ETE LAGOA CUBATAO Wastewater Treatment Plant, Cubatão, São Paulo, Brazil

ETE LAGOA CUBATAO serves the municipality of Cubatão in the state of São Paulo, Brazil. The plant is situated in the Baixada Santista metropolitan region, an industrial and port area near the coast. With a population served of around 39,904, it falls into the medium-sized agglomeration category for Brazilian wastewater infrastructure. Brazilian wastewater treatment plants are regulated under federal environmental standards (CONAMA resolutions) and state-level agencies. For plants of this scale, secondary treatment is typically required to reduce organic load and pathogens before discharge. The plant's designed capacity is 1.00 (likely in cubic meters per second or similar unit), indicating a substantial infrastructure investment. The plant's treated effluent ultimately drains into the Cubatão River system, which flows into the Santos Estuary and then the Atlantic Ocean. This region is ecologically sensitive, supporting mangrove ecosystems and estuarine habitats that are critical for fish spawning and migratory birds. Proper treatment is essential to protect these coastal waters from nutrient pollution and industrial contaminants.

The plant discharges into the Cubatão River watershed, which flows into the Santos Estuary and then the Atlantic Ocean. This estuarine system supports diverse aquatic life, including mangroves and fish nurseries, and is an important migratory corridor for birds. The region's industrial activity adds pressure on water quality, making effective wastewater treatment crucial for maintaining ecological balance.