Bajío de Vacas Wastewater Treatment Plant, El Patio de Altares, Durango, Mexico

Bajío de Vacas is a wastewater treatment plant located in El Patio de Altares, a locality in the municipality of Otáez, Durango, Mexico. The plant serves a small population of 387 residents, reflecting its role in a rural community. It operates under Mexico's national water regulations, which require treatment for municipal wastewater. The plant provides secondary treatment, a standard level for small communities in Mexico. Its designed capacity is 150.34 cubic meters per day, with an actual discharge volume of 39.74 cubic meters per day, indicating it operates well below capacity. This suggests the plant can accommodate future growth or seasonal variations in flow. The treated effluent is discharged into local waterways that eventually drain into the Pacific Ocean via the Río San Pedro Mezquital basin. The plant helps protect downstream water quality in a region characterized by mountainous terrain and seasonal rainfall. Proper treatment is essential for preserving aquatic habitats and supporting local agriculture.

The plant discharges into the Río San Pedro Mezquital basin, which flows through the Sierra Madre Occidental and ultimately reaches the Pacific Ocean. This watershed supports diverse aquatic life and provides water for irrigation in the region. The plant's secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in downstream ecosystems.