ETE Cruz Machado - Secondary Wastewater Treatment Plant in Cruz Machado, Paraná

ETE Cruz Machado is a municipal wastewater treatment plant located in Cruz Machado, a municipality in the state of Paraná, Brazil. The plant serves a small population of 470 residents, reflecting the rural character of the region. It is situated in the southern part of Brazil, within the Iguaçu River basin. The plant provides secondary treatment, which is the standard biological process required under Brazilian regulations (CONAMA resolutions) for communities of this size. Secondary treatment typically involves biological degradation of organic matter, reducing biochemical oxygen demand and suspended solids before discharge. The plant handles an average daily flow of 33.70 cubic meters, consistent with the small population served. The treated effluent is discharged into local streams that eventually flow into the Iguaçu River, a major watercourse in southern Brazil. The Iguaçu River drains into the Paraná River, which forms part of the La Plata Basin, ultimately reaching the Atlantic Ocean. The plant's operation helps protect downstream water quality and aquatic ecosystems in this ecologically diverse region.

The plant discharges into small tributaries of the Iguaçu River, which flows through the Atlantic Forest biome, a biodiversity hotspot. The Iguaçu River supports diverse aquatic life and is important for regional water supply. Downstream, the river joins the Paraná River, contributing to the La Plata Basin, one of South America's largest drainage systems. Proper treatment at ETE Cruz Machado helps prevent nutrient and organic pollution in these sensitive freshwater ecosystems.