Papatlatla Wastewater Treatment Plant, Hidalgo, Mexico

Papatlatla wastewater treatment plant is located in the town of Papatlatla, within the municipality of Calnali, in the state of Hidalgo, Mexico. The plant serves a population of 1,825 residents, making it a small-scale facility designed to manage local domestic wastewater. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. Its designed capacity is 172.80 cubic meters per day, with a daily discharge volume matching that figure. As a Mexican facility, it operates under the national water quality standards (NOM-001-SEMARNAT-1996) that set discharge limits for pollutants into national waters. The treated effluent is released into a local watercourse that ultimately drains into the Gulf of Mexico via the Pánuco River basin. This connection to a major river system underscores the plant's role in protecting downstream water quality and aquatic habitats in the region.

The plant discharges into a tributary of the Pánuco River basin, which flows eastward to the Gulf of Mexico. This watershed supports diverse freshwater and estuarine ecosystems, including fish and migratory bird species. The secondary treatment helps reduce organic pollution and nutrient loading, mitigating eutrophication risks in downstream water bodies.