La Colorada Wastewater Treatment Plant, Villa de Cos, Zacatecas, Mexico

La Colorada is a wastewater treatment plant located in the locality of La Colorada [Estación de Ferrocarril], within the municipality of Villa de Cos, Zacatecas, Mexico. The plant serves a population of 913 and operates under Mexico's national water regulations, which require treatment for municipal discharges. The plant provides secondary treatment, a standard level for small communities in Mexico. Its designed capacity is 129.60 m³/day, and it currently treats 86.40 m³/day, indicating available capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into the local watershed, which is part of the arid interior basin of Zacatecas. The region's water resources are limited, and the plant plays a role in protecting local water quality and supporting downstream ecosystems, which include seasonal streams and agricultural areas.

The plant discharges into the interior drainage basin of Zacatecas, an arid region where water is scarce. The treated effluent likely enters a local arroyo or stream that flows into the larger San Luis Potosí basin, eventually contributing to the Pánuco River system and the Gulf of Mexico. Protecting water quality in this watershed is critical for sustaining local agriculture and the fragile desert ecosystem.