ETE Monteiro Lobato Wastewater Treatment Plant, Monteiro Lobato, São Paulo

ETE Monteiro Lobato is a municipal wastewater treatment plant located in Monteiro Lobato, a city in the state of São Paulo, Brazil. The plant serves a small population of around 1,398 people, reflecting the town's modest scale within the Vale do Paraíba region. The plant provides secondary treatment, which is the standard biological treatment level required for urban wastewater under Brazilian regulations (CONAMA Resolution 430/2011 and state-level norms). The plant discharges approximately 183.21 cubic meters of treated effluent daily. The treated effluent is released into local watercourses that drain into the Paraíba do Sul River basin, a major river system in southeastern Brazil. The Paraíba do Sul River flows through the states of São Paulo, Rio de Janeiro, and Minas Gerais, eventually reaching the Atlantic Ocean near Campos dos Goytacazes. The plant's operation helps protect downstream water quality and aquatic ecosystems in this important basin.

The plant discharges into the Paraíba do Sul River basin, which flows through the densely populated Vale do Paraíba region. The river supports diverse aquatic life and provides water for millions of people downstream. The basin ultimately drains into the Atlantic Ocean, making effective wastewater treatment critical for coastal water quality and marine ecosystems.