"Beer has to have water," said Luis Cayo, general manager for the Anheuser-Busch brewery in Los Angeles, which has survived many droughts over the last 60 years. "The amount of water in a standard can of beer is about 92 percent." This drought, however, is the most severe on record, and there's no end in sight. Agriculture operations and manufacturers across California are drilling deeper, paying more, and competing with each other and with residents for water. But in the brewing business, it's not just the water going into the cans. It's the water used to clean tanks.