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The Metropolitan Water District of Southern California
Renewable Energy

​The use of renewable energy by the Metropolitan Water District of Southern California dates back to the beginnings of the Colorado River Aqueduct, which uses hydroelectric power from Hoover and Parker Dam to move water to the coastal plain of California. The advent of the State Water Project created more opportunities for generating hydropower. Today, Metropolitan has 16 small-conduit hydroelectric power recovery plants with a total nameplate capacity of about 130 megawatts.

The Metropolitan Water District of Southern California has adopted energy management policies in order to adapt to ever growing issues such as climate change and greenhouse gas emissions. These policies were established in order to contain costs, reduce financial exposure to escalating electrical power markets and continue establishing energy independence and guide the District as it moves forward with cost-effective and environmentally responsible programs, projects and initiatives.

Renewable energy is a growing part of Metropolitan's energy portfolio, as the District continues to explore cost-effective opportunities to take advantage of the District's land and structural assets to expand its pollution-free production of electricity. 


Metropolitan’s Headquarter building is ENERGY STAR rated, receiving a 97 out of 100 in 2015. The ENERGY STAR score provides a comprehensive snapshot of the building’s energy performance. It assesses the building’s physical assets, operations, and occupant behavior in a quick and easy-to-understand number. Additionally, Metropolitan has three solar photovoltaic energy facilities:

  • Metropolitan's Robert A. Skinner Water Treatment plant was retrofitted with a 1 mw solar power facility that generates approximately 2.3 million kilowatt hours of clean, renewable energy a year, which is nearly 20 percent of the power used by the plant. The Skinner facility helps to offset nearly 2 million pounds of carbon dioxide (CO₂) annually. 
  • A solar facility at the Diamond Valley Lake Visitor Center is rated at 0.52 megawatts, and produced 331.75 mw of energy in fiscal year 2014/15.
  • The newest installation is at Metropolitan’s F.E. Weymouth Water Treatment Plant in La Verne. The 3-megawatt solar power generating facility will produce power to help operate the plant and offset nearly 60,000 tons of greenhouse gases over the project’s expected 30-year lifetime. Read press release
Renewable Energy