The bathroom faucet is the area in the bathroom where the least amount of water is used. However, standard faucet aerators can also be a significant source of water waste. The average faucet tap uses 2.2 gallons of water every minute. This is almost the equivalent of the modern showerhead, which uses 2.5 gallons per minute. Installing water saving aerators is a simple, cost effective way to reduce water use and water bills.