Assuming you think rich, well educated people can afford to drink bottled water more than poor folks (which simply isn't true for the 2nd leading beverage category). This has got to be awfully confusing info for the EWG and Corporate Responsibility International people.
Nonetheless, this article from Red Orbit reviews the EPICURO national bladder cancer study reports that "well educated people who choose to drink bottled water rather than water from public supplies may be no less exposed to potentially cancer-causing water contaminants."