These statistics were prepared using water system data reported by states to the CDC Water Fluoridation Reporting System as of December 31, 2006, and the U.S. Census Bureau estimates as reported in Bailey W, Duchon K, Barker L, Maas W. Populations receiving optimally fluoridated public drinking water – United States, 1992–2006. MMWR 2008; 57(27):737–741.
National Water Fluoridation Statistics
|Total U.S. population, personsa||299,398,484|
|U.S. population on public water systems, personsb||262,690,043|
|Total U.S. population on fluoridated drinking water systems, personsb||184,028,038|
|Percentage of U.S. population receiving fluoridated waterc||61.5%|
|Percentage of U.S. population on public water systems receiving
|Total number of community water systems (CWS) in United Statesb||53,429|
|Number of CWS providing fluoridated waterb||16,412|
|Number of CWS adjusting fluorideb||6,368|
|Number of CWS consecutive to systems with optimal fluoride levelsb||6,705|
|Number of CWS with naturally occurring fluoride at or above optimal levelsb||3,339|
|Population served by CWS with naturally occurring fluorideb||8,078,890|
State Fluoridation Percentage Calculations and States Ranked by Fluoridation Percentage
|State||Persons receiving fluoridated water||Persons served by CWS||%||Rank|
|Colorado||3,085,319||4,190,698||73.6%||Tied for 26|
|Delaware||603,207||819,176||73.6%||Tied for 26|
|District of Columbiae||595,000||595,000||100%|
|Idaho||316,350||1,011,949||31.3%||Tied for 45|
|Montana||248,850||794,563||31.3%||Tied for 45|
|South Dakota||657,022||691,333||95.0%||Tied for 7|
|Virginia||5,830,328||6,135,847||95.0%||Tied for 7|
a. Annual Population Estimates and Estimated Components of Population Change for the United States and States: April 1, 2000 to July 1, 2006. Source: Population Estimates Program, U.S. Bureau of the Census. Internet Release date: December 22, 2006.
b. Reported in CDC Water Fluoridation Reporting System (WRFS).
c. Fluoridated population divided by total population.
d. Fluoridated population divided by population served by community water systems.
e. Population served by CWS exceeded the U.S. Census state population estimate; number of persons was reduced by the ratio of the population estimate to the CWS population estimate.
f . Complete data were not available from WFRS; state provided additional information.
More detail on U.S. Census Bureau estimates can be found at Calculating Fluoridation Statistics
Historical fluoridation statistics are available at Fluoridation Statistics
- Page last reviewed: July 10, 2013
- Page last updated: August 19, 2016
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