This report will show you the amount of water used PER DAY for flushing the toilet in the united states based on the 2016 Water Research Foundation report Residential End Uses of Water, Version 2.

This chart shows the population of the state as a whole with every person flushing the toilet 5 times per day using a 2.6 GPF toilet.

Average Toilet Water Usage 2.6 GPF. Chart is based on 5 Flushes Per Day Per Person.
(*Reference: Water Research Foundation – Residential End Uses of Water, Version 2)