ETE GUARUS Wastewater Treatment Plant, Campos dos Goytacazes, Rio de Janeiro, Brazil

ETE GUARUS is a municipal wastewater treatment plant located in the Parque Vicente Gonçalves Dias neighborhood of Campos dos Goytacazes, in the state of Rio de Janeiro, Brazil. The plant serves an estimated population of 38,556, placing it in the medium-sized agglomeration category for Brazilian wastewater infrastructure. Brazil's wastewater treatment facilities are regulated under the National Environmental Council (CONAMA) resolutions and the National Water Resources Policy. For plants of this scale, secondary treatment is typically required to meet effluent standards for organic matter and suspended solids. The plant's designed capacity is 1.00 cubic meter per second, indicating a substantial infrastructure investment. The treated effluent from ETE GUARUS likely discharges into a local watercourse that flows toward the Paraíba do Sul River, one of the most important rivers in southeastern Brazil. This river ultimately drains into the Atlantic Ocean near Campos dos Goytacazes, supporting diverse aquatic ecosystems and providing water for agriculture and urban use downstream.

The plant is located in the Paraíba do Sul River basin, which drains into the Atlantic Ocean. The river supports a rich diversity of fish species and is a critical water source for the region. Downstream ecosystems include coastal lagoons and mangroves that are ecologically sensitive and important for migratory birds and local fisheries.