AP EXCLUSIVE: US says too much fluoride in water

FILE - In this June 3, 2008 file photo, Liberty Valley Elementary School, Danville, Pa., kindergarten student Tianna Swisher attempts to drink from the water fountain at Montour Preserve, near Washingtonville, Pa., during the school's outdoor field trip. Fluoride in drinking water, credited with dramatically cutting cavities and tooth decay, may now be too much of a good thing. It's causing spots on some kids' teeth. A reported increase in the spotting problem is one reason the federal government will announce Friday, Jan. 7, 2011, it plans to lower the recommended limit for fluoride in water supplies, the first such change in nearly 50 years. (AP Photo/Bloomsburg Press Enterprise, Bill Hughes, File)

FILE - In this June 3, 2008 file photo, Liberty Valley Elementary School, Danville, Pa., kindergarten student Tianna Swisher attempts to drink from the water fountain at Montour Preserve, near Washingtonville, Pa., during the school's outdoor field trip. Fluoride in drinking water, credited with dramatically cutting cavities and tooth decay, may now be too much of a good thing. It's causing spots on some kids' teeth. A reported increase in the spotting problem is one reason the federal government will announce Friday, Jan. 7, 2011, it plans to lower the recommended limit for fluoride in water supplies, the first such change in nearly 50 years. (AP Photo/Bloomsburg Press Enterprise, Bill Hughes, File)

More Photo Galleries

Happening Now