It's calcium, good for your bones
This is what you get when you let two cups of water vapor on the heater. The quality of the local tap water aka "Drinking water"
https://nostrcheck.me/media/public/nostrcheck.me_4990857941120764251704817447.webp
Discussion
too much. the water is too hard and you can literally taste it. even when you make coffee with this water.