ETE Esperanca Londrina - Wastewater Treatment Plant in Londrina, Paraná, Brazil

ETE Esperanca Londrina is a wastewater treatment facility located in Londrina, a city in the state of Paraná, Brazil. The plant serves a population of about 93,000 residents, placing it in the medium-to-large agglomeration category for Brazilian wastewater infrastructure. Brazil's wastewater treatment standards are governed by CONAMA Resolution 430/2011 and the National Water Resources Policy (Law 9.433/1997). Plants serving populations of this scale are typically expected to provide at least secondary treatment to meet effluent quality standards for organic matter and suspended solids. The regulatory framework ensures compliance with discharge limits. The treated effluent from ETE Esperanca Londrina is discharged into local water bodies that are part of the Paraná River basin, one of the most significant river systems in South America. The downstream environment includes the Paraná River, which flows into the Río de la Plata estuary, supporting diverse aquatic ecosystems and providing water for agriculture and urban use.

The plant discharges into the Paraná River basin, which drains into the Río de la Plata estuary. This watershed supports diverse aquatic life, including migratory fish species, and is ecologically sensitive due to agricultural runoff and urban development. The downstream environment relies on adequate treatment to prevent eutrophication and protect biodiversity.