A historical review of sewage and wastewater systems in the San Diego-Tijuana metropolitan region. A general worldwide sewerage history precedes a more detailed history of the San Diego-Tijuana area. Starting with the days of raw sewage flowing down the dusty streets of Old Town San Diego in the 1800s to today with the modern challenges of scarce potable water, ocean water quality and federal mandates. The complete history of the City of San Diego’s present 550 square mile Metro wastewater system, along with the histories of the various connecting agencies and cities that utilize the San Diego system. A detailed review of Tijuana, Mexico’s wastewater system is presented together with the history of the continuing cross-border pollution and health issues. Over 200 photos and illustration, a full index and detailed appendices compliment the main text of the book.