/ck/ - Food & Cooking

Can you “waste water”? Got in a debate with a friend while cooking when I left the tap running for a minute while I left the kitchen. They seem to think the water is lost forever by going down the drain, even though I told them it goes back into the system through water treatment plants. I mean even if you left a hosepipe running, it all goes back into the water cycle just through evaporation and rain.

So how exactly can you waste water? Besides the cost of using it.