NCGA has a wealth of information when it comes to the use of water in corn and ethanol, and one of the factoids we use is that the average-size ethanol plant uses about as much water as a municipal golf course.
Regarding this subject, I found this recent article from the Minnesota Corn Growers Association made a good point.
The ethanol industry used two billion gallons of water last year. The Environmental Quality Board has organized an Ethanol Work Group because that use rate may rise to five billion gallons. Golf courses utilized 5.6 billion gallons of groundwater in 2005. Isn’t it natural to ask: where is the Golf Course Work Group?
How much water have you seen wasted at golf courses or, worse, in landscaped areas that are set on timed sprinklers that go off even when it rains?