Ojo de Agua de Los Montes Wastewater Treatment Plant, Tepezalá, Aguascalientes

Ojo de Agua de Los Montes wastewater treatment plant is located in the town of Ojo de Agua de los Montes, within the municipality of Tepezalá, Aguascalientes, Mexico. The plant serves a population of 1,815 and is part of the state's wastewater infrastructure for small communities. The plant operates with secondary treatment, which is the minimum standard required under Mexican regulations (NOM-001-SEMARNAT-1996) for discharge into water bodies. It has a designed capacity of 241.92 m³/day and currently discharges 250.56 m³/day, indicating operation near its design capacity. As a small-scale facility, it is subject to national water quality standards for effluent discharge. The treated effluent is discharged into the local watershed, which ultimately drains into the Rio San Pedro and then into the Rio Grande de Santiago, a major river system flowing into the Pacific Ocean. The plant plays a key role in protecting local water resources and downstream ecosystems in the Aguascalientes region.

The plant discharges into the Rio San Pedro basin, which flows into the Rio Grande de Santiago and eventually reaches the Pacific Ocean. The region is semi-arid, making water quality management critical for local agriculture and aquatic life. The downstream environment supports diverse species and is an important water source for communities and irrigation.