Just my personal experience: tap water in US tastes bad, bottled watered in US tastes also bad ("purified" water). As European on business trip I was forced to buy San Pellegrino or other imported (and expensive :/) brands. On the plane they also give "purified" water -> distilled water + salt.

You go to a restaurant, they insist on infinite refill on that bad tasting water...

I'm seriously not surprised with so called "Raw Water" movement in US.