New ask Hacker News story: Ask HN: What can you do with free running water?

Ask HN: What can you do with free running water?
6 by excitednumber | 8 comments on Hacker News.
This may be a down-vote poop post, but, here's trying. I live in a building in a city where water is free. On its own merit, this is of course fantastic. Is there anything interesting to do with free water? Small hydro-power generator to mine crypto? Looking for fun ideas.