ETE Sao Pedro Wastewater Treatment Plant, Sao Pedro da Aldeia, Rio de Janeiro

ETE Sao Pedro is a wastewater treatment plant located in Sao Pedro da Aldeia, within the state of Rio de Janeiro, Brazil. It serves a population of around 62,432 residents, placing it in the medium-sized agglomeration category for the region. The plant is situated near the coast, within 50 km of the Atlantic Ocean, and its operations are part of the municipal infrastructure managed by local authorities. As a Brazilian wastewater facility, ETE Sao Pedro is subject to national environmental standards, including CONAMA resolutions and state-level regulations from Rio de Janeiro. For a plant serving over 60,000 people, secondary treatment is typically required to reduce organic pollutants and suspended solids. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via coastal lagoons and rivers in the Regiao dos Lagos region. This area supports diverse aquatic life and is important for local fisheries and tourism. Proper treatment helps protect downstream water quality and marine ecosystems.

The plant discharges into the coastal watershed of the Regiao dos Lagos, which flows through lagoons such as Lagoa de Araruama before reaching the Atlantic Ocean. This region is ecologically sensitive, supporting mangroves, wetlands, and diverse marine life. Effective wastewater treatment is crucial to prevent nutrient pollution and protect the health of these coastal ecosystems.