San Martin Jajalpa II Wastewater Treatment Plant, Ocoyoacac, Estado de Mexico

San Martin Jajalpa II is a municipal wastewater treatment facility located in Ocoyoacac, Estado de Mexico, Mexico. The plant serves a population of 2,738 and is part of the region's water infrastructure for the Mexico City metropolitan area. The plant provides secondary treatment, which is the standard biological treatment process for removing organic matter and suspended solids. With a designed capacity of 259.20 cubic meters per day, the plant operates under Mexico's national water regulations (Ley de Aguas Nacionales) and NOM-001-SEMARNAT-1996 standards for wastewater discharge. The treated effluent is discharged into the local watershed, which ultimately drains into the Lerma River basin. The Lerma River flows into Lake Chapala, Mexico's largest freshwater lake, supporting diverse aquatic ecosystems and providing water for agriculture and communities downstream.

The plant discharges into the Lerma River basin, which flows into Lake Chapala, the largest freshwater lake in Mexico. This watershed supports a variety of aquatic life and is an important resource for irrigation and drinking water. The region's high-altitude climate and proximity to urban areas require careful management to protect water quality and ecosystem health.