ETE SERRINHA Wastewater Treatment Plant, Biritinga, Bahia, Brazil

ETE SERRINHA is a wastewater treatment plant located in Vila Nova, Biritinga, within the state of Bahia, Brazil. It serves a population of around 33,635 people, classifying it as a medium-sized agglomeration under Brazilian regulatory frameworks. The plant is situated in the northeastern region of Brazil, an area characterized by a semi-arid climate and seasonal rainfall patterns. As a facility in Brazil, ETE SERRINHA operates under the national environmental regulations set by the National Environment Council (CONAMA) and the National Water Agency (ANA). Brazilian legislation requires adequate treatment for municipal wastewater, with standards varying by receiving water body classification. For a plant serving this population size, secondary treatment is typically expected to meet effluent quality standards. The treated wastewater from ETE SERRINHA is discharged into local water bodies that drain into the Atlantic Ocean via the coastal basins of Bahia. The plant's location inland, more than 50 km from the coast, reduces direct marine impact but still influences downstream freshwater ecosystems. Protecting the water quality of local rivers and streams is essential for maintaining biodiversity and supporting communities that rely on these resources.

The plant discharges into local water bodies that are part of the Atlantic coastal drainage system in Bahia, ultimately reaching the Atlantic Ocean. The region's semi-arid climate means that water resources are limited, making the protection of local rivers and streams critical for both ecological health and human use. Downstream environments support diverse aquatic life and provide water for agriculture and domestic use.