Desalination & Reuse Handbook - Flipbook - Page 18
IDA
WATER SECURITY
HANDBOOK
SOUTHERN CALIFORNIA
California’s relationship with water has undergone radical change since drought caused a state of emergency in January
2014. Against a backdrop of state legislation and public conservation, the Metropolitan Water District of Southern
California (MWD) has committed to huge infrastructure investment to secure adequate water supply for California’s
densely populated south and expand the region’s water recycling capacity to be the largest in the US.
On 10th July 2018, the MWD board committed to provide $10.8 billion of the $16.7 billion needed to fund California
WaterFix: a plan to replace the Sacramento-San Joaquin Delta’s ageing north-south water import system with an entirely
new conveyance infrastructure. The delta presently supplies 30% of Southern California’s water via vulnerable, 19th
century levees and a system of powerful pumps which cause significant damage to local ecologies. Subject to securing all
Percentage of water supply imported from MWD by agency
San Fernando
San Marino
Central Basin
San Gabriel Valley
Inland Empire
Fullerton
Anaheim
Santa Ana
Compton*
Burbank
Long Beach
San Diego
Orange County
Foothill
West Basin
Los Angeles
Pasadena
Three Valleys
Glendale
Eastern Municipality
Calleguas
Santa Monica
Riverside County
Torrance
Beverly Hills
Las Virgenes
10
0%
10%
21%
23%
25%
25%
28%
30%
30%
33%
The Metropolitan Water District of
Southern California (MWD) provides
water to 26 cities and agencies
serving a total population of 19
million. While some areas can fulfil
their water needs using local sources
(San Fernando), others depend
entirely on imported water from
MWD (Las Virgenes). Regardless of
water imported, all distributors will
be subject to the per capita usage
consumption target of 0.2 m3/d
mandated by the state legislature.
40%
40%
50%
50%
55%
57%
60%
64%
65%
75%
79%
85%
85%
89%
90%
*Estimated
Source: GWI
100%
