Use low-flow water devices.
Wherever you use water, there's a low-flow device to fit it -- from hose nozzles, to showerheads, to faucet aerators. Handy products, such as the WaterMiser Waterbroom, use water and air pressure to remove dirt from outdoor surfaces, reducing water use by up to 60 percent. Low-flow nozzles save about 5 gallons a minute for a standard garden hose, and a low-flow showerhead uses as little as 2.5 gallons of water or less each minute and would save 25 gallons of water per 10-minute shower. Toilets made after 1996 use no more than 1.6 gallons per flush, while earlier versions can use from 3.5 to 7 gallons.
Low-flow hose nozzles cost less than $20; showerheads cost about $12 at home-improvement stores. Low-flow items can save you about 750 gallons of water each month per person in showers alone. They also cut your hot-water heating bills by up to 50 percent. New toilets -- from as little as $100 -- can reduce water use by up to 73 percent per flush. An even cheaper tactic: Put a water displacement bag -- about $2 -- or even a 2-liter plastic bottle filled with water in the tank away from the mechanism and you'll save almost a gallon of water per flush. Faucet aerators cost about $2 each and can cut water use from as much as 2.75 gallons per minute to as little as half a gallon a minute. Households using low-flow aerators save an average of 1,700 gallons of water each year