A small drip of water from a faucet can waste 1 gallon of water every 4 hours or 6 gallons a day or 2190 gallons a year.
When buying bottled water, the label tells if the water is purified or if it is from a natural spring.

NORTH TABLE MOUNTAIN WATER AND SANITATION DISTRICT

BACK TO CONSERVATION
Table of Water Use
  ACTIVITY # OF TIMES CIRCUMSTANCES WATER USED TOTAL
BATHROOM toilet 4 flushes per day ULV Toilet 1.6 gal/flush 6 gal
Conventional Toilet 3.5 to 7 gal/flush

14 to 28 gal
shower 5 minutes once per day Low-Flow showerhead 2.5 gal/minute 12 gal
Conventional Showerhead 3 to 8 gal/minute 15 to 40 gal
bath once per day Only filling the tub 1/4 to 1/3 full 9 to 12 gal 9 to 12 gal
Using a full tub 30 to 45 gal 30 to 45 gal
shaving once per day 1 full basin 1 gal 1 gal
Using a running tap 5 to 10 gal 5 to 10 gal
brushing teeth twice per day Brush and Rinse 1/4 to 1/2 gal 1/2 to 1 gal
Using a running tap 2 to 5 gal 4 to 10 gal
hand washing twice per day 1 full basin 1 gal 2 gal
Using a running tap 2 gal 4 gal
KITCHEN cooking washing produce 1 full kitchen basin 1 to 2 gal 1 to 2 gal
Using a running tap 5 to 10 gal 5 to 10 gal
dishwasher once per day with a full load Short Cycle 8 to 13 gal 8 to 13 gal
Standard Cycle 10 to 15 gal 10 to 15 gal
dishwashing by hand once per day Full basin / wash & rinse 5 gal 5 gal
Using a running tap 30 gal 30 gal
MISC laundry once every 3 days Using a front-loader 18 to 20 gal 18 to 20 gal
Conventional top-loader 35 to 50 gal 35 to 50 gal
car washing twice per month Using 5 full 2 gallon buckets 10 gal/wash 20 gal/wash
Hose without a shut-off nozzle 50 gal/wash 100 gal
lawn watering

Kentucky bluegrass will need 1/2" to 3/4" of water every 3rd day*
Turf-type tall fescue will need 1/2" to 3/4" of water twice a week*
Buffalo grass will need 1/2" to 3/4" of water every other week*

*during hot, dry spells