ETE SALTINHO Wastewater Treatment Plant, Saltinho, São Paulo, Brazil

ETE SALTINHO is a municipal wastewater treatment facility located in Saltinho, within the Região Metropolitana de Piracicaba, São Paulo, Brazil. The plant serves a population of approximately 6,056 people, classifying it as a small-scale treatment facility under Brazilian sanitation standards. As a plant serving a small agglomeration, ETE SALTINHO operates under Brazil's national wastewater regulations, which require adequate treatment to protect water quality. Plants of this scale typically employ biological treatment systems such as activated sludge or stabilization ponds to meet discharge standards set by the state environmental agency CETESB. The treated effluent from ETE SALTINHO is discharged into local water bodies that drain into the Piracicaba River basin, a major tributary of the Tietê River. The Piracicaba River supports diverse aquatic life and is used for water supply, recreation, and agriculture downstream. Proper treatment at this plant helps protect the ecological health of the Piracicaba watershed and the larger Tietê-Paraná system.

ETE SALTINHO discharges into local streams that flow into the Piracicaba River, a key tributary of the Tietê River in southeastern Brazil. The Piracicaba River basin supports diverse aquatic ecosystems and provides water for municipal, industrial, and agricultural use. Downstream, the Tietê River flows through the São Paulo metropolitan region before reaching the Paraná River basin, ultimately draining into the Río de la Plata estuary. Effective wastewater treatment at this plant is critical for maintaining water quality in this densely populated and economically important watershed.