The City of Los Angeles historically receives water from five major sources: the Eastern Sierra Nevada watershed (via the Los Angeles Aqueduct); the Colorado River (via the Colorado River Aqueduct) and the Sacramento-San Joaquin Delta (via the State Water Project / California Aqueduct), which are purchased from the Metropolitan Water District of Southern California (MWD); local groundwater; and recycled water for industrial and irrigation purposes. In addition, the City’s successful conservation programs have
reduced demand, preserved the water supply and offset the need for new resources.
excerpted from “Securing L.A.’s Water Supply” Mayor Antonio R. Villaraigosa / City of Los Angeles Department of Water and Power
The current state of the State of California’s reservoirs.