ETE PAU DOS FERROS Wastewater Treatment Plant, Pau dos Ferros, Rio Grande do Norte

ETE PAU DOS FERROS is a municipal wastewater treatment plant located in Pau dos Ferros, a city in the state of Rio Grande do Norte, Brazil. The plant serves a population of approximately 11,824 people, placing it in the small-to-medium agglomeration category under Brazilian regulatory frameworks. It is situated in the semi-arid Northeast region, where water resources are scarce and wastewater treatment is critical for public health and environmental protection. As a plant in Brazil, ETE PAU DOS FERROS operates under the national environmental legislation, including CONAMA resolutions and state-level regulations from Rio Grande do Norte. For agglomerations of this size, secondary treatment is typically required to reduce organic load and pathogens before discharge. It is expected to meet the standards set by the Brazilian National Water and Sanitation Agency (ANA) and the state environmental agency. The treated effluent from ETE PAU DOS FERROS is discharged into local water bodies that drain into the Apodi-Mossoró River basin, eventually reaching the Atlantic Ocean. The semi-arid climate means that receiving waters are often intermittent streams, making proper treatment essential to prevent contamination of limited water resources. The plant plays a key role in protecting downstream ecosystems and supporting water reuse opportunities in the region.

The plant discharges into the Apodi-Mossoró River basin, which flows through the semi-arid Caatinga biome before reaching the Atlantic Ocean near the city of Mossoró. This region experiences seasonal droughts, so maintaining water quality in intermittent streams is critical for local biodiversity and human use. The downstream environment supports a variety of aquatic life adapted to variable flows, and the plant's treatment helps prevent eutrophication and pathogen contamination in this water-stressed area.