Your Water - San Diego County Water Authority

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Water Resource Portfolio

water processing tanks that say drinking water

Local Water Supplies

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Reservoirs & Rainfall

colorado river aerial view

Imported Water Supplies

Decreasing our dependency on non-renewable water sources, increasing the diversification of our water supply and bettering the efficiency and conservation of how we use and procure our water.

1991
2025
2045*
  1. *Based on the 2020 Urban Water Management Plan.
  • Conserved Water/ IID
  • Conserved Water/ Canal Lining
  • Metropolitan Water District
  • Seawater Desalination
  • Local Surface Water
  • Recycled Water
  • Groundwater
  • San Luis Rey Water Transfer
  • Potable Reuse

Increasing Local Supplies

The Water Authority also collaborates with its 22 member agencies to develop local supplies such as groundwater and recycled water. The next big local supply will come from water purification projects that are under development across the region.

In 2020, about two-thirds of the region’s water supplies are from the Colorado River, about 20 percent is from local sources and the rest is from the Northern California. Regardless of the source, all the water delivered to homes and businesses across the region meets strict state and federal quality standards.

Want to dig deeper and learn more?
download this documentWater Supply Fact Sheet

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