• 5 gallons of water, on average, go down the drain if you leave the tap running while you brush your teeth
  • 30 gallons of water, on average, go down the drain if you leave the tap running while you wash dishes
  • 50 gallons of water per day can be wasted by a small faucet leak
  • 150 gallons of water, on average, are used to wash a car with a hose
  • 14 percent of the water consumed in the average American home is used to operate a washing machine
  • 75 percent of the water consumed in the average American home is used in the bathroom
  • 325 gallons of water are consumed per person per day in Las Vegas, possibly more than in any other city in the world

Sources:
1, 2 — 50 Simple Things You Can Do to Save the Earth
3 — Earth Communications Office
4-6 — 50 Simple Things You Can Do to Save the Earth
7 — USA Today