For most, washing a car consumes quite a bit of water. However, the Barton Springs/Edwards Aquifer Conservation District conducted a study to determine the exact amount of gallons used for washing nine cars. Depending on your "car washing conscience," you might even use less water than you would think.
The District used water meters to test gallons used per car. Check out the full article and complete newsletter by clicking on the link below.
BSEACD 2012 Newsletter