In an unprecedented move, Southern California’s Metropolitan Water District, the regional wholesaler that delivers water to 19 million Californians, has imposed once-weekly outdoor watering limits starting June 1. The mandatory cutbacks affects about 6 million customers. Metropolitan cited the driest-ever January-through-March period in the Sierra Nevada, which provides about one-third of Southern California water supplies. As a result of the severely dry conditions, the State Water Project has cut back its deliveries to a mere 5% of requested deliveries in normal years. The cutbacks follow a second round of cutbacks on the Colorado River announced by the U.S. Bureau of Reclamation recently, for 2022, due to worsening runoff projections into Lake Powell this spring and summer. The Colorado River is the single-largest supply source of imported water to Arizona.
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