LONDON - JULY 9:  A glass is filled with water from the tap July 9, 2003 in London, England. Plans to force water companies to add fluoride to their supplies are being considered in the House of Lords.  Opponents to the scheme describe the idea as "mass poisoning."  Meanwhile, a watchdog report say that the quality of water in England and Wales are at an all time high and has never been so good. Nearly all the water tested last year met national and European Union standards.  (Photo by Ian Waldie/Getty Images)