Indoor Water Use in
the United States
Americans use large quantities of water inside
their homes. A family of four can use 400 gal-
lons of water every day, and, on average,
approximately 70 percent of that water is used
indoors.
The bathroom is the largest consumer of indoor water.
The toilet alone can use 27 percent of household
water. Almost every activity or daily routine that hap-
pens in the home bathroom uses a large quantity of
water. For example:
• Older toilets use between 3.5 and 7 gallons of
water per flush. However, WaterSense8 labeled
toilets require 75 to 80 percent less water.
• A leaky toilet can waste about 200 gallons of
water every day.
• A bathroom faucet generally runs at 2 gallons of
water per minute. By turning off the tap while
brushing your teeth or shaving, a person can save
more than 200 gallons of water per month.
Outside the bathroom, there are many opportunities
to save water. Here are some common water efficiency
measures, along with a few solutions to those prob-
lems you may not have known existed:
• High-efficiency washing machines can conserve
large amounts of water. Traditional models use
between 27 and 54 gallons of water per load, but
new, energy- and water-conserving models (front-
loading or top-loading, non-agitator ones) use less
than 27 gallons per load.
How Much Water Do We Use?
Shower
16.8%
Faucet
15.7%
Toilet
26.7%
Leaks
13.7%
Clothes washer
21.7%
Other
5.3%
Source: American Water Works Association Research Foundation, "Residential End Uses
ofWater,"1999
• Washing the dishes with an open tap can use up
to 20 gallons of water, but filling the sink or a bowl
and closing the tap saves 10 of those gallons.
• Keeping a pitcher of water in the refrigerator saves
time and water instead of running the tap until it
gets cold.
• Not rinsing dishes prior to loading the dishwasher
could save up to 10 gallons per load.
WaterSense, a partnership program sponsored by the
U.S. Environmental Protection Agency, seeks to help
families and businesses realize that they can reduce
water use by 20 to 30 percent by doing just a few sim-
ple things, such as upgrading to higher quality, more
efficient products. For more information, visit
.
July 2007
(866) WTR-SENS (987-7367) • www.epa.gov/watersense • watersense@epa.gov
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