ETE Ceu Azul Wastewater Treatment Plant, Céu Azul, Paraná, Brazil

ETE Ceu Azul is a municipal wastewater treatment plant located in Céu Azul, a city in the state of Paraná, Brazil. The plant serves a population of about 6,212 people, providing secondary treatment to domestic wastewater. It operates as part of the regional sanitation infrastructure in the Cascavel immediate geographic region. The plant applies secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids. Secondary treatment is the standard for municipal plants in Brazil under national regulations. The plant's discharge volume is approximately 813.89 m³/day, indicating its capacity to handle the local wastewater load. The treated effluent is discharged into a local watercourse, contributing to the Paraná River basin. This region is part of the Atlantic Forest biome, which supports diverse aquatic life and requires careful management of water quality. The plant plays a key role in protecting downstream water resources and public health in the area.

The plant discharges into a tributary of the Paraná River basin, which flows through the Atlantic Forest biome and ultimately reaches the Río de la Plata estuary. This watershed supports diverse aquatic ecosystems, including fish species and riparian vegetation. Proper treatment helps prevent nutrient pollution and maintains water quality for downstream communities and ecological balance.