The Division of Oral Health at the National Center for Chronic Disease Prevention and Health Promotion of the Centers of Disease Control and Prevention (CDC) prepared the following statistics using water system data reported by states to its Water Fluoridation Reporting System and the US Census Bureau state population estimates.
CWS = Community Water System
|Total US population on fluoridated drinking water systems, persons (a)
|Percentage of US population receiving fluoridated water (b)
|Percentage of US population on CWS receiving fluoridated water (c)
|Population served by CWS with naturally occurring fluoride at or above optimal levels (a,d)
|Number of CWS with naturally occurring fluoride at or above optimal levels (a,d)
|a. Reported in CDC Water Fluoridation Reporting System (WFRS). For purposes of this report, a water system is considered a community water system if so designated by the state drinking water administrator in accordance with the regulatory requirements of the US Environmental Protection Agency. In general, public water systems provide water for human consumption through pipes or other constructed conveyances to at least 15 service connections, or serve an average of at least 25 people for at least 60 days a year. A community water system is a public water system that supplies water to the same population year-round. Available at http://water.epa.gov/infrastructure/drinkingwater/pws/factoids.cfm.
|b. Fluoridated population divided by total population.
|c. Fluoridated population divided by population served by community water systems.
|d. The increase from 2012 to 2014 in the population served by CWS with naturally occurring fluoride at or above optimal levels likely resulted from inclusion, for the first time, of the number of persons served by these systems in California as reported in WFRS. The total number of persons receiving fluoridated water in California was based on state data and may not fully reflect this increase derived from WFRS data.