[cykros]

I suspect it likely could be if you're spraying everything to rinse it; use a few basins with a good sized rinse with sanitizer or bleach (measured -- ideally use a ph strip to avoid going too far here) and you can use quite a small amount of water for a good number of dishes. Of course, bothering to fill the basins for only a few dishes could be a waste, but when you're doing a whole family worth, you shouldn't need to run the sink while you're cleaning.