ETE Porto Alegre Engenho Velho - Secondary Wastewater Treatment in Capivari, São Paulo

ETE Porto Alegre Engenho Velho is a municipal wastewater treatment plant located in Capivari, within the state of São Paulo, Brazil. The plant serves a population of approximately 7,376 people, classifying it as a small to medium-sized facility in the region. It operates under Brazil's national environmental regulations, which require secondary treatment for urban wastewater to reduce organic pollutants and protect water quality. The plant provides secondary treatment, a standard biological process that removes biodegradable organic matter and suspended solids. The plant's discharge volume of 902.26 thousand cubic meters per year indicates its operational scale. Brazilian wastewater facilities are regulated by federal agencies such as CONAMA and state environmental bodies, with permits that set effluent limits based on receiving water body sensitivity. The treated effluent is discharged into local water bodies that ultimately drain into the Piracicaba River basin, part of the larger Paraná River system. This region supports diverse aquatic life and is important for agricultural and urban water supply. The plant's operation helps reduce nutrient and organic loading, contributing to the ecological health of downstream rivers and reservoirs.

The plant discharges into the Piracicaba River basin, which flows into the Tietê River and eventually the Paraná River, one of South America's major river systems. This watershed supports diverse aquatic ecosystems and provides water for irrigation, industry, and drinking water for millions. The region faces pressures from agricultural runoff and urbanization, making effective wastewater treatment critical for maintaining water quality and preventing eutrophication in downstream reservoirs.