An Sonjae writes:

Hello. If we can return to the original question, I would say that
the simple answer (already implied in passing) is that the chlorine
put into tap water in most countries that I know of is extremely
destructive of true tea taste, and if your tap water is loaded with
limestone / chalk (hard water) that too will spoil things quite
effectively. (I know nothing about fluoride in terms of its effect
on the taste of tea)

I don't know about the effect of fluoride in water either, but I do
know there's a lot of fluoride already in the tea leaves before you
add water. And don't forget the aluminum!

/Lew (with no obvious signs of aluminum-induced Alzheimer's yet)
---
Lew Perin /
http://www.panix.com/~perin/babelcarp.html