Community Water Fluoridation: Questions and Answers
"The U.S. Department of Health and Human Services is proposing a change to the recommendation for the optimal fluoride level in drinking water to prevent tooth decay. The new recommendation, 0.7 milligrams of fluoride per liter of water, replaces the previous recommended range of 0.7 to 1.2 milligrams per liter. There are several reasons for this change, including that Americans have access to more sources of fluoride than they did when water fluoridation was first introduced in the United States. The new guidance will update and replace original recommendations provided in 1962 by the U.S. Public Health Service.

This fact sheet provides information on community water fluoridation, as well as current federal activities to update guidance and regulations on community water fluoridation..."

Prevalence and Severity of Dental Fluorosis in the United States, 1999-2004
"Key findings
Data from the National Health and Nutrition Examination Survey, 1999-2004 and the 1986-1987 National Survey of Oral Health in U.S. School Children

Less than one-quarter of persons aged 6-49 in the United States had some form of dental fluorosis.
The prevalence of dental fluorosis was higher in adolescents than in adults and highest among those aged 12-15.
Adolescents aged 12-15 in 1999-2004 had a higher prevalence of dental fluorosis than adolescents aged 12-15 in 1986-1987..."

Community Water Fluoridation Now Reaches Nearly 70 percent of U.S. Population
"Nearly 70 percent of U.S. residents who get water from community water systems now receive fluoridated water, according to a study by the Centers for Disease Control and Prevention.

The proportion of the U.S. population receiving fluoridated water, about 184 million people, increased from 62.1 percent in 1992 to 69.2 percent in 2006, said the study in this week′s Morbidity and Mortality Weekly Reports."