You save 20 gallons a day to flush your toilet and water your garden? We use 30-40 gallons per day in all of our water use and recycle that for use in the garden.
IMHO a badly underestimated factor in water use awareness in the US - faced with the prospect of converting 33 inches of rain into acre-feet, a percentage of that into cubic feet of aquifer recharge, and a calculation from that of how many head of cattle at 19 gallons @ day (in the heat) one can run on an irrigated vs non-irrigated 17 acre pasture with a drilled and dedicated well for the stock tank, the brain just gives up and turns to baseball.
So why can't anybody on my team pitch in Yankee Stadium?