What uses more water, a dishwasher or washing dishes by hand?
The average dishwasher uses 10 to 15 gallons of water per load, while washing dishes by hand can use up to 20 gallons, about 2 gallons for every minute you allow the water to run. Washing full loads of dishes only in the dishwasher is the best solution, assuming that you avoid lengthy rinsing of dishes while loading the dishwasher.