ETE Eldorado II - Secondary Wastewater Treatment Plant in Eldorado, Mato Grosso do Sul

ETE Eldorado II is a municipal wastewater treatment plant located in Eldorado, Mato Grosso do Sul, Brazil. The plant serves a small population of 1,165 residents, providing secondary treatment to reduce organic pollutants and suspended solids before discharge. It is situated in the Centro-Oeste region, near the border with Paraguay, and operates under Brazil's national environmental regulations. The plant employs secondary treatment, which typically involves biological processes such as activated sludge or trickling filters to break down organic matter. The plant's scale aligns with small agglomerations that are subject to Brazilian Resolution CONAMA 430/2011, which sets effluent quality standards for wastewater discharges. The plant's discharge volume is recorded at 158.25 cubic meters per day. Treated effluent from ETE Eldorado II is released into local water bodies that drain into the Paraná River basin, one of South America's major river systems. The Paraná River flows southward through Brazil, Paraguay, and Argentina, eventually reaching the Río de la Plata estuary. The plant's operations help protect downstream aquatic ecosystems, including the Upper Paraná River floodplain, which supports diverse fish and bird species.

The plant discharges into local streams that are part of the Paraná River basin, which flows through Brazil, Paraguay, and Argentina before emptying into the Río de la Plata estuary. This watershed supports ecologically sensitive areas, including the Upper Paraná River floodplain, which provides critical habitat for migratory fish and aquatic birds. The region's tropical climate and agricultural land use make effective wastewater treatment essential to prevent nutrient pollution and maintain water quality in downstream ecosystems.