You'd better be careful--you never know when someone from the water company is monitoring forums to catch potential offenders!
We had a water ban too, last summer, because of drought conditions. We're on a well, though, and I watered in the early morning. There really isn't anyone around during the day on weekdays to look for offenders. Never had a problem, and the well never went dry.
Water is becoming a serious issue here, with all the development going on. At some point it will become a crisis.
Craig Cowing