SACRAMENTO - Water use across the state is down from 2005 through 2010. In a new study released by the U.S. Geological Survey and the California Water Science Center, in 2010 Californians withdrew 38 billion gallons of water each day, compared to 46 billion gallons in 2005.
The state's largest reservoir Lake Shasta can be drained once every 40 days.
According to the USGS, California uses more water than any other state. Water use in the state is broken into four categories:
- About 61 percent of water use is for irrigation, which applies to crop and pasture growth, and maintaining vegetation on parks and golf courses -- using 23,056 million gallons of water per day.
- About 17 percent of water use is to create thermoelectric power -- using 6,601 million gallons per day.
- About 17 percent of water us is for the public supply -- using 6,307 million gallons per day.
- About 3 percent of water use is for industrial use, mining, livestock, and self-supply domestic withdraws.
San Diego, Los Angeles, San Luis Obispo, Tulare and Fresno counties use the majority of water at 2,501 to 3,100 gallons of water daily.
The following is a breakdown of water withdraws from the Central Valley:
- San Joaquin and Stanislaus counties: 1,250.1 and 2,000 million gallons per day
- Colusa and Yolo counties: 750.1 and 1,000 million gallons per day
- Sacramento and Sutter counties: 500.0 and 750 million gallons per day
On average, each Californian uses 181 gallons of water each day.