ETE IBIUNA Wastewater Treatment Plant, Ibiúna, São Paulo, Brazil

ETE IBIUNA is a wastewater treatment plant located in Ibiúna, a city in the state of São Paulo, Brazil. The plant serves a population of about 9,400 people within the Sorocaba metropolitan region. As a municipal facility, it plays a key role in managing wastewater for this community. Brazil's wastewater treatment standards are governed by national regulations, including CONAMA resolutions and state-level environmental agencies. For a plant serving a population of this size, secondary treatment is typically required to meet effluent quality standards. The plant operates under the oversight of the São Paulo state environmental authority, CETESB, which issues operating permits and monitors compliance. The treated effluent from ETE IBIUNA is discharged into a local watercourse that flows into the Sorocaba River basin, part of the larger Paraná River system. This watershed supports diverse aquatic life and provides water for downstream communities. Proper treatment helps protect water quality in the region's rivers and reservoirs.

The plant discharges into a tributary of the Sorocaba River, which flows into the Tietê River and ultimately reaches the Paraná River basin. This watershed is ecologically important, supporting fish populations and providing water for agriculture and urban use. The region's subtropical climate and seasonal rainfall patterns influence runoff and dilution capacity, making consistent treatment essential for maintaining downstream water quality.