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veen  ·  3697 days ago  ·  link  ·    ·  parent  ·  post: Our cities' water systems are becoming obsolete. What will replace them?

I've attempted to research this more, but it is quite difficult to pin down why the difference is so huge. This report by the EPA breaks the US water use down to these components:

And a similar image I found from my water company, but in liters (4L is ~1 gal):

We use 50L for showering, you guys use 100L. We barely use any water for the garden - I think that's in the 1,8L or in the 5,3L slice - while you use 100L. I would assume most of that difference is in the efficiency of the showerheads and washing machines. I've noticed that the toilets here use much more water than back home.