ETE PRIMEIRO DE MAIO Wastewater Treatment Plant, Primeiro de Maio, Paraná, Brazil

ETE PRIMEIRO DE MAIO is a municipal wastewater treatment facility located in Primeiro de Maio, a city in the state of Paraná, Brazil. The plant serves a population of approximately 2,559 residents, placing it in the small agglomeration category. It operates under Brazil's national environmental regulations, which mandate secondary treatment for urban wastewater to protect water quality. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. Secondary treatment is typical for plants of this scale in Brazil. The facility discharges 237.60 cubic meters of treated wastewater per day, reflecting its capacity to handle the local community's sewage load. The treated effluent is released into a local watercourse that ultimately drains into the Paraná River basin, one of South America's major river systems. This basin supports diverse aquatic ecosystems and is vital for regional water supply. The plant's operation helps reduce nutrient and pathogen loads, protecting downstream water quality and ecological health.

The plant discharges into a tributary of the Paraná River basin, which flows through southern Brazil and into the Río de la Plata estuary. This watershed supports diverse aquatic life, including migratory fish species, and provides water for agriculture and urban use. Proper treatment at this plant helps prevent eutrophication and contamination in downstream ecosystems.