Guillermo Prieto Wastewater Treatment Plant, Durango, Mexico

The Guillermo Prieto wastewater treatment plant is located in the town of Guillermo Prieto, within the municipality of Nuevo Ideal, Durango, Mexico. This facility serves a small population of 639 residents, reflecting its role in a rural or semi-urban community. The plant is situated inland, far from coastal areas, and its operations are part of Mexico's national wastewater management infrastructure. The plant provides secondary treatment, which is the standard biological treatment level required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater. With a designed capacity of 73.44 m³/day and an actual discharge volume of 60.48 m³/day, the facility operates below its capacity, indicating room for future growth or seasonal variations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local water bodies, likely contributing to the Nazas River basin or nearby arroyos that drain into the Laguna de Mayrán or the endorheic basin of the Bolsón de Mapimí. This region is semi-arid, so the plant's discharge supports local water resources and downstream ecosystems, including agricultural and wildlife habitats. The plant's operation helps protect water quality in a water-scarce area.

The plant discharges into local watercourses that are part of the Nazas River basin, which flows into the Laguna de Mayrán, an important wetland in the arid Bolsón de Mapimí region. This area supports diverse aquatic life and migratory birds, making the plant's secondary treatment crucial for maintaining water quality in a water-stressed environment. The semi-arid climate means that even small discharges contribute significantly to local hydrology and ecosystem health.