Fluoride Action Network

sourcesoffluoride2-overview

Sources of Fluoride

"Estimation of the amount of fluoride ingested from all environmental and dietary sources is important so that rational and scientifically sound decisions can be made when guidelines for the use of fluorides are reviewed periodically and modified." (Journal of Dental Research 1992)

Workplace Exposure

Fluoride is a common air contaminant in industrial workplaces. As a result, workers in many heavy industries — including the aluminum, fertilizer, iron, oil refining, semi-conductor, and steel industries — can be routinely exposed to high levels of fluoride exposure. Since fluoride is also a common element of fluxes used in welding, welders are commonly exposed to airborne fluorides as well.

Inhaling airborne fluorides is not only a significant risk factor for respiratory disease; it can be a huge daily source fluoride intake. Under current regulations, industries are allowed to have 2.5 mg/m3 of fluoride in the air, which produces “a fluoride intake of 16.8 mg/day for an 8-hour working day.” (NRC 2006).

With the downsizing of U.S. heavy industries, it is unclear how many workers are currently exposed to airborne  fluorides. In the 1970s, however, the National Institute of Occupational Safety and Health (NIOSH) estimated that 350,000 American workers, in 92 occupations, had potential exposure. (Hodge 1977)

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