shower - 6 gallons of water

shower - 3 gallons of water
low flow

toilet flush - 5 gallons each flush unrestricted

toilet flush - 4 gallons each flush which has a brick in the toilet tank
“bricked”

toilet flush - 2 gallons each flush which is low flow
low flow

brushing teeth - 10 gallons
tap running

brushing teeth - wet brush, rinsing briefly half a gallon

shaving - 10 gallons
tap running

shaving - 1 gallon
filling basin

hand washing - 20 gallons
tap running

hand washing - 1 gallon
filling basin

dish washing - 30 gallons
tap running

dish washing - wash and rinse in sink 5 gallons
filling sink

automatic dishwasher - full cycle 15 gallons
full cycle

automatic dishwasher - short cycle 11 gallons
short cycle

washing machine -  40 gallons

** use your best judgment on any other water usage**