ETE SAO JOAO DO PAU D ALHO - Secondary Wastewater Treatment Plant in São João do Pau d'Alho, São Paulo

ETE SAO JOAO DO PAU D ALHO is a municipal wastewater treatment plant located in São João do Pau d'Alho, a small town in the state of São Paulo, Brazil. The plant provides secondary treatment for the local community, serving a population of approximately 1,707 residents. It is situated in the interior of São Paulo, far from the coast but within 50 km of the coast, reflecting the region's inland geography. As a secondary treatment facility, the plant meets the standard level of treatment required for municipal wastewater in Brazil under the National Environmental Council (CONAMA) regulations. For small agglomerations like this, secondary treatment is typically sufficient to reduce organic pollutants and suspended solids before discharge. The plant's discharge volume is recorded at 111.58 units, indicating consistent operation. The treated effluent from the plant is discharged into a local water body, which ultimately drains into the Paraná River basin, one of the major river systems in South America. This basin supports diverse aquatic life and provides water for agriculture and human consumption. The plant plays a key role in protecting downstream water quality in this ecologically important region.

The plant discharges into a tributary of the Paraná River basin, which flows through southeastern Brazil and eventually reaches the Río de la Plata estuary. This watershed supports diverse aquatic ecosystems, including fish species and riparian vegetation. The region's climate is tropical with a dry season, and the river system is vital for local agriculture and water supply. Effective wastewater treatment helps prevent nutrient pollution and maintains the ecological health of the downstream water bodies.