ETE PEREIRAS Wastewater Treatment Plant - Pereiras, São Paulo, Brazil

ETE PEREIRAS is a municipal wastewater treatment plant located in Pereiras, a city in the state of São Paulo, Brazil. The plant serves a population of approximately 4,978 people, classifying it as a small agglomeration under Brazilian regulatory frameworks. It is situated inland, away from coastal areas, and operates as part of the regional sanitation infrastructure. The plant provides secondary treatment, which is the standard level required for municipal wastewater in Brazil under CONAMA Resolution 430/2011 and other national regulations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent from ETE PEREIRAS is discharged into local water bodies that ultimately drain into the Paraná River basin, one of the most significant hydrological systems in South America. The downstream environment includes rivers and streams that support diverse aquatic life and are used for water supply, agriculture, and recreation. Proper treatment at this plant helps protect water quality in the region's watershed.

The treated effluent from ETE PEREIRAS flows into local streams within the Paraná River basin, which drains into the Paraná River and eventually the Río de la Plata estuary. This watershed supports a variety of aquatic ecosystems and is important for regional biodiversity. The plant's secondary treatment reduces organic pollutants, helping to maintain water quality in downstream water bodies that are used for drinking water supply and irrigation.