Viborillas Wastewater Treatment Plant, Querétaro, Mexico

Viborillas wastewater treatment plant is located in the municipality of Colón, Querétaro, Mexico. It serves a small population of 894 residents, providing secondary treatment for municipal wastewater. The plant has a designed capacity of 129.60 thousand cubic meters per year and currently discharges 84.67 thousand cubic meters annually. As a secondary treatment facility, Viborillas meets the standard level of treatment required for municipal wastewater in Mexico under the national water law (Ley de Aguas Nacionales) and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants. For small communities like Viborillas, secondary treatment is typical and sufficient to protect local water quality. The treated effluent from Viborillas is discharged into local water bodies within the Pánuco River basin, which ultimately drains into the Gulf of Mexico. The plant plays a key role in protecting downstream ecosystems, including rivers and estuaries that support diverse aquatic life and are important for regional biodiversity.

Viborillas is located inland in the state of Querétaro, within the Pánuco River basin. The treated wastewater flows into local streams that feed the Pánuco River, which empties into the Gulf of Mexico. This watershed supports a variety of aquatic species and is ecologically sensitive, particularly in the lower reaches where wetlands and coastal habitats provide critical ecosystem services.