Answer:
About 50 to 60 gallons per person (roughly)
Step-by-step explanation:
Well depends on how many people there are in one household but a single flush of a toilet takes 1 gallon of water... A minute in the shower takes 5 gallons(roughly) so I would save about 50 to 60 gallons per person (this is done with very limited knowledge of science and food tech but mainly off of basic uses