ETE Piraizinho / ETE da Baixada - Wastewater Treatment Plant in Piraí do Sul, Paraná, Brazil

ETE Piraizinho / ETE da Baixada is a wastewater treatment plant located in Piraí do Sul, a municipality in the state of Paraná, Brazil. The plant serves a population of about 12,420 people, placing it in the small-to-medium agglomeration category. It is situated inland, away from coastal areas, and contributes to the local sanitation infrastructure. As a Brazilian wastewater facility, the plant is subject to the National Environmental Council (CONAMA) resolutions and state-level environmental regulations. For agglomerations of this size, secondary treatment is typically required to meet effluent standards. It is expected to comply with the applicable discharge standards set by the environmental agency of Paraná. The treated effluent from the plant is discharged into a local watercourse that eventually drains into the Paraná River basin, one of the major river systems in South America. The downstream environment supports diverse aquatic life and is important for regional water supply and agriculture. Proper treatment helps protect water quality in the receiving waters and downstream ecosystems.

The plant discharges into a tributary of the Paraná River basin, which flows into the Paraná River and ultimately reaches the Río de la Plata estuary. The watershed supports diverse aquatic habitats and is used for irrigation, drinking water, and recreation. Effective wastewater treatment is essential to prevent nutrient enrichment and contamination that could affect downstream communities and ecosystems.