ETE Samambaia Paranagua - Secondary Wastewater Treatment Plant in Paranaguá, Paraná, Brazil

ETE Samambaia Paranagua is a municipal wastewater treatment plant located in Paranaguá, a coastal city in the state of Paraná, Brazil. The plant serves a population of approximately 4,062 residents, classifying it as a small-scale facility within the region's sanitation infrastructure. The plant provides secondary treatment, which is the standard biological process required for most urban wastewater in Brazil under national regulations. The plant operates under Brazil's environmental licensing framework, which mandates compliance with discharge standards set by the National Environment Council (CONAMA). Treated effluent from the plant is discharged into local water bodies that ultimately drain into the Atlantic Ocean. The coastal location places the plant in a sensitive ecological zone, where nutrient and pathogen control are critical to protect nearby mangroves, estuaries, and marine biodiversity. The plant's performance directly influences water quality in the Paranaguá Estuarine Complex, a vital ecosystem for fisheries and tourism.

The plant discharges into the Paranaguá Estuarine Complex, a large coastal system that connects to the Atlantic Ocean. This estuary supports diverse aquatic life, including mangroves, fish, and crustaceans, and serves as a nursery for many marine species. The proximity to the coast (within 10 km) means that any nutrient or pathogen loads from the plant can directly impact coastal water quality and marine habitats. Effective secondary treatment is essential to minimize eutrophication risks and protect the ecological integrity of the estuary and adjacent coastal waters.