ETE CASSIA DOS COQUEIROS - Secondary Wastewater Treatment in Cássia dos Coqueiros, São Paulo

ETE CASSIA DOS COQUEIROS is a municipal wastewater treatment plant located in Cássia dos Coqueiros, a small city in the state of São Paulo, Brazil. The plant serves a population of approximately 1,585 residents, reflecting its role in managing wastewater for a small agglomeration in the southeastern region of the country. The plant provides secondary treatment, which is the standard level required under Brazilian regulations for communities of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant discharges an average of 230.09 m³ of treated wastewater per day. The treated effluent is released into local water bodies that drain into the broader Paraná River basin, a major hydrological system in South America. The plant's operation helps protect downstream water quality and supports the ecological health of the region's rivers and streams.

The plant discharges into local streams that flow into the Pardo River, a tributary of the Grande River, which eventually joins the Paraná River. The Paraná River basin is one of the most important in South America, supporting diverse aquatic ecosystems and providing water for agriculture, industry, and human consumption. The secondary treatment provided by the plant helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream water bodies.