I track my water usage since moving in and have been reporting it in my energy use tracking thread.
https://docs.google.com/spreadsheet/...WdoNUViZjlLbnc
this is a link directly to the spreadsheet with the nice graphs.
Basically I averaged 103 gallons/day last year. it drops to 77 gallons/day when you remove the summer watering season.
<edit> I was getting depressed wondering how we're above average use until I noticed that was per capita. we're a family of 4 - 2 adults, a 4 year old(potty trained) and a 2 year old. so 25 gallons/day yearly 19gallons/day non watering season. </edit>