Images to give some background on where some of our, Bay Area, water comes from. 

The high water mark from the 1997 El Nino event, the 2016 version seems to be a bit weaker (2/15/16)

Hetch Hetchy 2/15/16

Hetch Hetchy looks to be in good shape on 2/15/16.  When full it can supply its 2.4M users with per capita Bay Area consumption(156GPD) for 10 months.  Conservation is still an urgent requirement.  

o'shaughnessy dam

O'shaughnessey Dam releasing pristine Sierra Nevada water on its way to the Bay Area.  How lucky we are to have this flow through our taps.