Overview
San Nicolas de Presidio is a secondary wastewater treatment plant in Tepehuanes, Durango, Mexico, serving a small population of 352. It discharges 86.40 cubic meters of treated wastewater daily.
San Nicolas de Presidio is a wastewater treatment plant located in Tepehuanes, within the state of Durango, Mexico. The facility serves a small population of 352 residents, reflecting its role in a rural or small community setting. As part of Mexico's wastewater infrastructure, it contributes to local sanitation and environmental protection. The plant employs secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 345.60 cubic meters per day and an actual discharge volume of 86.40 cubic meters per day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. Under Mexico's national water regulations (NOM-001-SEMARNAT-1996), secondary treatment is required for discharges into national waters, ensuring compliance with basic effluent quality standards. The treated effluent is discharged into a local water body, likely a river or stream within the Nazas River basin, which ultimately drains into the Laguna de Mayran or the Rio Grande de Nazas system. This watershed supports agricultural activities and provides habitat for native aquatic species. The plant's operation helps protect downstream water quality and public health in the region.
Environmental context
The plant discharges into a local watercourse within the Nazas River basin, which flows through the arid and semi-arid landscapes of Durango. The Nazas River is a vital water source for irrigation and supports a fragile ecosystem adapted to seasonal flows. Downstream, the river contributes to the Laguna de Mayran, an important wetland area that provides habitat for migratory birds and endemic species. The plant's secondary treatment helps reduce organic pollution, safeguarding this sensitive environment.
Frequently asked questions
The plant is located in Tepehuanes, in the state of Durango, Mexico.
The plant serves a population of 352 people.
The plant discharges treated effluent into a local water body within the Nazas River basin, which flows toward the Laguna de Mayran.
The plant provides secondary treatment, which is the standard biological process required under Mexican regulations for discharges into national waters.
The plant operates under Mexico's NOM-001-SEMARNAT-1996, which sets maximum permissible limits for pollutants in wastewater discharges. For small communities, secondary treatment is typically sufficient to meet these standards.
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