Zona Poniente Wastewater Treatment Plant, Zacatecas, Mexico

Zona Poniente is a wastewater treatment plant located in Zacatecas, Mexico, serving the city of Zacatecas and surrounding areas. The plant has a designed capacity of 1.00 and serves a population of 91,273, placing it in the medium-to-large agglomeration category. The plant operates under Mexico's national wastewater standards, which are enforced by the Federal Commission for the Protection against Sanitary Risks (COFEPRIS) and the National Water Commission (CONAGUA). For plants of this scale, secondary treatment is typically required to meet discharge standards for organic matter and suspended solids. The plant's treated effluent likely discharges into a local watercourse within the Zacatecas region, which is part of the interior drainage basin of the Mexican Plateau. The area is semi-arid, and water resources are critical for agriculture and local ecosystems. Proper treatment helps protect downstream water quality and supports sustainable water use.

The plant is located in Zacatecas, a semi-arid region in central Mexico. Treated wastewater likely discharges into a local arroyo or river that drains into the interior basin of the Mexican Plateau, ultimately contributing to groundwater recharge or endorheic lakes. The region's water resources are limited, and the plant plays a key role in protecting local water quality and supporting downstream ecosystems, including agricultural areas and seasonal wetlands.