Engineering Fact Sheets

Water Fluoride Laboratory Proficiency Testing Program
Laboratory proficiency testing is important to verify the accuracy of measuring fluoride in drinking water by state reference laboratories.

Water Fluoridation Additives
Fluorosilicic acid is the most commonly used additive for water fluoridation, followed by two dry additives—sodium fluorosilicate and sodium fluoride. The American Water Works Association (AWWA) prepares standards for the manufacturing, quality, and verification of the fluoride additives. The American National Standards Institute prepares standards for documenting the purity of the additives.

Corrosion of Pipes
Water fluoridation will not increase water corrosion or cause lead to leach (dissolve) from pipes and household plumbing fixtures.

Water Fluoridation Reporting System (WFRS)
The WFRS helps states manage the quality of their water fluoridation programs. WFRS information is also used for national reports that describe the percentage of the U.S. population on community water systems receiving optimally fluoridated drinking water. The system was developed by the CDC in partnership with the Association of State and Territorial Dental Directors.


Calculating Fluoridation Statistics
A state’s fluoridation status is an indicator of progress in promoting oral health; consequently, it is important to document how this status is calculated.


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