Weather conditions and operational strategies can affect local, state and Colorado River Basin reservoir storage levels.
San Diego County’s reservoir capacity is growing thanks to investments such as the San Vicente Dam Raise. Altogether, about two dozen reservoirs in the county can hold nearly 600,000 acre-feet of water.
Each reservoir has unique characteristics that define its role as part of a larger water supply system. Some reservoirs are more important from a regional water reliability standpoint, while others are primarily used by local agencies for operational flexibility.
The San Diego region's imported water supplies include water delivered from state and Colorado River Basin reservoirs.