ETE Cidade Nova I - Secondary Wastewater Treatment Plant in Manaus, Amazonas, Brazil

ETE Cidade Nova I is a wastewater treatment plant located in Manaus, the capital of Amazonas state in northern Brazil. The plant serves a small population of 542 residents, providing secondary treatment for municipal wastewater in this urban area of the Amazon region. The plant operates under Brazil's environmental regulatory framework, which includes CONAMA resolutions and state-level licensing requirements. For a facility of this scale, secondary treatment is the expected standard, ensuring organic matter and suspended solids are reduced before discharge. The plant's discharge volume is 64.95 m³/day, reflecting its small service population. The treated effluent is released into the local watershed, which ultimately drains into the Amazon River system. The Amazon basin is one of the world's most biodiverse freshwater ecosystems, supporting vast aquatic life and floodplain forests. Proper wastewater treatment is critical to protect water quality in this ecologically sensitive region.

The plant discharges into the Amazon River basin, the largest river system by discharge volume globally. The downstream environment includes the Negro and Solimões rivers confluence near Manaus, forming the Amazon River. This watershed supports exceptional biodiversity, including fish species, river dolphins, and flooded forests. Maintaining secondary treatment helps reduce nutrient and pathogen loads, protecting aquatic habitats and downstream communities that rely on the river for water supply and livelihoods.