ETE LUIZIANIA Wastewater Treatment Plant, Luiziânia, São Paulo, Brazil

ETE LUIZIANIA is a municipal wastewater treatment plant located in Luiziânia, within the state of São Paulo, Brazil. The plant serves a population of approximately 4,549 people, placing it in the small agglomeration category under Brazilian regulatory frameworks. It is situated in the southeastern region of the country, an area characterized by agricultural activity and inland water systems. The plant operates at a secondary treatment level, which is the minimum standard required by Brazilian environmental regulations (CONAMA resolutions) for inland discharge. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's discharge volume is recorded at 565.43 units, indicating consistent operation within its designed capacity. The treated effluent is discharged into local water bodies that ultimately drain into the Paraná River basin, one of South America's major river systems. This basin supports diverse aquatic ecosystems and is crucial for regional water supply and agriculture. The plant's secondary treatment helps protect downstream water quality, particularly in the context of Brazil's growing emphasis on wastewater management under the National Water Resources Policy.

The plant's discharge enters local streams that flow into the Tietê River, a major tributary of the Paraná River basin. This basin drains into the Río de la Plata estuary, supporting ecologically sensitive wetlands and floodplains. The region's agricultural runoff and urban discharges make secondary treatment essential for maintaining water quality and aquatic biodiversity.