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This homework is related with your personal water footprint. These figures are estimates. There is a tremendous amount of variation among people’s life styles and how they use water. For example, if you have a water-efficient toilet the water used per flush will be as low as 1.5-2 gallons per flush. The amount of water used for tooth brushing, shaving, hand and face washing, and dishwashing will vary significantly based on the time spent and the faucet setting. The amount of water used on yard will vary depending on the area in need of water. If you are living in a multi-unit apartment or dorm, estimate your fair share.