After living in a van for part of the summer I'm downright embarrassed by how much water we use in a normal lifestyle. Vandwelling was maybe 2 gallons of directly accountable consumption per person per day, but that's because it doesn't count stopping to use the bathroom at rest stops or something. Still, if I'm in the backcountry I use 1 gallon per day MAX, and can do so for up to about a week at a time.
After that experience I take showers every other day now. I've also grown to believe that water consumption person-to-person is hard to compare because different people count different things towards their consumption. For instance, I'm in an apartment now with shared washers and dryers so I don't/can't count the water used by the washing machine in my totals. This is just like living on the road and not counting the water consumed from the rest stop.
