Oriente Wastewater Treatment Plant, Durango, Mexico

Oriente is a wastewater treatment plant located in Durango, Durango, Mexico. It serves a population of 124,635, classifying it as a medium-to-large agglomeration under Mexican standards. The plant's designed capacity is 1. As a facility in Mexico, Oriente is subject to the country's federal water laws, including the National Water Law (Ley de Aguas Nacionales) and regulations from the National Water Commission (CONAGUA). For plants serving over 100,000 people, secondary treatment is typically required, with additional nutrient removal in sensitive watersheds. The plant's treated effluent is discharged into the local watershed, which drains into the Pacific Ocean via the Nazas River basin. This region is semi-arid, and water quality management is critical for downstream agricultural and ecological uses. The plant plays a key role in protecting the Nazas River and its associated ecosystems from untreated wastewater.

Oriente discharges into the Nazas River basin, which flows through Durango and ultimately reaches the Pacific Ocean. The watershed supports agricultural irrigation and local biodiversity, including fish and bird species. Protecting this water body from nutrient pollution and pathogens is essential for maintaining water quality in a semi-arid region where water resources are scarce.