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      Department of Public Works Bureau of Sanitation
Each day, in laboratories, on research vessels, and along our shoreline, the City of Los Angeles monitors the environmental health of Santa Monica Bay. On these pages you will read about our monitoring efforts and our assessment of the current conditions in the Bay.

Additionally, we report how the City’s wastewater and stormwater flows are managed and how these flows have impacted the health of the Bay and the public. The conclusions are based on thousands of samples and tests with a focus on those performed over the past 24 months.

This report is a online edition of the City of Los Angeles, Environmental Monitoring Division’s Santa Monica Bay Biennial Assessment Report.

The formal report provides extensive monitoring data to regulators and is required as a part of the permit which allows the City of Los Angeles to discharge treated wastewater into the Bay. Agencies and organizations that receive the report include the U.S. Environmental Protection Agency (U.S. EPA), the Los Angeles Regional Water Quality Control Board, local municipalities, environmental groups, various Santa Monica Bay stakeholders, and other entities.

The formal report can be obtained by contacting the Environmental Monitoring Division, Bureau of Sanitation, City of Los Angeles at 310-648-5716 or by downloading here.

The monitoring data collected from January 2003 to December 2004 reflect an encouraging trend: environmental conditions in most parts of the Bay are good and getting better. This shows that while there is still more that can be done, the City’s efforts, along with those of other concerned agencies, organizations, and countless residents are making a quantifiable difference in the Bay’s health. We can’t afford to do less. A healthy Bay is a vital natural resource for everyone who visits, lives, and works in Southern California.

Thank you for your interest in the health of Santa Monica Bay. For more details on any information in this document, please call 310-648-5716 or visit EMD’s web site.

Cynthia Ruiz, President
City of Los Angeles / Board of Public Works

Rita L. Robinson, Director
Bureau of Sanitation

Mas Dojiri, Division Manager
Bureau of Sanitation / Environmental Monitoring Division


Permits and the Environmental Monitoring Division

The City of Los Angeles, the U.S. EPA, and the Los Angeles Regional Water Quality Control Board are partners in managing the water quality and general health of Santa Monica Bay, in part by developing, complying with, and enforcing National Pollutant Discharge Elimination System (NPDES) permits for the operation of the Hyperion Treatment Plant and for the discharge of the City’s stormwater and urban runoff.

The City has invested billions of dollars in new wastewater treatment technologies and stormwater and urban runoff control measures. In addition, it has implemented the most stringent operating procedures in Hyperion’s history, including comprehensive monitoring protocols to protect public health and the area’s natural resources. To ensure that the stringent permit standards are met, the plant’s treatment processes, final effluent, Santa Monica Bay water, sediments, and marine organisms are continuously tested and analyzed by marine biologists, microbiologists, chemists, and laboratory technicians from the Bureau of Sanitation’s Environmental Monitoring Division (EMD). EMD operates the most extensive monitoring program in Santa Monica Bay. The scientists have stateof-the-art equipment to perform the full range of procedures required by regulatory permits and other mandates.

Wastewater Management

Los Angeles operates and maintains the largest wastewater collection system in the United States. More than 6,700 miles of sewers connect residences and businesses to the City’s four wastewater treatment plants, including the Hyperion Treatment Plant in Playa del Rey. In 2003 and 2004, an average of 342 million gallons of wastewater was treated to the full secondary level each day at Hyperion during dry weather. The final effluent is discharged through a 5-Mile Outfall into Santa Monica Bay.

To learn more about the treatment process, visit the Hyperion web site.

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