Chihuahuita Wastewater Treatment Plant, Santa Cruz Luján, Durango, Mexico

Chihuahuita is a wastewater treatment plant located in Santa Cruz Luján, Gómez Palacio, Durango, Mexico. It serves a population of 4,564 and provides secondary treatment, a standard level for municipal wastewater in the region. The plant is situated inland, away from coastal areas, and operates within the regulatory framework of Mexico's national water laws, which require treatment to protect water quality in receiving bodies. The plant has a designed capacity of 864.00 volume units and currently discharges 432.00 volume units daily, indicating it operates at about 50% capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. Under Mexican regulations, plants of this scale are expected to meet effluent standards set by the National Water Commission (CONAGUA). The treated effluent is discharged into local watercourses that eventually drain into the Nazas River basin, part of the endorheic Bolsón de Mapimí region. This watershed supports agricultural activities and provides habitat for native species. Proper treatment is essential to prevent nutrient pollution and protect downstream water quality in this arid region.

The plant discharges into the Nazas River basin, which flows into the endorheic Bolsón de Mapimí, a closed basin with no outlet to the sea. This watershed is ecologically sensitive due to its arid climate and reliance on limited water resources. The treated effluent supports local agriculture and helps maintain base flows in the river, which is critical for aquatic life and migratory birds in the region.