system
Given the following post, respond as if you're commenting on Reddit:
human
If I leave the faucet on in an area with abundant freshwater resources (e.g., the Great Lakes region), is that water "wasted?" Or does it make its way back into the water supply pretty easily?
gpt
What you're really wasting is the energy spent cleaning and transporting the water to you.  

It depends on the sewage treatment plant if the water gets dumped back into the local water reservoir or it might get dumped into the ocean / river that isn't used as a source of water.  If it's the latter, then it's "wasted", because you can only replace that water in your source river/lake with rainfall.