If your toilet is from 1992 or earlier, you probably have an inefficient model that uses between 3.5 to 7 gallons per flush. Newer, high-efficiency toilets use less than 1.3 gallons per flush.
Older showerheads can use 3 gallons per minute or more. New, efficient models use 2 gallons per minute or less. A family of four using low-flow showerheads instead of full-flow models can save about 20,000 gallons of water per year.
Letting your faucet run for 5 minutes uses about as much energy as a 60-watt lightbulb consumes in 14 hours.
A full bathtub requires about 70 gallons of water, while taking a 5-minute shower uses only 10 to 25 gallons.