There are four major factors that drive the Long Beach water supply. About 40 percent of the City's water comes from local groundwater in Long Beach. The local groundwater originates from the San Gabriel mountains to the north, travelling down the San Gabriel River watershed and slowly making its way underground to our City. High-powered pumps extract groundwater from Department-owned wells, most of which exceed 1,000 feet in depth. The Department currently has 28 active groundwater wells.
Roughly a quarter of our City's supply is imported water purchased from the Metropolitan Water District of Southern California (MWD). MWD water comes from the Colorado River through the District's aqueduct system and from the Sacramento River/San Joaquin Delta via the State Water Project. It is then treated in five regional MWD treatment plants.
Approximately seven percent of the water supply is tertiary treated reclaimed water from the Sanitation Districts of Los Angeles County Long Beach Reclamation Plant.
The remainder of the water supply portfolio is satisfied through water conservation, which allows the department to purchase less imported water, improving reliability and keeping water rates low.