ETE Dolcinópolis Wastewater Treatment Plant, Dolcinópolis, São Paulo

ETE Dolcinópolis is a wastewater treatment plant located in Dolcinópolis, a municipality in the state of São Paulo, Brazil. The plant serves a small population of around 2,023 residents, reflecting its role in a rural or small-town setting. It is situated inland, more than 10 kilometers from the coast, and operates under Brazil's national environmental regulations. The plant provides secondary treatment, which is the standard biological treatment process required for most municipal wastewater in Brazil. This level of treatment typically involves biological degradation of organic matter, followed by sedimentation, ensuring that the effluent meets basic quality standards before discharge. The plant's daily discharge volume is 276.84 cubic meters, indicating a modest scale consistent with the small population served. The treated effluent is discharged into a local watercourse, which eventually drains into the Paraná River basin, one of the major river systems in South America. This basin supports diverse aquatic ecosystems and is important for regional water supply and agriculture. The plant's operation helps protect downstream water quality in the Paraná basin, contributing to the ecological health of the region.

The treated effluent from ETE Dolcinópolis is discharged into a local stream that flows into the Paraná River basin, which ultimately drains into the Río de la Plata estuary. The Paraná basin is a vast and ecologically significant system, supporting diverse fish species, wetlands, and riparian habitats. The plant's secondary treatment helps reduce organic pollution and nutrient loading, protecting downstream water quality and aquatic life in this important watershed.