San Pedro Chiaucingo Wastewater Treatment Plant, San Pedro Chiautzingo, Mexico

San Pedro Chiaucingo is a wastewater treatment plant located in San Pedro Chiautzingo, within the municipality of Tepetlaoxtoc, Estado de México, Mexico. The plant serves a population of 2,738 and is part of the region's municipal wastewater infrastructure, contributing to local sanitation and water quality management. The plant provides secondary treatment, which is the standard biological treatment process for removing organic matter and suspended solids. With a designed capacity of 518.40 m³/day and a current discharge volume of 259.20 m³/day, the plant operates at approximately 50% of its capacity. This scale aligns with the needs of a small community, and the plant's performance is subject to Mexico's national water quality regulations (NOM-001-SEMARNAT-1996 and subsequent updates), which set discharge limits for pollutants. The treated effluent is discharged into the local watershed, which ultimately drains into the Gulf of Mexico via the Pánuco River basin. The plant plays a key role in protecting downstream water bodies and ecosystems from untreated wastewater, supporting aquatic life and human uses such as agriculture and recreation.

The plant discharges into the local drainage system within the Pánuco River basin, which flows into the Gulf of Mexico. This watershed supports diverse aquatic habitats and is important for regional biodiversity. The secondary treatment provided helps reduce nutrient and organic loads, mitigating eutrophication risks in downstream water bodies and coastal areas.