Some of the largest brewers in the U.S. are trying to reduce their water-to-beer ratio as drought and wildfire threaten the watersheds where they draw billions of gallons every year.
No independent group tracks beer-makers' water usage, but MillerCoors and Anheuser-Busch both say they have made reductions.
MillerCoors released a sustainability report Wednesday that shows it has cut its water use by 9.2 percent from 2012.
MillerCoors is focusing its water-saving effort in Texas, California and Colorado. It involves changing irrigation techniques used by its hops and barley farmers
The Chicago-based company's sustainability chief, Kim Marotta, says MillerCoors realized in 2008 that three of its eight breweries relied on water in the three states, where supplies were already stretched.