ETE VALE DO SOL I - Secondary Wastewater Treatment Plant in Piracicaba, São Paulo

ETE VALE DO SOL I is a wastewater treatment plant located in the Vale do Sol neighborhood of Piracicaba, in the state of São Paulo, Brazil. The plant serves a small population of around 1,234 residents, reflecting its role in local sanitation infrastructure. The plant provides secondary treatment, which is the standard level required for municipal wastewater in Brazil under national regulations. With a discharge volume of 276.00, the plant operates within the framework of Brazil's environmental licensing system, overseen by state agencies such as CETESB in São Paulo. The treated effluent is discharged into local water bodies that eventually drain into the Piracicaba River, a key tributary of the Tietê River basin. This river system supports diverse aquatic life and is important for regional water supply and agriculture downstream.

The plant's discharge enters the Piracicaba River watershed, which flows into the Tietê River and ultimately reaches the Paraná River basin. This river network supports a variety of fish species and provides water for irrigation and drinking water for downstream communities. The region's subtropical climate and agricultural activity make proper wastewater treatment essential to prevent nutrient pollution and protect aquatic ecosystems.