ETE Eldorado Wastewater Treatment Plant, Campinas, São Paulo

ETE Eldorado is a wastewater treatment facility located in Campinas, within the state of São Paulo, Brazil. The plant serves a small community of 2,237 residents, reflecting its role in local sanitation infrastructure. It operates under Brazil's national environmental regulations, which set standards for effluent quality and water resource protection. The plant provides secondary treatment, a standard level that typically involves biological processes to remove organic matter and suspended solids. For a facility of this scale, secondary treatment is appropriate and aligns with common practices for small agglomerations in Brazil. The plant discharges a daily volume of 308.73 cubic meters of treated wastewater. The treated effluent from ETE Eldorado is released into local water bodies that are part of the broader Paraná River basin, one of South America's major river systems. This basin supports diverse aquatic ecosystems and provides water for agriculture, industry, and human consumption. Proper treatment at this plant helps protect downstream water quality and ecological health.

The treated effluent from ETE Eldorado flows into local streams that eventually reach the Paraná River basin, which drains into the Río de la Plata estuary. This watershed supports important aquatic habitats and is vital for regional water supply. The plant's secondary treatment reduces organic pollutants, helping to maintain water quality in the receiving water bodies and minimize impacts on downstream ecosystems.