Toilet

Five

Conventional toilet

3.5 – 5 gallons per flush

17.5 – 25

Low-flow toilet

1.6 gallons per flush

8

High-efficiency toilet

1.28 gallons per flush

6.4

Ultra-high-efficiency toilet

.8 gallons per flush

4

Shower

One (8 minutes long)

Pre-1993 showerhead

3 – 8 gallons per minute

24 – 64

Standard showerhead

2.5 gallons per minute

20

Low-flow showerhead

1.5 gallons per minute

12

Bath

Once

Tub 1/4 to 1/3 full

7.5 – 15 gallons

7.5 – 15

Full tub

30 – 45 gallons

30 – 45

Shaving

Once

1 full basin

1 gallon

1

Running water, five minutes

2.2 gallons per minute

11

Brushing teeth

Twice

Brush and rinse

0.25 – 0.5 gallon

0.5 – 1

Running water, two minutes

2.2 gallons per minute

4.4

Hand washing

Seven (15 seconds)

Standard aerator

2.2 gallons per minute

7.7

Low-flow aerator

0.5 gallon per minute

0.875

Cooking

Washing produce

One full kitchen basin

1 – 2 gallons

1 – 2

Dishwasher

Once – full load

Water-conserving model

4.5 – 7 gallons

4.5 – 7

Standard cycle

10 – 14 gallons

10 – 14

Dishwashing by hand

Once

Full basin/wash and rinse

2 – 4 gallons

2 – 4

Running water, five minutes

2.2 gallons per minute

11

Laundry

Once

Front-load washer

13 – 20 gallons/load

13 – 20

Conventional top-loader

35 – 50 gallons/load

35 – 50

Car washing

Once

Five full two-gallon buckets

10 gallons/wash

10

Hose for 5 minutes

5/8-inch hose

32

Lawn watering

During hot dry spells, Kentucky bluegrass needs ¾ of an inch of water twice a week, turf-type tall fescue needs ½ to ¾ of an inch of water twice a week, and buffalo grass needs ½ to ¾ of an inch every other week.