Doctor Francisco Castillo Najera Wastewater Treatment Plant, Durango, Mexico

The Doctor Francisco Castillo Najera wastewater treatment plant is located in the town of Doctor Francisco Castillo Nájera, within the municipality of Pánuco de Coronado, Durango, Mexico. This facility serves a small population of 319 residents, reflecting its role in a rural or peri-urban community. The plant is part of Mexico's national wastewater infrastructure, which is regulated under the Ley de Aguas Nacionales and managed by the Comisión Nacional del Agua (CONAGUA). The plant provides secondary treatment, a standard level for small communities in Mexico, which typically involves biological processes to reduce organic matter and suspended solids. It has a design capacity of 73.44 cubic meters per day and currently treats an average of 38.88 cubic meters daily, indicating a utilization rate of about 53%. This suggests the plant has room for future growth or seasonal fluctuations. The treated effluent is discharged into local water bodies, likely contributing to the Nazas River basin, which drains into the Laguna de Mayrán, an endorheic basin in the arid region of northern Mexico. The plant's operation helps protect local water quality and supports the ecological health of the surrounding semi-arid environment, where water resources are scarce and sensitive to pollution.

The plant discharges into the Nazas River basin, which flows into the Laguna de Mayrán, a closed basin in the Chihuahuan Desert. This region is ecologically sensitive due to its arid climate and limited water resources. The treated effluent supports local aquatic habitats and helps maintain water quality for downstream uses, including agriculture and wildlife. The area is part of a semi-arid ecosystem where water conservation and pollution control are critical for sustaining biodiversity and human communities.