ETE Morada do Ouro Wastewater Treatment Plant, Cuiabá, Mato Grosso, Brazil

ETE Morada do Ouro is a wastewater treatment plant located in the Morada da Serra neighborhood of Cuiabá, the capital of Mato Grosso state in central-western Brazil. The plant serves a population of approximately 3,154 residents, classifying it as a small-scale facility within the metropolitan region of Cuiabá. Brazil's wastewater treatment standards are governed by CONAMA Resolution 430/2011 and the National Basic Sanitation Plan (PLANSAB). For small agglomerations like this, secondary treatment is typically required to meet effluent quality standards before discharge. It is expected to comply with federal and state environmental regulations. The plant discharges treated wastewater into the Cuiabá River basin, which flows into the Paraguay River and eventually the Paraná River system, draining into the Río de la Plata estuary. The Cuiabá River is ecologically significant, supporting diverse aquatic life and providing water for local communities and agriculture. Proper treatment at this plant helps protect downstream water quality and ecosystem health.

The plant is located in the Cuiabá River watershed, part of the larger Paraguay River basin. The Cuiabá River flows through the Pantanal, one of the world's largest tropical wetlands, which supports rich biodiversity including fish, birds, and mammals. Treated effluent from the plant ultimately reaches the Paraguay River and then the Paraná River, which empties into the Río de la Plata. Protecting water quality in this basin is critical for maintaining the ecological integrity of the Pantanal and downstream aquatic habitats.