Water Education Foundation

South Lake Tahoe

South Lake Tahoe gets its water from these sources.
Click any icon to read about watersource types.

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Groundwater

Groundwater

About 30 percent of California's total annual water supply comes from groundwater in normal years, and up to 60 percent in drought years. Local communities' usage may be different; many areas rely exclusively on groundwater while others use only surface water supplies. Contrary to popular opinion, groundwater does not exist in underground lakes. Groundwater fills pores (spaces) between sand, gravel, silt and clay in water-bearing formations known as aquifers.