Chichimequillas Wastewater Treatment Plant, El Marqués, Querétaro

Chichimequillas wastewater treatment plant is located in El Marqués, Querétaro, Mexico, serving a population of approximately 5,000 residents. The facility operates under Mexico's national water regulations, which mandate secondary treatment for communities of this scale to protect water quality. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 518.40 cubic meters per day and an average daily discharge of 471.74 cubic meters, the plant operates at about 91% of its capacity, indicating efficient utilization. Treated effluent from the plant is discharged into local water bodies that ultimately drain into the Pánuco River basin, which flows into the Gulf of Mexico. This region supports diverse aquatic life and is important for agricultural irrigation downstream. Proper treatment helps reduce nutrient loading and protects downstream ecosystems.

The plant discharges into local streams that are part of the Pánuco River basin, one of Mexico's major river systems. The Pánuco River flows into the Gulf of Mexico, supporting estuarine habitats and fisheries. The region's semi-arid climate makes water quality management critical for both ecological health and human use, including agriculture and drinking water supply.