20 de Noviembre Wastewater Treatment Plant, El Pueblito, Durango, Mexico

The 20 de Noviembre wastewater treatment plant is located in the rural community of El Pueblito veinte de Noviembre, within the municipality of Nombre de Dios, Durango, Mexico. Serving a population of 913, it is a small-scale facility that plays a key role in local sanitation infrastructure. The plant operates with secondary treatment, which is appropriate for its size and inland location. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant's designed capacity of 129.60 cubic meters per day exceeds the current discharge volume of 86.40, indicating operational headroom. The treated effluent likely drains into local waterways that feed into the Nazas River basin, an important hydrological system in northern Mexico. This region is semi-arid, and water quality management is critical for agricultural and ecological health. The plant's operation helps protect downstream water resources from untreated sewage.

The plant discharges into the Nazas River basin, which flows through Durango and Coahuila before ending in the Laguna de Mayran, an endorheic lake. This watershed supports irrigated agriculture and wildlife, including migratory birds. Effective wastewater treatment is vital to prevent nutrient loading and maintain water quality in this sensitive arid-region ecosystem.