Switching to a WaterSense aerator or bathroom faucet will automatically mean that you will use 20% less water each time you turn on the faucet.

Installing an aerator - a simple device you screw on to the tip of your sink's faucet - can be one of the most cost-effective water conservation measures you can take. Aerators cost about a buck, and in most cases, take less than a minute to install. Be sure to look for the WaterSense label when replacing your aerator or installing a new bathroom faucet. 

Many water providers give low-flow aerators out to their customers for free, or you can purchase one at most home improvement stores for about $1-5.00 each. 

Interesting fact: According to WaterSense, leaky faucet that drips at the rate of one drip per second can waste more than 3,000 gallons per year. A home with WaterSense labeled toilets could use that water to flush for six months!