ETE SITIO COLINA Wastewater Treatment Plant, Colina, São Paulo

ETE SITIO COLINA is a wastewater treatment plant located in Colina, a municipality in the state of São Paulo, Brazil. The plant serves a population of approximately 2,522 people, classifying it as a small-scale facility within the region's sanitation infrastructure. The plant provides secondary treatment, which is the standard level required by Brazilian regulations for urban wastewater. Secondary treatment typically involves biological processes to remove organic matter and suspended solids, ensuring the effluent meets basic quality standards before discharge. The plant reports a discharge volume of 366.26 thousand cubic meters per year. The treated effluent is discharged into local water bodies, contributing to the protection of the Rio Grande basin, which is part of the broader Paraná River system. This region is ecologically important, supporting diverse aquatic life and agricultural activities downstream. Proper treatment helps maintain water quality and ecosystem health in the watershed.

The plant discharges into the Rio Grande basin, a tributary of the Paraná River, which flows into the Río de la Plata estuary. The watershed supports agricultural irrigation and provides habitat for fish species such as the dourado and pacu. Secondary treatment reduces organic pollution, helping to prevent eutrophication and protect downstream aquatic ecosystems.