 If you still think the fear of tap water is some elaborate marketing scam to get you to buy filters, think again. Dr. Andrew Huberman, a professor at Stanford Medical, recently stated, I have to take a deep breath because in researching tap water and what's contained in tap water, not just in the U.S., but around the world, I confess, the picture is pretty scary. The word is getting out, and more and more mainstream scientists are realizing that drinking tap water is simply not a good idea.