Water Sources

Long Beach receives its drinking (potable) water supply from two main sources, groundwater and imported water.
Roughly 60 percent of the Long Beach water supply is local groundwater.
The rest of the City’s drinking water comes from two imported water sources: the Colorado River, via the 242-mile Colorado River Aqueduct and Northern California’s Bay-Delta region, via the 441-mile California Aqueduct.
The Metropolitan Water District of Southern California (MWD), our water wholesaler, is responsible for bringing these imported water sources into Southern California.
Long Beach Water Sources
Source / LocationPercent

Local Ground Water


Colorado River


Northern California’s Bay-Delta


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Water & Sewer System Design Guidelines