ETE Corumbatai Wastewater Treatment Plant, Corumbatai, Sao Paulo, Brazil

ETE Corumbatai is a municipal wastewater treatment plant located in Corumbatai, a city in the state of Sao Paulo, Brazil. The plant serves a population of 2,104, classifying it as a small-scale facility within the region's sanitation infrastructure. It is situated inland, away from coastal areas, and its operations are part of the broader water management system in the Piracicaba River basin. The plant provides secondary treatment, which is the standard level required for small agglomerations under Brazil's environmental regulations, specifically CONAMA resolutions and state-level permits issued by CETESB in Sao Paulo. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent from ETE Corumbatai ultimately enters the local watershed, which drains into the Piracicaba River, a tributary of the Tiete River. The Tiete River flows through the state of Sao Paulo and eventually reaches the Parana River basin, which empties into the Rio de la Plata estuary. This downstream connection highlights the plant's role in protecting water quality in a region that supports diverse aquatic life and provides water for agricultural and urban uses.

The plant's discharge contributes to the Piracicaba River basin, which is part of the larger Tiete River watershed. The Tiete River flows through Sao Paulo state and joins the Parana River, ultimately reaching the Rio de la Plata estuary. This watershed supports a variety of aquatic species and is important for regional water supply. The secondary treatment provided by the plant helps reduce nutrient and organic loads, mitigating eutrophication risks in downstream water bodies.