ETE CEREJEIRAS Wastewater Treatment Plant, Atibaia, São Paulo, Brazil

ETE CEREJEIRAS is a wastewater treatment plant located in the Nova Atibaia neighborhood of Atibaia, in the state of São Paulo, Brazil. It serves a population of 2,314 people, classifying it as a small-scale municipal facility within the broader Atibaia urban area. The plant provides secondary treatment, which is the standard level required under Brazilian regulations (CONAMA resolutions) for most inland communities. This process typically involves biological treatment to reduce organic matter and suspended solids before discharge. The plant handles an average daily flow of 793.15 m³ of wastewater. Treated effluent from ETE CEREJEIRAS is discharged into local streams that eventually flow into the Atibaia River, a tributary of the Piracicaba River, which is part of the Paraná River basin. This watershed supports diverse aquatic life and provides water for downstream communities, making proper treatment essential for protecting water quality and ecosystem health.

The plant's discharge enters small watercourses in the Atibaia region, which drain into the Atibaia River, a key tributary of the Piracicaba River. The Piracicaba River flows into the Paraná River basin, one of South America's major river systems. This watershed supports diverse aquatic ecosystems and provides drinking water for millions of people. The secondary treatment helps reduce nutrient and organic pollution, protecting downstream water quality and aquatic habitats.