San Miguel Wastewater Treatment Plant, San Miguel Tenochtitlan, Estado de México

San Miguel is a wastewater treatment plant located in San Miguel Tenochtitlan, within the municipality of Jocotitlán, Estado de México, Mexico. The plant serves a population of approximately 4,564 people, providing secondary treatment to municipal wastewater. It is situated inland, more than 10 km from the coast, and operates as part of the region's water infrastructure. As a secondary treatment facility, San Miguel meets the standard level of treatment required for municipal wastewater in Mexico under the national water quality regulations (NOM-001-SEMARNAT). The plant has a designed capacity of 1,123.20 m³/day and currently discharges 432.00 m³/day of treated effluent. This capacity utilization suggests the plant is operating below its design capacity, which may allow for future population growth or increased flows. The treated effluent from San Miguel is discharged into local water bodies that eventually drain into the Lerma River basin, a major hydrological system in central Mexico. The Lerma River flows westward to Lake Chapala, Mexico's largest freshwater lake, which supports diverse aquatic life and provides water for agriculture and human consumption. Proper treatment at plants like San Miguel is essential to protect water quality in this important basin.

San Miguel discharges treated wastewater into local streams that are part of the Lerma River basin. The Lerma River flows approximately 750 km westward to empty into Lake Chapala, a critical freshwater resource for the region. The basin supports a variety of aquatic species and provides water for irrigation and drinking water for millions of people. Effective secondary treatment at San Miguel helps reduce nutrient and organic loads, protecting downstream water quality and ecosystem health.