Cuijingo Wastewater Treatment Plant, San Matías Cuijingo, Estado de México

Cuijingo wastewater treatment plant is located in San Matías Cuijingo, a community in the municipality of Juchitepec, Estado de México, Mexico. The plant serves a small population of 703 residents, providing secondary treatment as part of the local sanitation infrastructure. The plant has a designed capacity of 1209.60 units and currently discharges 66.53 units of treated wastewater. As a small-scale facility in Mexico, it operates under the national water quality standards (NOM-001-SEMARNAT) which set discharge limits for pollutants. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local water bodies that eventually drain into the Balsas River basin or the Gulf of Mexico watershed. The plant plays a key role in protecting local streams and groundwater from untreated sewage, supporting public health and the ecological health of the surrounding rural landscape.

The plant discharges into local streams that are part of the broader drainage network of the Valley of Mexico, which ultimately flows toward the Balsas River basin and the Pacific Ocean. The region's aquatic ecosystems support diverse species and are important for local agriculture and water supply. Protecting these water bodies from nutrient pollution and pathogens is critical for maintaining water quality and ecological balance.