Water resources in California are in increasingly short supply due to our natural geography, climate and water usage levels. As Southern California population grew rapidly following World War II the demands for water began to exceed the natural supply and it became clear that we had to devise new ways to replenish the aquifer underlying our communities.
Thoughtful planning and engineering resulted in a State Water Project that now brings water from northern California to southern California. The San Gabriel Valley Municipal Water District operates under the laws of California with respect to how much water we are authorized to take each year from the State Water Project to replace water that has been pumped from the aquifer below our communities. We also are part of the San Gabriel Valley Watermaster, which each year determines what our communities can safely extract from the aquifer and how much replacement water is required to offset over-pumpage.
As replacement or supplemental water is ordered from the State Water Project, it is channeled through our pipeline and system of turnouts to the many Spreading Grounds operated and maintained by the Los Angeles County Department of Public Works. That water then becomes available to our member cities.
The San Gabriel Valley Municipal Water District provides reliable supplemental water for the communities of Alhambra, Azusa, Monterey Park and the Sierra Madre in a cost-effective and environmentally responsible manner.
The Water District procures water from the state water project that is used to supplement groundwater supplies in its four member cities.