ETE SAO FRANCISCO DE ASSIS - Secondary Wastewater Treatment Plant in São Francisco de Assis, Rio Grande do Sul

ETE SAO FRANCISCO DE ASSIS is a municipal wastewater treatment plant located in São Francisco de Assis, a city in the state of Rio Grande do Sul, Brazil. The plant serves a population of approximately 1,310 residents, classifying it as a small-scale facility within the region's sanitation infrastructure. The plant provides secondary treatment, which is the standard level required under Brazilian regulations (CONAMA resolutions) for most inland communities. This process typically involves biological treatment to reduce organic matter and suspended solids before discharge. The plant's daily discharge volume is 103.68 m³, reflecting the modest scale of the community it serves. The treated effluent is discharged into local water bodies that ultimately drain into the Uruguay River basin, a major hydrological system in southern Brazil. The Uruguay River flows southward, forming part of the border between Brazil and Argentina, and eventually empties into the Rio de la Plata estuary. The plant's operation helps protect downstream aquatic ecosystems and water quality in this important transboundary basin.

The plant discharges into local streams that are part of the Uruguay River basin. The Uruguay River flows through the Pampa biome, supporting diverse aquatic life and providing water for agriculture and communities downstream. The river eventually joins the Paraná River to form the Rio de la Plata estuary, a large and ecologically productive coastal system. Proper wastewater treatment is essential to prevent nutrient pollution and maintain water quality in this sensitive watershed.