San Pedro Tenango Wastewater Treatment Plant, Apaseo el Grande, Guanajuato

San Pedro Tenango is a wastewater treatment plant located in the community of San Pedro Tenango, within the municipality of Apaseo el Grande, Guanajuato, Mexico. The plant serves a population of 8,215 and operates at a secondary treatment level, which is typical for smaller agglomerations in the region. As a secondary treatment facility, San Pedro Tenango employs biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 777.60 volume units, with a discharge volume matching that figure, indicating full utilization. In Mexico, wastewater treatment plants are regulated under the National Water Law (Ley de Aguas Nacionales) and overseen by the National Water Commission (CONAGUA), which sets discharge standards to protect water quality. The treated effluent from San Pedro Tenango 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 agriculture and human consumption. Proper treatment at plants like San Pedro Tenango is essential to prevent nutrient pollution and protect downstream ecosystems.

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 is an important resource for irrigation and drinking water. Effective wastewater treatment is critical to prevent eutrophication and maintain water quality in this ecologically sensitive region.