Diez de Abril Wastewater Treatment Plant, Santa Clara, Durango, Mexico

Diez de Abril wastewater treatment plant is located in the community of Santa Clara, within the municipality of Diez de Abril, Durango, Mexico. The plant serves a small population of 629 residents, reflecting its role in a rural or peri-urban setting. As part of Mexico's wastewater infrastructure, it contributes to local sanitation and environmental protection. The plant operates with secondary treatment, which is the standard biological process for removing organic matter and suspended solids. It has a designed capacity of 95.04 volume units and currently discharges 63.94 volume units, indicating it is operating below its full capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is required for discharges into national waters to meet quality standards. The treated effluent is discharged into local water bodies that ultimately drain into the endorheic basin of the Mexican Plateau. The region's semi-arid climate means water resources are scarce, making the plant's role in protecting local water quality and enabling water reuse particularly important for the surrounding communities and ecosystems.

The plant discharges into local arroyos and intermittent streams that flow into the endorheic basin of the Mexican Plateau, where water does not reach the sea. This closed basin system is ecologically sensitive, as pollutants can accumulate and affect local biodiversity, including endemic species adapted to arid conditions. The plant's secondary treatment helps reduce organic load and protect these fragile water bodies.