Escuela Secundaria Justo Sierra Wastewater Treatment Plant, Teotihuacán, Estado de México

Escuela Secundaria Justo Sierra is a wastewater treatment plant located in Teotihuacán, Estado de México, Mexico. The facility serves a population of 1,825 and operates with secondary treatment, a standard level for smaller communities in the region. The plant has a designed capacity of 172.80 cubic meters per day and currently discharges the same volume, indicating full utilization. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The treated effluent is discharged into the local watershed, which ultimately drains into the Valley of Mexico basin. This region is ecologically sensitive due to its high altitude and historical lake system, now largely drained. The plant helps protect local water quality and downstream ecosystems.

The plant discharges into the local drainage network within the Valley of Mexico basin, a closed basin that historically contained Lake Texcoco. Today, the basin's waterways flow into the Tula River system via drainage canals, eventually reaching the Gulf of Mexico. The area supports diverse aquatic life and is important for migratory birds, making proper wastewater treatment essential for ecological health.