My Googling came up with 180 gallons per person per day.
That makes 20 million gallons the equivalent of 304 people.
The “savings” is most likely a made up statistic anyway to show some positive result out of this greenie “eco-toilet” disaster.
Engineers generally use 50 gal per person per day. I know cause I is one. ;)
Engineers generally use 50 gal per person per day. I know cause I is one. ;)