ETE Macaé - Secondary Wastewater Treatment Plant in Macaé, Rio de Janeiro, Brazil

ETE Macaé is a municipal wastewater treatment plant located in Macaé, a city in the state of Rio de Janeiro, Brazil. The plant serves a population of approximately 4,241 people, placing it in the small agglomeration category. It is situated in the Região Sudeste region, near the Atlantic coast. The plant provides secondary treatment, which is the minimum standard required under Brazilian regulations (CONAMA 430/2011) for most inland and coastal discharges. The plant treats an average daily flow of 520.23 m³/day. As a coastal facility, it must comply with additional environmental standards to protect marine water quality. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean. The coastal environment near Macaé supports diverse marine life and is important for local fisheries and tourism. The plant plays a key role in reducing pollution loads to the coastal zone.

The plant discharges into the Macaé River basin, which flows into the Atlantic Ocean near the city of Macaé. The coastal waters in this region are part of a productive marine ecosystem that supports fish, crustaceans, and seabirds. The area is also influenced by offshore oil and gas activities, making pollution control critical for maintaining water quality and ecological balance.