Cd. Acuna, Coahuila, Mexico

Comprehensive Sewerage Collection and Treatment Systems Project for Ciudad Acuña, Coahuila

Status: Completed


This project involves the construction, rehabilitation and expansion of the primary and secondary sewage systems and pump station, as well as the construction of a new wastewater treatment plant. The project is divided into three phases spanning a 20-year period.

Phase I (1999-2000) financed under a 20-year Build-Operate-Transfer (BOT) concession agreement:

  • Construction of the wastewater treatment plant
  • Expand and rehabilitate the primary sewage system to increase
    the coverage from 49 percent to 75 percent of the population as
    of 1998.
  • Rehabilitate the secondary sewage system in the downtown area.

Phase II (2000-2005):

  • Continue expansion work of the primary sewage system to increase coverage from 75 percent to 100 percent of the population. It includes the construction and rehabilitation of 114 km of sanitary sewage pipelines.
  • In terms of the secondary sewage system, rehabilitate the existing residential sewage system and expand into areas that currently do not have sewage collection.

Phase III (2006-2018):

  • Expansion of the primary sewage system to maintain coverage for 100 percent of the population through the year 2018 and includes construction of 500.4 km of sanitary sewage pipelines to serve future population growth.
  • The secondary sewage system will continue to be rehabilitated and expanded to meet the needs of the population and maintain 100 percent coverage through the year 2018.


With the implementation of this project, all residents of Ciudad Acuña will receive wastewater collection and treatment services. Furthermore, the well-being of the region’s population will be enhanced by ensuring that the wastewater is adequately treated and preventing raw sewage from being discharged into the Rio Grande, thus improving the quality of the river water.

Project Financing

Total Project Cost US 78.8M
NADB Funding US 1.88M - NADB Loan
Other Funding Partners Institutional Development Program
Mexican National Water Commission, ( Comisión Nacional del Agua (CNA)
Mexican State and Local Authorities