ETE IBIRA Wastewater Treatment Plant, Ibirá, São Paulo, Brazil

ETE IBIRA is a municipal wastewater treatment plant located in Ibirá, in the state of São Paulo, Brazil. It serves a population of around 9,644 residents, placing it in the small-to-medium agglomeration category for Brazilian wastewater infrastructure. Brazil's wastewater treatment facilities are regulated under federal standards such as CONAMA Resolution 430/2011, which sets effluent discharge limits. For plants serving communities of this size, secondary treatment is typically required to reduce organic load and suspended solids before discharge into receiving waters. The plant's treated effluent is discharged into local water bodies that drain into the Turvo River basin, part of the larger Paraná River system. This watershed supports agricultural activities and provides water for downstream communities, making effective treatment essential for protecting water quality and aquatic ecosystems.

The plant discharges into local streams that flow into the Turvo River, a tributary of the Paraná River basin. This region is part of the Brazilian Southeast, characterized by tropical climate and intensive agriculture. The receiving waters support diverse aquatic life and are used for irrigation and recreation downstream. Proper treatment helps prevent eutrophication and protects the ecological health of the Turvo River and ultimately the Paraná River system.