Esperanzas Wastewater Treatment Plant, Las Esperanzas (El Ranchito), Zacatecas

Esperanzas is a wastewater treatment plant located in the community of Las Esperanzas (El Ranchito) within the municipality of Río Grande, Zacatecas, Mexico. The plant serves a population of approximately 5,427 residents, providing secondary treatment to manage domestic wastewater from the area. The plant has a designed capacity of 1,226.88 cubic meters per day and currently treats an average daily volume of 984.96 cubic meters. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids, meeting the standard treatment requirements for communities of this size in Mexico under the national water quality regulations (NOM-001-SEMARNAT). The treated effluent is discharged into local watercourses that eventually drain into the Río Grande basin, part of the larger hydrological system feeding into the Pacific Ocean. The plant plays a key role in protecting downstream water quality and supporting the ecological health of the region's arid and semi-arid watersheds.

The plant discharges into the Río Grande basin in Zacatecas, a semi-arid region where water resources are scarce and ecologically sensitive. The treated effluent contributes to the flow of local streams that eventually reach the Pacific Ocean via the Lerma-Santiago system. Protecting water quality in this basin is critical for sustaining aquatic life and supporting agricultural and domestic water uses downstream.