ETE Piedade Mirassol - Wastewater Treatment Plant in Mirassol, São Paulo, Brazil

ETE Piedade Mirassol is a wastewater treatment plant located in Mirassol, within the state of São Paulo, Brazil. Serving an estimated population of 31,709, it falls into the medium-agglomeration category typical of inland cities in the Southeast region. The plant is situated in the Loteamento de Chacaras Recanto de Alá area, reflecting the urban expansion of Mirassol. The plant operates under Brazil's national wastewater regulations, which require secondary treatment for urban agglomerations of this scale. The designed capacity is reported as 1.00 (likely in a unit such as cubic meters per second or similar), indicating the infrastructure is sized to handle the local wastewater load. Brazilian environmental agencies, such as CETESB in São Paulo, oversee compliance with discharge standards. The treated effluent from ETE Piedade Mirassol is discharged into local water bodies that ultimately drain into the Rio Preto basin, part of the larger Paraná River system. This river network flows into the Río de la Plata estuary, supporting diverse aquatic ecosystems and agricultural water use downstream. The plant plays a key role in protecting water quality in the region's freshwater resources.

The plant discharges into the Rio Preto watershed, which flows into the Grande River and eventually the Paraná River, one of South America's major river systems. This basin supports diverse aquatic life and provides water for irrigation and drinking downstream. Protecting water quality here is critical for maintaining ecological balance in the Paraná River basin and the Río de la Plata estuary.