some more numbers from a study done in 2005 about the econmic impact, and other issues, of golf courses inAZ.
The 338 facilities use a total of 47,590,132,000 gals. per yr. for irrigation purposes.
20,078,666,000 gals. are ground water
18,263,172,000 gals. are reclaimed
7,540,054,000 gals are from the Colorado River
1,708,566,000 gals. are surface water.
Removing the reclaimed and rain waters from the totals and dividing that by an average use of 20,000 gals per person/per yr.(55gals/day) yields 1,380,000, the equivalent number of people who could be served if there were no golf courses in AZ.