The amount of water a dishwasher uses per load can vary depending on the make, model, and energy efficiency of the appliance. On average, a standard dishwasher in the United States uses approximately 3 to 6 gallons of water per load. However, some newer, more energy-efficient models use as little as 2 to 4 gallons per load.
Keep in mind that the water usage can also be affected by the dishwasher's settings, the wash cycle selected, and the number of dishes being washed. Some dishwashers have eco-friendly or energy-saving modes that use less water and energy, while others have more intensive cycles for heavily soiled dishes that may use more water.
If you're concerned about water conservation, you can look for dishwashers with an Energy Star label, as these models meet specific water and energy efficiency standards set by the Environmental Protection Agency (EPA). Additionally, following best practices like only running the dishwasher when it's fully loaded and avoiding pre-rinsing dishes can also help save water and reduce overall usage.