ETE MONTES CLAROS Wastewater Treatment Plant, Montes Claros, Minas Gerais, Brazil

ETE MONTES CLAROS is a municipal wastewater treatment plant located in the Jardim Niemeyer district of the industrial area of Montes Claros, in the state of Minas Gerais, Brazil. The plant serves a population of approximately 359,586, placing it in the large agglomeration category under Brazilian regulatory frameworks. Brazil's wastewater treatment standards are governed by CONAMA Resolution 430/2011 and state-level regulations, which require secondary treatment for large urban centers. Plants of this scale typically employ biological treatment systems such as activated sludge or aerated lagoons to meet effluent quality standards. The plant's treated effluent is discharged into local watercourses that drain into the São Francisco River basin, one of Brazil's most important river systems. The São Francisco River flows northward through the semi-arid sertão region and ultimately reaches the Atlantic Ocean. The downstream environment supports diverse aquatic life and provides water for agriculture, industry, and human consumption in a region characterized by seasonal drought.

The plant discharges into tributaries of the São Francisco River, which flows through the semi-arid Caatinga biome before reaching the Atlantic Ocean. The river is a critical water source for irrigation, hydropower, and municipal supply in northeastern Brazil. Downstream ecosystems include riparian forests and wetlands that support fish, migratory birds, and endemic species. Proper treatment is essential to prevent nutrient loading and maintain water quality in this water-stressed region.