ETE PRINCIPAL Wastewater Treatment Plant, Ubatuba, São Paulo, Brazil

ETE PRINCIPAL is a wastewater treatment plant located in Ubatuba, a coastal city in the state of São Paulo, Brazil. The plant serves a population of about 12,201 residents, making it a medium-sized facility for the region. Ubatuba is situated in the Região Metropolitana do Vale do Paraíba e Litoral Norte, an area known for its Atlantic Forest and coastal ecosystems. As a Brazilian wastewater treatment plant, ETE PRINCIPAL operates under the national regulatory framework established by the Conselho Nacional do Meio Ambiente (CONAMA) and state-level environmental agencies. For agglomerations of this scale, secondary treatment is typically required to meet effluent standards. The plant's designed capacity is 1.00 (likely in cubic meters per second or similar unit), indicating its intended treatment volume. The plant discharges treated effluent into local water bodies that drain into the Atlantic Ocean. Ubatuba's coastal location means the plant's operations are important for protecting nearby beaches and marine habitats. The region's watershed includes rivers flowing from the Serra do Mar mountain range to the coast, supporting diverse aquatic life and mangrove ecosystems.

ETE PRINCIPAL discharges into local rivers that flow into the Atlantic Ocean along the northern coast of São Paulo. The receiving waters are part of the Atlantic Forest biome, which supports high biodiversity including fish, crustaceans, and migratory birds. The coastal zone features mangroves and estuaries that are sensitive to nutrient pollution, making proper wastewater treatment critical for maintaining water quality and ecosystem health.