Chignahuapan Wastewater Treatment Plant, Chignahuapan, Puebla, Mexico

The Chignahuapan wastewater treatment plant is located in the town of Chignahuapan, in the state of Puebla, Mexico. It serves a population of about 20,080 people, classifying it as a medium-sized municipal facility. The plant is situated inland, more than 50 km from the coast, and its operations are subject to Mexican environmental standards. As a Mexican wastewater treatment plant serving a medium agglomeration, it is expected to comply with NOM-001-SEMARNAT-1996, which sets maximum permissible limits for pollutants in wastewater discharges into national waters. Plants of this scale typically employ secondary treatment, such as activated sludge or stabilization ponds, to meet regulatory standards. The treated effluent from the Chignahuapan plant is discharged into local water bodies that eventually drain into the Gulf of Mexico via the Pánuco River basin. The surrounding region is characterized by mountainous terrain and a temperate climate, with the plant playing a key role in protecting downstream aquatic ecosystems and water quality for communities and agriculture.

The Chignahuapan plant discharges into local streams that flow into the Pánuco River basin, which ultimately reaches the Gulf of Mexico. This watershed supports diverse aquatic life and provides water for irrigation and human consumption. The plant's treatment helps reduce nutrient and pathogen loads, protecting downstream ecosystems and maintaining water quality in a region with significant ecological and economic importance.