However, claims that the four dams’ removal affected Southern California’s water supply are incorrect. While Los Angeles officials reported that water storage tanks in the Pacific Palisades neighborhood of Los Angeles County “went dry” early Wednesday morning, the removal of the dams along the Klamath River played no role in the shortage. The water stored in the dams, located more than 500 miles away from Los Angeles County, was primarily used to spin a turbine and generate electricity. The dams’ reservoirs were used to supply water to firefighting forces fending off wildfires, but only in that region, not in Southern California. Further, the removal project took a host of measures to “avoid a net diminution in firefighting resources or an increase in the fire ignition risk as a result of the loss of the Project reservoirs.”
Southern California never received water from those dams, even when they were operational. The
Metropolitan Water District of Southern California, a state-run agency that delivers water across six counties—including Los Angeles County—does not take water from the Klamath River area. About 30 percent of the water supplied to Southern California comes from the Northern Sierra region of California, transported south through the State Water Project, California’s water storage and delivery system that spans more than 700 miles. Southern California receives an additional 20 percent of its water from the Colorado River, collected near California’s border with Arizona and delivered via aqueduct. The region receives the rest of its water from a variety of sources, including the eastern part of California’s Sierra mountain range, several local reservoirs, recycled water, groundwater collected from underground aquifers and from desalination (treating seawater by removing the salt).