Villa Montemorelos Wastewater Treatment Plant, Durango, Mexico

Villa Montemorelos is a wastewater treatment plant located in Villa Montemorelos, a locality in the municipality of Durango, Mexico. The plant serves a population of approximately 1,819 residents, reflecting its role in managing domestic wastewater for this small community in the state of Durango. The facility provides secondary treatment, which is a standard biological process that removes organic matter and suspended solids. With a designed capacity of 449.28 m³/day and a current discharge volume of 190.08 m³/day, the plant operates below its full capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is required for discharges into national waters, ensuring compliance with environmental standards. The treated effluent is discharged into local water bodies that ultimately drain into the Pacific Ocean via the Nazas River basin. The region's semi-arid climate makes water quality management crucial for sustaining local ecosystems and agricultural activities downstream.

The plant discharges into the Nazas River basin, which flows through the arid landscapes of Durango and eventually reaches the Pacific Ocean via the Laguna de Mayran and the Rio Aguanaval system. This watershed supports limited but ecologically important riparian habitats, and the plant's secondary treatment helps protect water quality for downstream agricultural and ecological uses.