ETE Indaiabira Sede - Secondary Wastewater Treatment Plant in Indaiabira, Minas Gerais

ETE Indaiabira Sede is a municipal wastewater treatment plant located in Indaiabira, a municipality in the northern region of Minas Gerais, Brazil. The plant serves a population of 1,863 residents, classifying it as a small-scale facility within the state's sanitation infrastructure. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. For small agglomerations in Brazil, secondary treatment aligns with national regulations under CONAMA resolutions and state environmental standards, ensuring basic pollution control before discharge. The treated effluent is discharged into local watercourses that drain into the São Francisco River basin, one of Brazil's most important river systems. The downstream environment supports diverse aquatic life and provides water for agriculture and communities. Proper treatment helps protect water quality in this semi-arid region.

The plant discharges into tributaries of the São Francisco River, which flows northeast through the semi-arid Sertão region before reaching the Atlantic Ocean. The São Francisco basin is ecologically significant, supporting migratory fish species and providing water for irrigation and human consumption. Secondary treatment reduces organic load and suspended solids, mitigating eutrophication risks in downstream reservoirs and maintaining aquatic habitat quality.