What city has the cleanest drinking water?

From the little advert tabby thing in gmail:

Reader's Digest recently conducted a survey entitled "The Fifty Cleanest Cities in America." Here are the cities that scored a perfect 50 points for water quality:

Portland, San Jose, Buffalo, Columbus, San Francisco, Denver, San Diego, Sacramento, Las Vegas, Salt Lake City, and Riverside (CA).

Meanwhile the world spends 100 billion on bottled water per year (30% of which is just bottled tap water) while it would only cost 30 billion to provide every human on the planet with a supply of clean drinking water.

This is why the only think I drink in bottles is beer. Boycott water!