Work on a major water line in Tijuana has been finished and service has been restored to more than 1.5 million residents affected during the repairs. … More than 690 colonias in Tijuana and Rosarito lost potable water last Thursday when repairs began. That’s roughly two thirds of residents in the region. … García Castro told the El Sol Newspaper in Tijuana that repairs were necessary on a line that’s more than 70 years old and brings water from the Colorado River, the region’s primary source of water.