ETE Emissario Tupi Wastewater Treatment Plant, Cubatão, São Paulo, Brazil

ETE Emissario Tupi is a wastewater treatment plant located in Cubatão, within the Baixada Santista metropolitan region of São Paulo, Brazil. The plant serves a population of approximately 104,295 people, placing it in the medium-to-large agglomeration category. It operates under Brazil's national environmental regulations, which require appropriate treatment levels for discharges into sensitive coastal areas. As a plant serving over 100,000 inhabitants, ETE Emissario Tupi is expected to meet secondary treatment standards under Brazilian law (CONAMA resolutions). The designed capacity is reported as 1. The plant's location in an industrialized region near the port of Santos underscores the importance of effective wastewater management to protect both public health and the environment. The treated effluent from ETE Emissario Tupi ultimately discharges into the estuarine system of the Baixada Santista, which drains into the Atlantic Ocean. This coastal ecosystem supports mangroves, fish nurseries, and migratory bird populations. The region's high industrial activity and urban density make proper treatment critical to prevent eutrophication and contamination of marine resources.

The plant discharges into the estuarine complex of Baixada Santista, which flows into the Atlantic Ocean. This coastal zone supports diverse aquatic life, including mangroves and fish spawning grounds. The region's proximity to the Serra do Mar mountain range and heavy industrial activity heightens the need for effective treatment to protect downstream marine ecosystems from nutrient loading and toxic pollutants.