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This project was Certified on March 24, 2000


Water / Wastewater


Piedras Negras, Coahuila, MEX

Benefited Population

132,561 people

Projected Cost

$56,820,000.00 USD

Technical Assistance

$54,550.00USD from TA Fund

Technical Assistance

$213,005.00USD from PDAP


Comisión Estatal de Agua y Saneamiento de Saltillo



The project consists of improving sewerage services to Piedras Negras, including the construction of a wastewater treatment plant (WWTP), with a capacity of 8.22 million galls per day (mgd). The new WWTP will replace an old oxidation lagoon system that was originally designed and built in the 1960’s to handle 2.63 mgd. The existing lagoon system is operating deficiently due to excessive clogging by sediments.

    Certification Document