Run full dishwasher loads.
You'll save up to 20 gallons of water per load, or 7,300 gallons a year. That's as
much water as the average person drinks in a lifetime.
You can save even more money by running your dishwasher during off-peak hours, usually from 9 p.m. to 7 a.m. Many utility companies offer off-peak energy rates. And don't pre-rinse if your dishwasher can handle it.