ETE Queiroz Wastewater Treatment Plant, Queiroz, São Paulo, Brazil

ETE Queiroz is a municipal wastewater treatment facility located in Queiroz, a municipality in the state of São Paulo, Brazil. The plant serves a population of around 2,723 residents, classifying it as a small-scale facility. It operates under Brazil's national environmental regulations, which require secondary treatment for urban wastewater to protect water quality and public health. The plant provides secondary treatment, which typically involves biological processes to remove organic matter and suspended solids. The plant's discharge volume is recorded at 353.43 units, indicating consistent operation. Brazilian regulations for small agglomerations mandate adequate treatment to meet effluent standards set by CONAMA resolutions. The treated effluent from ETE Queiroz is discharged into local watercourses that are part of the Paraná River basin, one of South America's largest river systems. This basin supports diverse aquatic ecosystems and provides water for agriculture, industry, and human consumption downstream. Proper treatment at this plant helps reduce nutrient and pollutant loads, contributing to the ecological health of the region's rivers and reservoirs.

The plant discharges into local streams that flow into the Paraná River basin, which ultimately drains into the Río de la Plata estuary. This basin is ecologically significant, supporting diverse fish species and providing critical habitat for migratory birds. The region's agricultural activities make nutrient removal important to prevent eutrophication in downstream water bodies.