The Upper San Gabriel Valley Municipal Water District declared a water supply emergency Wednesday amid record-low levels.
The agency, which supplies retailers that serve several San Gabriel Valley cities, said levels will continue to drop if this winter doesn’t provide above-average rainfall and if the Metropolitan Water District of Southern California doesn’t provide significant water to replenish groundwater.
Groundwater levels could drop an additional 20 feet or more without water deliveries and if this winter is as dry as last year’s.
The Upper San Gabriel Valley Municipal Water District serves nearly 1 million people, and more than 78 billion gallons of water a year is used in its service area.