ETE Moreira Cesar Wastewater Treatment Plant, Pindamonhangaba, São Paulo

ETE Moreira Cesar is a wastewater treatment plant located in the Moreira Cesar district of Pindamonhangaba, in the state of São Paulo, Brazil. The plant serves a population of around 45,000 residents, placing it in the medium agglomeration category for Brazilian wastewater infrastructure. As a Brazilian treatment facility, ETE Moreira Cesar is subject to CONAMA Resolution 430/2011 and state-level environmental standards set by CETESB, which mandate appropriate treatment levels for discharge into water bodies. For plants of this scale, secondary treatment is typically required to reduce organic load and suspended solids before effluent release. The plant's treated effluent is discharged into local watercourses that drain into the Paraíba do Sul River basin, a major river system in southeastern Brazil. The Paraíba do Sul flows through the Vale do Paraíba region and ultimately reaches the Atlantic Ocean near Campos dos Goytacazes. This river supports diverse aquatic life and provides water for agriculture, industry, and drinking water for millions of people downstream.

The plant discharges into the Paraíba do Sul River basin, which flows through the Vale do Paraíba region and empties into the Atlantic Ocean. The river supports a variety of fish species and is an important water source for downstream communities. The watershed is ecologically sensitive due to agricultural runoff and urban development, making proper wastewater treatment essential for maintaining water quality and aquatic habitat.