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This project was Certified on July 21, 2009


Water / Wastewater


Rosarito, Baja California, MEX

Benefited Population

21,802 people

Projected Cost

$4,530,000.00 USD


Comisión Estatal de Servicios Públicos de Tijuana



The project consists of the expansion of the Rosarito I WWTP, located in Playas de Rosarito Baja California, in order to increase treatment capacity from 60 to 120 lps (1.4-2.8 MGD). The existing Rosarito I WWTP provides secondary treatment consisting of an Extended Aeration/Activated Sludge (EA/AS) treatment system, which includes: a pretreatment unit, two aerated lagoons, secondary clarifier, sludge digester and sludge drying unit. The plant provides a total treatment capacity of 60 lps (1.4 MGD). The proposed project includes the installation of a pretreatment unit for discharges from septic tanks service trucks and another unit for municipal wastewater from wastewater collection system. It also includes the construction of an aeration tank for incoming wastewater (aerobic reactor, oxidation ditch type), a secondary clarifier, UV light disinfection and a sludge digester.

    Certification Document

Close Out Report

Close Out Report

The Close‐Out Process provides a review of physical facilities constructed, facility performance and achievement of objectives, as reflected in a results measurement matrix.

    Close Out Report   (PDF, 266 KB)