Overview
Piedras Negras wastewater treatment plant serves 18,255 people in Coahuila, Mexico. The facility discharges into the Rio Grande basin, supporting downstream water quality in the region.
The Piedras Negras wastewater treatment plant is located in the city of Piedras Negras, Coahuila, Mexico, along the US-Mexico border. It serves a population of approximately 18,255 residents, classifying it as a medium-sized agglomeration under Mexican wastewater regulations. As a plant in Mexico, it operates under the national water quality standards set by CONAGUA (Comisión Nacional del Agua), which mandate treatment levels appropriate for the receiving water body. For plants serving populations over 10,000, secondary treatment is typically required to reduce organic pollutants and suspended solids before discharge. The treated effluent is discharged into the Rio Grande (Río Bravo) basin, which flows southeast to the Gulf of Mexico. This river is a critical water source for both Mexico and the United States, supporting agriculture, wildlife, and communities along its course. The plant's operation helps protect the ecological health of this transboundary waterway.
Environmental context
The plant discharges into the Rio Grande (Río Bravo) watershed, which drains into the Gulf of Mexico. This river system supports diverse aquatic life and provides irrigation for agriculture in the arid border region. The Rio Grande is also a vital migratory corridor for birds and fish species, making wastewater treatment essential for maintaining water quality and ecosystem health downstream.
Frequently asked questions
The plant is located in Piedras Negras, Coahuila, Mexico, on Calle Rayón. It serves the city's population along the US-Mexico border.
The plant serves approximately 18,255 people, making it a medium-sized agglomeration under Mexican wastewater regulations.
The treated effluent is discharged into the Rio Grande (Río Bravo) basin, which flows to the Gulf of Mexico. The plant helps protect water quality in this transboundary river.
The plant operates under Mexico's national water quality standards enforced by CONAGUA. For plants serving over 10,000 people, secondary treatment is typically required to meet discharge limits.
In Mexico, plants serving populations between 10,000 and 100,000 are generally required to provide secondary treatment, which includes biological processes to reduce organic matter and suspended solids before discharge.
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