How much water gets wasted every day in America?



  1. 0 Votes

    This is from Alexander Levy’s science fair project. He is 7yrs old and lives in Hawaii.

    If everyone in the country repaired the water leaks around their homes, we could save over 200 BILLION GALLONS EACH YEAR.  To answer it in days, divide by 365. (about 1/2 billion gallons a day)

        How Much Water Are We Wasting by Not Fixing Leaks?

    By Alexander Levy


     INTRODUCTION:    According to across America, freshwater supplies are becoming scarce and water efficiency is needed as never before. Examples are all around us: An epic drought in Georgia threatens the water supply for millions. Florida doesn’t have nearly enough water for its expected population boom. The Great Lakes are shrinking. Upstate New York’s reservoirs have dropped to record lows. And in the West, the Sierra Nevada snowpack is melting faster each year. According to, the State of California uses almost 7% of its energy to pump and treat water. So, saving water also saves energy. Saving energy helps prevent global warming. Here at home, according to the Honolulu Board of Water Supply at, our primary source of drinking water is groundwater: fresh water, filtered through mountain watersheds and held within the porous volcanic rock of the island. Our island water supply is a precious resource that requires our care and concern. To extend the life of this precious resource, we need to be more conscious of water conservation practices in our everyday lives. Leaks are the biggest water waster. A leak of one drop per second wastes 2,400 gallons of water per year! I decided to try to figure out how much water we could save by repairing the leaks around our homes.


    PROBLEM:  Water is necessary for all life. It is a valuable and limited resource. How can we figure out how much water we can save by repairing leaks around our homes?


    HYPOTHESIS: If I measure the amount of water that is being wasted by leaks in the homes near mine in one minute, I can estimate how much is being wasted in the entire City, Island, State, and Country every year. To get the most accurate results, I would have to check every single home for the whole year. By assuming that the other homes not measured would be similar to the ones that I do measure, knowing how many homes are, and assuming that the leaks that I find in one minute continue for the next year, I can estimate how much is being wasted by all the homes in a year.


    METHOD: Honolulu Board of Water Supply at described how to check a water meter for leaks I went to 10 houses checking their water meters. I wrote down how much the 1/100 gallon meter moved in 60 seconds. 


    My data



    Water wasted (in gallons/minute) 

    224 Lumahai Place


    230 Lumahai Place


    236 Lumahai Place


    242 Lumahai Place


    245 Lumahai Place


    248 Lumahai Place


    251Lumahai Place


    252 Lumahai Place


    253 Lumahai Place


    254 Lumahai Place




    RESULTS:   Add the 10 results together and divide by 10. The average house leaked 0.0034 gallons/minute. So, the average house in my study leaks  0.0034 gallons/minute X 60 minutes/hour    X  24 hours/day x 365 days /year = 1787 gallons /year. Multiply that by the number of household in a given location to find the amount of water wasted by household leaks in a year.




    # of households

    Water leaked/year



    284,000,000 gallons



    598,000,000 gallons



    901,000,000 gallons



    229,000,000,000 gallons


    The number of households came from the 2007 Census at


    CONCLUSION: If everyone in the country repaired the water leaks around their homes, we could save over 200 BILLION GALLONS EACH YEAR.


    DISCUSSION: Six of the houses did not have leaks. I told the other four neighbors about their leaks and gave them blue dye tablets to check their toilets for leaks. These are available for free at City Mill. If I could check more houses, my results would be more accurate. For future year science projects, I plan to get classmates or friends to each check  10 houses, or will try to find kids around the country or the world to each check 10 houses and give me the results. If every child in the country checked 10 houses, we could find and fix all these leaks and save all this water.



    • 0 Votes

      To contact Alex (though his dad), e mail
      He will need colaborators for the next part of his project (for next years science fair.
      Also, his answer 1/4 trillion gallons a year, is close to the EPA posted estimate of 1 trillion Gallons a year. I cannot find out how the EPA came up with their figure.
      Alex’s Dad

  2. 0 Votes

    While the figures above do shed some light on the issue, it is tough to say just how much water is “wasted” every day. Yes, Americans do waste a great deal of water every day however it seems impossible to say how much of that water is used wastefully and how much is used for practical and/or necessary purposes. 

  3. 0 Votes

    “Between 1950 and 2000, the U.S. population nearly doubled. However, in that same period, public demand for water more than tripled! Americans now use an average of 100 gallons of water each day — enough to fill 1,600 drinking glasses!” –> Now that is a riduclous amount.  I am not a fan of wasting water, and believe it is something that is taken for granted by many of us, including myself sometimes. 

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