As one of the more substantial appliances in many households, the dishwasher might seem like it would use large quantities of water every time it runs. However, modern designs, improved energy ratings, and clever wash cycles have transformed the humble dishwasher into one of the most water-efficient ways to clean your plates, cutlery, and cookware. Not only can an efficient dishwasher help you save precious resources, but it can also lower your utility bills in the long run.
Below, we’ll explore just how much water a dishwasher uses, discuss the benefits of switching to a rated dishwasher, and tackle some common questions about whether dishwashers are truly better than washing dishes by hand.
Understanding Water Usage in Dishwashers
Average Water Usage Per Cycle
Dishwashers vary significantly in their water usage, primarily depending on their energy star rating (or similar certification) and age. Older models might use anywhere from 20 to 27 gallons of water per load (around 75 to 102 litres), while newer energy-efficient dishwashers often use as little as 10 litres of water per cycle. This difference is the result of technological advancements, smarter cycle settings, and more efficient designs.
Why the Big Difference?
- Improved Spray Arm Technology: More recent dishwashers have sophisticated spray arms that distribute water more effectively.
- Optimised Wash Cycles: Modern dishwashers offer multiple programmes, including eco-settings that use lower temperatures and reduced water during each wash cycle.
- Efficient Detergents: Pairing your dishwasher with specialised detergents, such as dishwashing detergent sheets, can also help reduce overall water requirements.
Do Dishwashers Use a Lot of Water?
It’s a common misconception that dishwashers are water guzzlers. In reality, studies suggest that using a certified dishwasher can be more water-efficient than washing your dishes by hand—especially if you’re prone to running the tap continuously. Recent Australian testing found that using a 2.5-star rated 12-place setting dishwasher in an eco programme can save a notable amount of water compared to handwashing. Furthermore, skipping pre-rinsing can conserve up to 40 litres of water per load, without compromising on cleanliness.
According to some comparisons, by using a dishwasher instead of handwashing, you can save up to 200 litres of water per week (based on washing 132 items four times a week on an eco cycle versus washing the same amount by hand). Over time, these savings add up, giving you a compelling reason to trust your dishwasher for everyday cleaning.
Is It Cheaper to Run a Dishwasher or Wash by Hand?
Energy and Water Costs
While a dishwasher does use electricity to heat hot water and run its pump, a well-maintained, energy star (or similarly rated dishwasher) can often be more economical in the long term—particularly if you always wait for a full load and skip the pre rinse. Handwashing under a running tap can lead to far greater water usage, not to mention the time and effort involved.
Maintenance Tips to Lower Costs
- Clean the Sprayer: Make sure the dishwasher’s spray arms aren’t blocked by food residue or obstacles. This ensures it operates at maximum water efficiency.
- Choose the Right Cycle: Eco or quick cycles typically use lower wash temperatures and less water per cycle.
- Load Correctly: Place dishes facing the spray arms, ensuring each surface is exposed. This minimises the need for extra or extended wash cycles.
What Uses Less Water, the Dishwasher or By Hand?
When looking purely at water usage, a modern, energy-efficient dishwasher almost always triumphs over handwashing—provided you use it correctly. Handwashing dishes under a continuous stream can consume around 27 gallons of water or more if you’re not careful (roughly 100 litres) in a single session. In contrast, an average dishwasher with a good energy star rating will typically use far less, especially on a carefully selected wash programme.
A dishwasher’s advantage lies in how it recirculates water for repeated use throughout the cycle, targeting grime with high-pressure sprays. In contrast, washing by hand often involves rinsing multiple times with fresh water, leading to higher overall consumption. If you prefer to wash smaller loads by hand, consider filling the sink or a washing-up bowl instead of allowing the tap to run.
Tips to Improve Water Efficiency
- Skip Pre-Rinse: Most modern dishwashers are designed to handle a bit of residue, so you can usually scrape food into the bin and place dishes straight in—skipping the unnecessary water wastage.
- Run Full Loads: Maximise each cycle by running your dishwasher only when it’s fully loaded. This ensures every litre of water is used efficiently.
- Choose an Eco-Mode: Many efficient dishwashers come with eco-friendly settings that reduce water and energy consumption.
- Keep Your Dishwasher Clean: Regularly inspect and clean filters, as a clogged filter can increase water use and reduce cleaning performance.
Discover an Eco-Friendly Dishwashing Solution
Want to boost your dishwasher’s efficiency and lighten your environmental footprint? Consider upgrading your detergent routine with dishwashing detergent sheets. These handy, pre-measured sheets eliminate the need for messy powders or liquids, ensuring that each cycle uses just the right amount of cleaning power. They dissolve quickly and rinse away easily, further contributing to your dishwasher’s overall water efficiency.
One Simple Switch for an Effortless and Eco-Friendly Clean
If you’re looking for a straightforward way to enhance your dishwashing experience,check out Pure Suds Dishwashing Sheets: Effortless, Eco-Friendly Clean. Specially designed for Australian mums seeking a hassle-free yet effective washing solution, Pure Suds Dishwashing Sheets help you enjoy sparkling dishes without sacrificing the environment. Formulated with plant-derived ingredients in biodegradable packaging, these sheets save you from the mess of measuring powders or liquids. Their gentle, hypoallergenic formula protects sensitive skin while delivering a refreshing natural lemon scent—an ideal choice for any modern, eco-conscious household.
In Conclusion
Modern dishwashers are surprisingly water-efficient. When used correctly—skipping pre-rinse, choosing an eco-friendly cycle, and waiting for a full load—they can reduce your household’s overall water consumption and save you money in the process. So, do dishwashers use a lot of water? With the latest technology, the answer is: not really. In fact, they can help you conserve resources while delivering consistently clean dishes. And as for whether it’s cheaper to run a dishwasher or wash by hand, the efficient design of today’s dishwashers often makes them more economical, especially in homes that process large quantities of dishes.
By taking small steps like cleaning your dishwasher regularly, avoiding pre rinse, and investing in energy star (or equivalent) certified dishwashers, you’ll be well on your way to an eco-friendly kitchen routine. Pair your dishwasher with water-conscious habits, and you’ll discover just how much time, energy, and water you can save every week.
