How much of that is shower water though? Drinking water, I think is probably closer to 2-3 gallons (on the high end) per day for most Americans. We also should

How much of that is shower water though? Drinking water, I think is probably closer to 2-3 gallons (on the high end) per day for most Americans. We also shouldn’t forget that after disposing of the water, the local municipality can recycle it! For island nations, a few strategic water reserves could be cleaned and stored for future use. And then obviously, for more developing nations, they already use a lot of grey water for daily activities, so this becomes a source of consistent clean drinking water.