San Pedro Cholula Wastewater Treatment Plant, Ocoyoacac, Estado de México

The San Pedro Cholula wastewater treatment plant is located in Ocoyoacac, Estado de México, Mexico, serving a population of approximately 9,127. The plant provides secondary treatment, which is a standard biological process that removes organic matter and suspended solids from wastewater before discharge. The plant has a designed capacity of 1,296 m³/day and currently treats an average of 864 m³/day, indicating it operates below its full capacity. As a municipal facility in Mexico, it falls under national water quality regulations, which require secondary treatment for discharges to surface waters to protect public health and the environment. The treated effluent is discharged into local water bodies that ultimately drain into the Lerma River basin, a major hydrological system in central Mexico. The Lerma River flows into Lake Chapala, Mexico's largest freshwater lake, which supports diverse aquatic life and provides water for irrigation and human consumption. Proper treatment at plants like San Pedro Cholula is essential to prevent nutrient pollution and protect downstream ecosystems.

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 species and provides critical water resources for agriculture and communities downstream. Effective wastewater treatment is vital to control nutrient loading and maintain water quality in this ecologically sensitive system.