Enrique Calderon Rodriguez Wastewater Treatment Plant, Durango, Mexico

The Enrique Calderon Rodriguez wastewater treatment plant is located in the town of Enrique Calderon Rodriguez, within the municipality of Panuco de Coronado, Durango, Mexico. This facility serves a small community of approximately 192 residents, reflecting its role in rural wastewater management in the region. The plant provides secondary treatment, which is a standard biological process that removes organic matter and suspended solids. With a designed capacity of 34.56 units and an actual discharge volume of 18.14 units, the plant operates below its full capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996), secondary treatment is typically 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 Rio Grande de Santiago basin. The surrounding region is semi-arid, making water quality management critical for agricultural and ecological uses downstream. The plant's operation helps protect local streams and groundwater from untreated sewage, supporting the health of the watershed.

The plant discharges into the Rio Grande de Santiago basin, which flows through Durango and eventually reaches the Pacific Ocean. This watershed supports diverse aquatic life and provides water for irrigation in the region. The semi-arid climate makes the receiving waters sensitive to pollution, as low flows can concentrate contaminants. The plant's secondary treatment helps mitigate impacts on downstream ecosystems and communities.