The evaporated water increases the concentration of the water in the pot for fuoride and metals.
That's why I have a Reverse Osmosis filtration system under my sink that filters out all that garbage, best $200 I ever spent, this is the one I have, took 20 minutes to install it, https://www.amazon.com/Express-Water-Alkaline-Ultraviolet-Filtration/dp/B01NAGSZTA/ref=sr_1_6?crid=15MC14ACCWY94&dchild=1&keywords=express+water+reverse+osmosis+system&qid=1616439177&sprefix=express+water%2Caps%2C337&sr=8-6 I am not affiliated with this company or endorsing it, it is just the one I chose after a lot of research
