Last month California Gov. Jerry Brown sounded the alarm when he mandated strict regulations  on water usage across the state.
That kind of water belt-tightening is nothing new to San Diego. County residents had already been called on to shorten showers and reduce watering outside.
But it’s with good reason.
Across the county, enough water is being used to fill a third of Mount Everest, or enough to fill 300,000 Olympic-sized swimming pools.
So where does all the water go ?
Ry Rivard and NBC 7’s Catherine Garcia follow the flow on this San Diego Explained .