Tap water isn't drinkable here unfortunately

I found myself thinking about that. I looked at the clean water on the toilet and thought, that's the exact same water, from the exact same source, that comes out of the kitchen faucet I use to drink and cook... What a fucking waste... (water is drinkable here ofc)

I sometimes see those eastern flushes with a tap on top that you can use to wash your hands or wtv and so the runoff water goes into the flush reservoir. I thought that was a great idea but, I think recently on lemmy someone asked about something that sounds like a good idea but isn't, and someone spoke about those toilet/sinks. I don't remember what the issues were but at the time I thought it made sense not to use it.

Still kinda hurts flushing perfectly good water down the drain :/