There has been an increase in a condition called fluorosis . ` One of water fluoridation 's biggest advantages is that it benefits all residents of a community -- at home , work , school or play , '' said Health and Human Services Assistant Secretary for Health Dr. Howard Koh . It causes spotting and streaking on children 's teeth . The FDA says the new levels will still prevent tooth decay but minimize fluorosis . It was first added to public drinking water in the 1950s .
There has been an increase in a condition called fluorosis . It causes spotting and streaking on children 's teeth . The FDA says the new levels will still prevent tooth decay but minimize fluorosis . It was first added to public drinking water in the 1950s .