ETE VIVER MELHOR III Wastewater Treatment Plant, Manaus, Amazonas

ETE VIVER MELHOR III is a wastewater treatment plant located in Manaus, the capital of Amazonas state in northern Brazil. The plant serves a small population of 542 residents, reflecting its role in a localized community within the broader urban area of Manaus. The plant provides secondary treatment, which is the standard biological treatment stage required for municipal wastewater. Under Brazil's national environmental regulations (CONAMA resolutions), secondary treatment is typical for communities of this size to reduce organic load and protect water quality. The plant discharges a daily volume of 64.95 m³ of treated effluent. The treated effluent from ETE VIVER MELHOR III enters the local drainage network, which ultimately flows into the Rio Negro, a major tributary of the Amazon River. The Amazon basin is one of the most biodiverse ecosystems on Earth, and proper wastewater treatment is critical to prevent nutrient pollution and safeguard aquatic life in this globally significant watershed.

The plant discharges into the Rio Negro watershed, a blackwater river that flows into the Amazon River, the largest river system in the world by discharge. The Amazon basin supports immense biodiversity, including thousands of fish species and extensive floodplain forests. Even small treatment plants like ETE VIVER MELHOR III play a role in maintaining water quality in this ecologically sensitive region, where nutrient loading can disrupt the natural balance of oligotrophic blackwater ecosystems.