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El Caracol wastewater treatment plant Cancelled

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Early Works
Current Stage: Tendering
In Construction
Project Details


The project involves the construction of the El Caracol wastewater treatment plant in the municipality of Ecatepec, within the Mexico City metropolitan area. El Caracol considers various treatment processes and units to screen for heavy and fine materials. It will have ultraviolet purification systems, employ activated sludge processes, have air stripping treatment systems and have an untreated water pumping station. Sewage sludge from El Caracol's primary and secondary processes will be sent to the Atotonilco wastewater treatment plant, by way of the Emisor Oriente pipeline. El Caracol will ultimately reach capacity of 4m3/s, involving two, 2m3/s phases. Complementary elements include access roads to El Caracol, power supply lines, potable water supply pipelines, treated water transfer lines and sludge transfer lines. Developed under the public-private partnership (PPP) model, the 23-year concession was awarded by Mexico's national water commission Conagua to a consortium composed of Spain's Acciona Agua (holding 50%) and Mexican firms Promotora del Desarrollo de América Latina, Carso Infraestructura and Operadora CICSA. The project is valued at 764mn pesos, of which 40% (301.4mn pesos) is being financed by Mexico's national infrastructure fund Fonadin and the balance by the consortium, with financial support from Mexico's development bank Banobras. Although the project was awarded in September 2012, the project was ultimately cancelled and the tender was declared void, according to information obtained through correspondence with Acciona. Conagua has not made any definitive statement as to why the project was cancelled.

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Principal Works

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Key Specs

Full Name
El Caracol wastewater treatment plant
Project Type
Wastewater treatment plants
Development Phase
Project Status
Project Capacity
345,600  m3/d (cubic meters per day)  Wastewater treatment plants
US$ 205mn

The plant is to be located in the municipality of Ecatepec, within the greater metropolitan area of Mexico City. 

 * The map coordinates represent the approximate latitude and longitude, and not the exact location of the project.

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Owner / operator
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Director of potable water and sanitation
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