangrove ecosystems. Proper treatment at this plant helps protect coastal water quality and public health.

The plant discharges into the Todos os Santos Bay watershed, which drains into the Atlantic Ocean. This bay is the second largest in Brazil and supports extensive mangrove forests, seagrass beds, and coral reefs. The area is a critical habitat for fish, crustaceans, and migratory birds, making effective wastewater treatment essential to prevent nutrient pollution and protect biodiversity.