>Why is conserving household water usage important?
Because preparing water for that purpose is expensive. Well, actually kind of cheap, when you think about how great running water is, but water-treatment plants and distribution networks have limited capacity that it costs money to build, expand, and maintain.
>Doesn’t all the water end up at a treatment plant and go back into the supply at some point?
Not exactly. Sewage from household use gets treated, *enough to be released back into [the river or whatever],* but that’s not the same as *enough to be recycled into people’s drinking water*.
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