ETE PARISI Wastewater Treatment Plant - Perímetro Urbano de Parisi, São Paulo, Brazil

ETE PARISI is a municipal wastewater treatment plant located in Perímetro Urbano de Parisi, within the state of São Paulo, Brazil. The plant serves a population of approximately 1,703 residents, classifying it as a small-scale facility in the region. It is situated near the urban area of Parisi, a locality in the Votuporanga immediate region. The plant provides secondary treatment, which is the standard biological treatment stage required for most municipal wastewater in Brazil. Under Brazilian regulations (CONAMA resolutions and state-level environmental laws), secondary treatment is typically mandated for communities of this size to reduce organic load and suspended solids before discharge. The plant's discharge volume is reported at 247.62 cubic meters per day, indicating consistent operation. 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. The downstream environment includes tributaries feeding the Grande River and eventually the Paraná River, which supports diverse aquatic life and provides water for agriculture and urban use. The plant plays a key role in protecting these water resources from untreated sewage pollution.

The plant's discharge enters local streams that flow into the Turvo River, a tributary of the Grande River, which is part of the upper Paraná River basin. This basin is ecologically significant, supporting diverse fish species and riparian habitats. The region's tropical climate and agricultural land use make nutrient management important to prevent eutrophication downstream. The plant's secondary treatment helps reduce organic pollution, but the proximity to the coast (within 10 km) suggests the watershed may eventually reach coastal ecosystems, though the immediate discharge is inland.