The Joseph Jensen Treatment Plant in Granada Hills is one of
five water treatment plants in the Metropolitan Water District
system. Jensen sits high in the foothills of the Santa Susana
Mountains at the northwest end of the San Fernando Valley. Its
1,290-foot elevation enables the plant to distribute to points
within the valley, to Ventura County and south to West Los
Angeles, Santa Monica and the Palos Verdes Peninsula. From
Mountain High... The water filtered through this plant
originates in northern California's mountains, rivers and
streams, and flows through the Sacramento-San Joaquin Delta
before entering the State Water Project's 444-mile California
Aqueduct. Jensen is the only facility that does not treat water
that comes from the Colorado River and through Metropolitan's
242-mile Colorado River Aqueduct. Thanks to a multimillion-
dollar expansion project,. Jensen is believed to be the largest
treatment plant west of the Mississippi River, delivering up to
750 million gallons per day. This means the pl