El Troncon Wastewater Treatment Plant, El Troncón, Durango, Mexico

El Troncon is a secondary wastewater treatment plant located in the town of El Troncón, within the municipality of Mezquital, Durango, Mexico. The plant serves a population of 1,095 residents, providing essential sanitation infrastructure for this rural community. It operates as part of Mexico's national wastewater management framework under the oversight of CONAGUA (National Water Commission). The plant employs secondary treatment, which typically involves biological processes to remove organic matter and suspended solids. With a designed capacity of 492.48 cubic meters per day and an actual discharge volume of 103.68 cubic meters per day, the facility operates well below its capacity, indicating room for future growth. For small agglomerations like this, secondary treatment meets the standard requirements under Mexican regulations (NOM-001-SEMARNAT-1996) for discharge into water bodies. The treated effluent is discharged into local watercourses that ultimately drain into the Pacific Ocean via the Mezquital River basin. The surrounding region is characterized by mountainous terrain and semi-arid climate, where water resources are critical for both human consumption and ecosystem health. Proper treatment helps protect downstream aquatic habitats and supports water quality in the Mezquital River system.

The plant's discharge flows into the Mezquital River basin, which drains through the Sierra Madre Occidental and eventually reaches the Pacific Ocean near the city of Mazatlán. This watershed supports diverse aquatic life and provides water for agriculture and local communities. The semi-arid climate makes water quality management particularly important for maintaining ecological balance in the region's rivers and streams.