los Angeles County

Our Story of Water

California has built a water delivery infrastructure capable of moving a drop of water that originates near the northern border all the way down south to the Mexican border. Most of California’s water comes from rain and snow that falls in northern and eastern parts of the state. Two-thirds of the Los Angeles region’s water supply is imported from sources hundreds of miles away.

  • Sierra Nevada Mountains via a system of canals, tunnels, and pipelines
  • California State Water Project (California Aqueduct)
  • Los Angeles Aqueduct
  • Colorado River Aqueduct

One-third of our water supply comes from local resources such as groundwater from local aquifers, surface water stored in reservoirs, recycled water from water reclamation plants, and local reuse of greywater.

  • Groundwater
  • Local Dams and Rivers
  • Local Surface
  • Recycled

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