The Task: Water your lawn in the early morning or evening.
Why It's Worth It: If you irrigate in the middle of the day, evaporation prevents 14 percent of the water from reaching the plants’ roots. Watering the lawn in the early morning or evening can save the typical home owner 87 gallons a week.
Your One-Year Effect: 4,524 gallons of water saved.
The Effect If Every Household in the U.S. Did It for One Year: Equal to nine times the annual rainfall in Seattle.

The Task: Water your lawn with a hose, not a sprinkler.
Why It's Worth It: The average single-family home pours at least 25,000 gallons of water a year on the lawn — more than double the amount used inside. People are smarter than automatic sprinklers: Watering with a hose is at least twice as efficient.
Your One-Year Effect: 12,500 gallons of water saved.
The Effect If Every Household in the U.S. Did It for One Year: Equal to the volume of water in Shasta Lake, in northern California.

The Task: Install faucet aerators.
Why It's Worth It: Faucets account for 15 percent of indoor water use and typically flow at twice the rate they should. Installing aerators in kitchen and bathroom sinks fixes this problem for only a dollar or two per sink.
Your One-Year Effect: 1,000 gallons of water saved.
The Effect If Every Household in the U.S. Did It for One Year: Equal to the 10-day water supply for New York City.