Which conserves more water? Well, one must take many factors into account.

Unfortunately I do not have the luxury of using a dishwater in my current apartment, although when I did have one, it was used more as a storage device for dirty dishes. I would put everything in the dishwasher and once I had time to begin my cleaning routine (I’m a bit OCD when it comes to cleaning–hence the cleaning “routine”) I would take the items that could not be washed out (wooden spoons, bamboo cutting board, knives) and hand wash them while staying conservative of my water usage.

But before we can determine which is method is more efficient and eco-friendly, according to recycling.com, we must first look at a few factors.

1- RESOURCES

MACHINE WASHING: What goes into making a dishwasher? Is your dishwasher made from recycled parts? Was it produced in a sustainable manner? Can your dishwasher be recycled when you are finished with it, or when it is broken beyond repair?  (Here is a good resource to help you find a place to recycle an old dishwasher.)

HAND WASHING: Requires hands, water, soap and a sink. Simple.

2- WATER

MACHINE WASHING: First, find out how old your dishwasher is. As a general rule, the older the model, the more water it uses.

The EPA’s water trivia facts (updated in 2007) claims that hand washers use 9 to 20 gallons of water while the average dishwasher uses 9 to 12 gallons of water. Judging by the fact that Energy Star dishwashers must use 5.8 gallons of water or less per cycle to receive certification, these numbers seem fairly accurate. But, since hand washers can have such different ways of washing, it is hard to estimate this figure.

HAND WASHING: The most proficient way to hand wash dishes is by filling your sink with soapy warm water, soaking the dishes and either using a second sink (or bucket/large bowl) with cold water to rinse the dishes. You can use a drying rack, wipe dishes dry or use your dishwasher as a drying rack.

3- ENERGY

While hand washing dishes requires energy if you are using hot water, running a dishwasher uses energy to operate and to heat water. To use less energy to heat water, lower your water heater’s temperature a few degrees.

According to the U.S. Department of Energy, average dishwashers use about 650 kWh (kilowatt hours) per year  or an estimate of 0.558 kWh during each cycle. If you run your dishwasher every other day (about 182 times a year), that’s about 102 kWh per year.

CONCLUSION: Each case is different, but hand washing while keeping the water running is clearly going to use more water than a dishwasher. If you are conservative and wash dishes in a sink full of soapy water, you could be using less water than your dishwasher. Many factors must be taken into consideration when clearing determining between the two options, including how often you’re washing dishes by hand, whether you pre-rinse dishes before loading them into the dishwasher, whether you’re running a full load, whether your dishwasher itself is sustainable (or more so than most) and whether you are using the heated dry option on your dishwasher.  The hand washing versus dishwashing feud cannot be answered in terms of black and white.

(Semi-)CONCLUSION:

Although comparing hand washing and dishwashing is difficult, I am sure we can agree on several things to stay more efficient and more eco-friendly. If you do use the dishwasher, make sure you always run a full load, skip the heated dry option and air dry dishes, refrain from needless pre-rinsing and try to upgrade to a more efficient model (if you have not already). Just try and use less. Try using fewer items in general, such as reusing your cups throughout the day or wiping breadcrumbs off the plate that only carried a sandwich and popping it back in the cabinet.

(via 1800recycling)

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Comments

Comments

  1. November 12, 2010 at 8:09 am, Daisy Riede wrote:

    Good blog! Awesome insight on this issue. Most definitely the latest bookmark.

  2. January 5, 2011 at 11:46 pm, Lanny Schwery wrote:

    Fantastic story:) Will take a bit of time to think about the site..

  3. January 16, 2011 at 9:58 am, Praca wrote:

    Extremely wonderful site. Thank you for this article. It makes things obvious

  4. January 18, 2011 at 6:32 am, Arnulfo Katzenbach wrote:

    There is obviously a lot to know about this. I think you made some good points in Features also.Keep working ,great job!

  5. February 18, 2011 at 11:10 am, Barbara Burkett wrote:

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  6. June 3, 2011 at 8:49 am, Conversion Jeneva Sutten wrote:

    Useful post, this is. It is actually awesome to come across a post that is helpful.

  7. February 27, 2012 at 3:09 pm, log furniture plans wrote:

    I don’t write many responses, however i did some searching and wound up here Inspired Water : Dishwasher vs Hand Washing: Which is Greener?. And I actually do have a couple of questions for you if it’s allright. Is it simply me or does it seem like some of the responses look as if they are left by brain dead visitors? :-P And, if you are writing at additional online social sites, I’d like to keep up with anything fresh you have to post. Could you list of the complete urls of your shared pages like your twitter feed, Facebook page or linkedin profile?

  8. February 27, 2012 at 3:30 pm, admin wrote:

    Hi there. Thank you for your interest in the site and in following us. You can follow us on Twitter at @inspiredwater and also, can interact with us on Facebook at http://www.facebook.com/maveainspiredwater. Look forward to speaking. All the best!

  9. March 17, 2012 at 8:49 pm, Jess wrote:

    I wash dishes by hand. It is therapeutic . I washed dishes using the Hobart monsters for four years while in college…

  10. June 12, 2012 at 1:05 am, confused wrote:

    I have a very dumb question. I read that most of today’s energy star dishwashers use ~4Gallons of water per cycle. I looked at the specs of several dishwashers and they specify 6 cycles per load. I don’t know what each cycle does, but assuming half of those cycles use water, it would use at least 12 gallons of water per load. That is definitely more water than what I would use for hand washing.
    What am I missing?


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