ETE Ribeirao Marialva - Wastewater Treatment Plant in Marialva, Paraná, Brazil

ETE Ribeirao Marialva is a wastewater treatment facility located in Marialva, within the state of Paraná, Brazil. The plant serves a population of around 11,160 residents, making it a medium-sized agglomeration under Brazilian regulatory standards. It is situated in the southern region of Brazil, an area characterized by subtropical climate and agricultural activity. As a plant serving a population of this scale, it is expected to comply with Brazilian national regulations for wastewater treatment, which typically require at least secondary treatment to protect water quality. The plant operates under the framework of Brazil's environmental legislation, which mandates effluent standards for discharge into water bodies. The treated effluent from the plant is discharged into local watercourses that ultimately drain into the Paraná River basin, one of the most significant river systems in South America. The Paraná River flows southward through Brazil, Paraguay, and Argentina, eventually reaching the Río de la Plata estuary. The plant plays a role in protecting the water quality of these downstream ecosystems, which support diverse aquatic life and are important for regional water supply.

The plant discharges into the Paraná River basin, which flows through Brazil, Paraguay, and Argentina before reaching the Río de la Plata estuary. This basin supports diverse aquatic ecosystems, including fish species and migratory birds. The region's agricultural runoff and urban wastewater inputs make proper treatment essential to prevent eutrophication and protect downstream water quality.