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
U.S. population on public water systems, personsb
Total U.S. population on fluoridated drinking water systems, personsb
Percentage of U.S. population receiving fluoridated waterc
Percentage of U.S. population on public water systems receiving
Total number of community water systems (CWS) in United Statesb
Number of CWS providing fluoridated waterb
Number of CWS adjusting fluorideb
Number of CWS consecutive to systems with optimal fluoride levelsb
Number of CWS with naturally occurring fluoride at or above optimal levelsb
Population served by CWS with naturally occurring fluorideb
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. Population, population change and estimated components of population change: April 1, 2000 to July 1, 2006 available at http://www.census.gov/popest/data/historical/2000s/vintage_2006/index.html.
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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