Overview
ETE Ponte do Caixão is a municipal wastewater treatment plant in Piracicaba, São Paulo, Brazil, serving approximately 141,000 people. It discharges into the Piracicaba River basin, a tributary of the Tietê River.
ETE Ponte do Caixão is a municipal wastewater treatment plant located in Piracicaba, within the state of São Paulo, Brazil. The facility serves an estimated population of 141,411, placing it in the large agglomeration category under Brazilian regulatory frameworks. The plant is situated in the Algodoal neighborhood, near the Piracicaba River. As a large-scale plant in Brazil, ETE Ponte do Caixão is subject to federal environmental standards set by CONAMA (National Environmental Council) and state-level regulations from CETESB (São Paulo State Environmental Company). These regulations typically require secondary treatment or higher for plants of this size to protect water quality in receiving bodies. The regulatory framework ensures compliance with discharge limits. The treated effluent from ETE Ponte do Caixão is discharged into the Piracicaba River basin, which flows into the Tietê River, a major waterway in São Paulo state. The Tietê River ultimately drains into the Paraná River basin, which feeds into the Río de la Plata estuary. The Piracicaba River supports diverse aquatic life and is used for recreation, irrigation, and industrial water supply downstream.
Environmental context
The plant discharges into the Piracicaba River, a tributary of the Tietê River, which flows into the Paraná River basin and eventually reaches the Río de la Plata estuary. The Piracicaba River watershed is ecologically sensitive, supporting diverse aquatic species and providing water for agriculture and urban use. Downstream, the Tietê River passes through the São Paulo metropolitan region, where water quality management is critical for public health and ecosystem integrity.
Frequently asked questions
ETE Ponte do Caixão is located in the Algodoal neighborhood of Piracicaba, in the state of São Paulo, Brazil. The address is Avenida Investigador Lucídio Leite, in the Ondas area.
The plant serves approximately 141,411 people, classifying it as a large agglomeration under Brazilian wastewater regulations.
The treated effluent is discharged into the Piracicaba River basin, which flows into the Tietê River and eventually reaches the Paraná River basin and the Río de la Plata estuary.
The plant operates under Brazil's federal CONAMA resolutions and state-level regulations from CETESB in São Paulo. Large agglomerations like this are required to meet secondary treatment standards or higher to protect water quality in receiving bodies.
For plants of this scale in Brazil, secondary treatment is the minimum standard, often involving biological processes such as activated sludge or aerated lagoons. Tertiary treatment may be required if the receiving water body is sensitive or used for water supply.
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