Arizona may be facing its first official declaration of water shortage next year, a move that would trigger water cutbacks of 512,000 acre-feet — almost 20% of Arizona’s Colorado River entitlement — affecting mainly agricultural users. 

The 24-Month Study on the Colorado River system, released this month by the Bureau of Reclamation, projects that in June water levels in Lake Mead will fall below 1,075 feet for the first time, which would put the state in a Tier 1 shortage.