Colina del Sol Wastewater Treatment Plant, Almoloya de Juárez, Estado de México

Colina del Sol is a wastewater treatment plant located in Almoloya de Juárez, within the Estado de México, Mexico. It serves a population of approximately 1,825 people, classifying it as a small-scale municipal facility. The plant is situated inland, away from coastal areas, and operates under Mexico's national water regulations. The plant provides secondary treatment, which is the standard biological treatment process for removing organic matter and suspended solids. With a designed capacity of 172.80 volume units and a discharge volume matching that figure, the facility operates at full capacity. As a small agglomeration, it meets the treatment expectations set by Mexican environmental authorities, which require secondary treatment for urban wastewater. The treated effluent is discharged into local water bodies that ultimately drain into the Lerma River basin, a major hydrological system in central Mexico. The Lerma River flows into Lake Chapala, Mexico's largest freshwater lake, which supports diverse aquatic life and provides water for irrigation and human consumption. Proper treatment at plants like Colina del Sol is vital for protecting downstream ecosystems and water quality.

The plant discharges into the Lerma River basin, which flows into Lake Chapala, the largest freshwater lake in Mexico. This watershed supports a variety of aquatic species and provides water for agricultural and urban use. Effective secondary treatment helps reduce nutrient and organic pollution, safeguarding the ecological health of the river and lake system.