ETE Santo Antonio 1 Wastewater Treatment Plant, Cuiabá, Mato Grosso

ETE Santo Antonio 1 is a wastewater treatment plant located in the Parque Geórgia neighborhood of Cuiabá, Mato Grosso, Brazil. It serves a small population of 372 people, reflecting its role as a local facility within the broader Cuiabá metropolitan region. The plant provides secondary treatment, which is the standard biological treatment stage required for municipal wastewater. In Brazil, secondary treatment aligns with national environmental standards set by CONAMA resolutions, ensuring that effluent meets basic quality criteria before discharge. The plant's discharge volume is recorded at 259.20 units, indicating its operational scale. The treated effluent is released into the local watershed, which ultimately drains into the Cuiabá River, a major tributary of the Paraguay River basin. This basin supports the Pantanal, one of the world's largest tropical wetlands, making proper treatment crucial for downstream ecological health. The plant's secondary treatment helps reduce organic load and protect water quality in this sensitive region.

The plant discharges into the Cuiabá River basin, which flows into the Paraguay River and eventually feeds the Pantanal, a vast floodplain ecosystem of global importance. The Pantanal supports diverse aquatic life, including fish, caimans, and migratory birds, and is highly sensitive to nutrient pollution. Secondary treatment helps mitigate eutrophication risks in this downstream environment.