ETE JARDIM ELISA - Secondary Wastewater Treatment Plant in Capivari, São Paulo

ETE JARDIM ELISA is a municipal wastewater treatment plant located in Capivari, within the state of São Paulo, Brazil. It serves a population of approximately 3,008 residents, classifying it as a small-scale facility. The plant is situated in the southeastern region of Brazil, an area characterized by a subtropical climate and significant agricultural and industrial activity. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. Under Brazilian regulations (CONAMA resolutions and state-level environmental agencies), secondary treatment is typically required for inland discharges to protect water quality. Brazilian wastewater treatment plants of this scale are generally subject to permitting by the state environmental agency (CETESB in São Paulo), which sets effluent limits based on the receiving water body's classification. The treated effluent is discharged into a local water body, likely a tributary of the Piracicaba River basin, which ultimately flows into the Tietê River and then to the Paraná River basin. This region is ecologically important for freshwater biodiversity and supports agricultural irrigation downstream. The plant plays a key role in preventing untreated sewage from entering local streams, thereby protecting public health and aquatic ecosystems.

The plant discharges into a local watercourse within the Piracicaba River basin, a tributary of the Tietê River, which flows into the Paraná River system. This watershed supports diverse aquatic life and is used for irrigation and recreation. Downstream, the Tietê River passes through the São Paulo metropolitan area, where water quality is a major concern. The plant's secondary treatment helps reduce organic pollution and nutrient loads, mitigating eutrophication risks in downstream reservoirs and rivers.