Los Angeles Wastewater Treatment Plant, Durango, Mexico

The Los Angeles wastewater treatment plant is located in the town of Los Angeles, within the municipality of Poanas, Durango, Mexico. It serves a population of approximately 2,282 residents, classifying it as a small-scale municipal facility. The plant is situated inland, over 10 km from the coast, and operates under Mexico's national water regulations. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. It has a designed capacity of 388.80 thousand cubic meters per year and currently treats 216.00 thousand cubic meters annually. As a small agglomeration, it meets the treatment expectations set by Mexican environmental authorities for communities of this size. The treated effluent is discharged into a local watercourse that ultimately drains into the Pacific Ocean via the Nazas River basin. This region is part of the semi-arid Central Mexican Plateau, where water resources are scarce and the protection of surface water quality is critical for downstream agricultural and ecological uses.

The plant discharges into a tributary of the Nazas River, which flows through the arid landscapes of Durango and eventually reaches the Pacific Ocean via the Laguna de Mayran and the Rio Aguanaval system. The watershed supports limited but ecologically sensitive riparian habitats, including species adapted to seasonal flows. Protecting water quality in this basin is essential for sustaining local agriculture and the downstream freshwater ecosystems that depend on consistent, clean water.