ETE SISTEMA FAZENDA GRANDE IV - Salvador, Bahia Wastewater Treatment Plant

ETE SISTEMA FAZENDA GRANDE IV is a wastewater treatment facility located in the Fazenda Grande neighborhood of Salvador, the capital city of Bahia state in northeastern Brazil. The plant serves an estimated population of 20,713 residents, placing it in the medium-sized agglomeration category for Brazilian wastewater infrastructure. As a Brazilian wastewater treatment plant, ETE SISTEMA FAZENDA GRANDE IV operates under the national regulatory framework established by the Ministry of Cities and state environmental agencies such as INEMA (Instituto do Meio Ambiente e Recursos Hídricos) in Bahia. Brazilian regulations require secondary treatment for urban wastewater, with discharge standards set by CONAMA Resolution 430/2011. The plant's treated effluent ultimately reaches the Atlantic Ocean via the local drainage network in Salvador's metropolitan region. Salvador is situated on the Bay of All Saints (Baía de Todos os Santos), a large tropical bay that supports diverse marine ecosystems including mangroves, coral reefs, and seagrass beds. The plant's proximity to the coast (within 50 km) underscores the importance of effective treatment to protect coastal water quality and marine biodiversity.

The plant discharges into the Bay of All Saints (Baía de Todos os Santos), the largest bay in Brazil, which receives drainage from multiple rivers including the Paraguaçu and Subaé. The bay supports ecologically sensitive mangrove forests, seagrass meadows, and coral reefs that provide critical habitat for fish, crustaceans, and migratory birds. Effective wastewater treatment is essential to prevent nutrient loading and pathogen contamination that could degrade these coastal ecosystems and impact local fisheries and tourism.