The report from UC Irvine’s Center for Hydrologic Modeling is an update to a 2011 study which showed the basins lost nearly as much water as the volume of Lake Mead over a seven year period.
The new report finds water storage in the last two years continues to plummet, and the study doesn’t even include the most recent dry winter.
Report author Jay Famiglietti says the amount of water lost is equal to the water used by all of California’s urban areas each year. Most of the loss is due to groundwater withdrawals.
Famiglietti says groundwater levels drop faster during drought than they can be replenished during wet periods.
“This is a worse than ever situation," says Famiglietti. "So we really have to watch what’s going to happen with the groundwater. It’s been bad in the past during drought periods and now with a zero surface water allocation I’m quite concerned that it will be terrible in the future.”
California has received less than 60 percent of the rain and snow this water year that it normally gets. Water managers are warning the new water year may be just as bad.
New motors, screens, and some casing repairs are in the works for eight of Sacramento's water wells. Some of the wells are more than 400-feet deep.
A long-range U.S. government forecast shows the drought in California will stick around.
The drought has farmers cutting back on watering, but some San Joaquin County growers say less water can mean a better crop.
The City of Sacramento Department of Utilities reports Friday that city water customers saved more than one-billion gallons of water last month.