To get the point across about what is put in the local water supply, I used to do an experiment with the kids in my science class. .I would give them some local water that went through the Brita. Then I would give them the same water straight from the tap. The look on their faces was something to behold.
Folks, in general, will drink more water if it taste good to them.
We all, pretty much, need to drink more than we do(water that is).
But so often it's just not, umm, umm good, so we grab a soda (HFCS damage ,etc.) or eat something when all we really needed was a good drink (of water).
We are on a well in the mountains. When we do venture into a large town and they drink water that is from a fountain or a tap, the look on their faces is hysterical. They can’t believe people drink that all the time!