San Pedro Ahuacatlán II Wastewater Treatment Plant, San Juan del Río, Querétaro

San Pedro Ahuacatlán II is a major wastewater treatment plant located in San Juan del Río, Querétaro, Mexico. It serves a population of approximately 255,563 people, classifying it as a large agglomeration under Mexican water management standards. The plant is situated in the semi-arid highlands of central Mexico, an area characterized by seasonal rainfall and significant industrial activity. As a large-scale facility, San Pedro Ahuacatlán II is expected to comply with Mexico's official standards for wastewater treatment, which mandate secondary treatment for municipal discharges. The plant's designed capacity is 1.00 cubic meter per second, indicating substantial infrastructure to handle the region's wastewater. Treatment processes typically include biological and physical-chemical stages to reduce organic load and suspended solids before discharge. The treated effluent from the plant likely discharges into the San Juan River, a tributary of the Pánuco River basin, which ultimately flows into the Gulf of Mexico. This river system supports diverse aquatic life and is used for agricultural irrigation downstream. Proper treatment at this plant is critical to prevent eutrophication and protect water quality in the region's water bodies.

The plant discharges into the San Juan River, part of the Pánuco River basin, which drains into the Gulf of Mexico. This watershed supports agricultural activities and provides habitat for freshwater species. Effective treatment is essential to control nutrient loading and maintain ecological balance in the downstream aquatic environment.