San Miguel Totolapan Wastewater Treatment Plant, Guerrero, Mexico

San Miguel Totolapan is a wastewater treatment plant located in the municipality of San Miguel Totolapan, Guerrero, Mexico. The plant serves a population of approximately 3,651 people, classifying it as a small-scale facility within the region's wastewater infrastructure. The plant employs secondary treatment, which is the standard biological treatment process for municipal wastewater in Mexico under the national water quality regulations (NOM-001-SEMARNAT-1996). Secondary treatment typically involves biological oxidation and sedimentation to reduce organic matter and suspended solids. The plant has a designed capacity of 498.53 m³/day and currently discharges 345.60 m³/day, indicating operational capacity below design levels. The treated effluent is discharged into local water bodies that ultimately drain into the Pacific Ocean via the Balsas River basin. The plant plays a crucial role in protecting downstream aquatic ecosystems and communities from untreated sewage, supporting water quality in a region characterized by tropical climate and agricultural activity.

The plant discharges into the Balsas River basin, one of Mexico's largest river systems, which flows southwest into the Pacific Ocean. The Balsas River supports diverse aquatic life and is an important water source for irrigation and local communities. Downstream ecosystems include seasonal wetlands and coastal lagoons that provide habitat for migratory birds and fish species. The plant's secondary treatment helps reduce organic pollution and nutrient loading, mitigating eutrophication risks in the receiving waters.