Diamond Valley

Reservoir Levels Weather Hydrology

Diamond Valley Lake in California was created in 1999, and is the largest reservoir in Southern California. The lake is primarily used for municipal drinking water, but it also provides recreational opportunities, such as fishing and boating. The hydrology of the lake is largely dependent on surface flow and snowpack from the San Jacinto Mountains. The lake is managed by the Metropolitan Water District of Southern California, who also operate the Robert B. Diemer Water Treatment Plant. Surrounding the lake is the Diamond Valley Lake Marina, a recreational area that offers fishing, boating, and hiking. In addition, a portion of the surrounding land is used for agricultural purposes, with crops such as grapes and citrus being grown in the area. Overall, Diamond Valley Lake plays a significant role in providing water and recreational opportunities for Southern California.

June 15, 2024







Storage 24hr Change 0.03%
Percent of Normal 118%
Minimum 299,638 acre-ft
Maximum 809,458 acre-ft
Average 623,716 acre-ft
Dam_Height 22
Hydraulic_Height 16.5
Drainage_Area 0.13
Year_Completed 1999
Nid_Storage 500
River_Or_Stream Domenigoni Val Can
Surface_Area 31
Hazard_Potential Low
Dam_Length 4482
Primary_Dam_Type Earth
Nid_Height 22

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Cubic Feet Per Second


Cubic Feet Per Second


Cubic Feet Per Second


Cubic Feet Per Second

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