Overview
ETE Rio Pardo Ourinhos serves the city of Ourinhos in São Paulo, Brazil, treating wastewater for approximately 55,365 people. The plant discharges into the Rio Pardo, part of the Paraná River basin.
ETE Rio Pardo Ourinhos is a municipal wastewater treatment plant located in Ourinhos, São Paulo, Brazil. It serves an estimated population of 55,365, placing it in the medium-agglomeration category under Brazilian regulations. The plant is situated in the southeastern region of the country, an area characterized by a subtropical climate and significant agricultural activity. As a Brazilian wastewater facility, ETE Rio Pardo Ourinhos operates under the national environmental framework overseen by the National Water Agency (ANA) and state-level environmental agencies such as CETESB in São Paulo. Brazilian regulations require secondary treatment for urban wastewater, with more stringent standards for sensitive areas. Facilities of this scale typically employ biological treatment systems to meet effluent quality standards. The plant discharges treated effluent into the Rio Pardo, a tributary of the Paranapanema River, which flows into the Paraná River and ultimately reaches the Río de la Plata estuary. The receiving water body supports diverse aquatic life and is used for irrigation and recreation downstream. Proper treatment is essential to protect water quality in this ecologically important basin.
Environmental context
The Rio Pardo, which receives treated effluent from ETE Rio Pardo Ourinhos, flows into the Paranapanema River, a major tributary of the Paraná River. The Paraná River system drains into the Río de la Plata estuary, one of the largest estuarine systems in South America. The watershed supports diverse aquatic ecosystems, including fish species important for regional fisheries. Effective wastewater treatment is critical to prevent nutrient enrichment and maintain water quality in this extensive river network.
Frequently asked questions
ETE Rio Pardo Ourinhos is located in the Jardim Guaporé neighborhood of Ourinhos, in the state of São Paulo, Brazil. The plant is situated on Alameda Lorena, within the Região Imediata de Ourinhos.
The plant serves approximately 55,365 people, classifying it as a medium-sized agglomeration under Brazilian wastewater regulations.
The treated effluent is discharged into the Rio Pardo, a river that flows into the Paranapanema River, part of the larger Paraná River basin.
The plant operates under Brazilian federal and state regulations, including standards set by the National Water Agency (ANA) and the São Paulo state environmental agency CETESB. These regulations mandate secondary treatment and effluent quality monitoring.
For medium-sized agglomerations in Brazil, typical treatment includes secondary biological processes such as activated sludge or stabilization ponds, followed by disinfection. These systems are designed to meet national effluent standards for biochemical oxygen demand and suspended solids.
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