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Industrial-Grade Fluoridation Chemicals Cost Society $Billions in Arsenic-induced Cancers


PRNewswire

05-14-13

NEW YORK, May 14, 2013 /PRNewswire-USNewswire/ -- Industrial-grade fluoride chemicals added to US public water supplies contain arsenic that the EPA classifies as a human carcinogen. Switching to low-arsenic pharmaceutical-grade fluoride will save society $1 billion to $14 billion annually, according to research published in Environmental Science & Policy, led by former EPA senior scientists who are experts in chemical risk assessment, reports the Fluoride Action Network (FAN).

Although never studied for safety or efficacy, hydrofluorosilicic acid (HFSA) is added to public water supplies as a purported cavity preventive. The industry-funded group that regulates water additives, NSF International, allows several toxins in HFSA, including arsenic.

The Safe Drinking Water Act requires EPA to determine the level of certain contaminants in drinking water at which no adverse health effects are likely to occur. These health goals, based solely on possible health risks and exposure over a lifetime with an adequate margin of safety, are called maximum contaminant level goals (MCLG). The MCLG for arsenic is zero. The EPA also sets an enforceable maximum contaminant level (MCL), but concedes this level will not prevent cancers.

Senior researchers, Drs. William Hirzy and Robert Carton, write, "Arsenic levels in this HFSA product vary substantially but are typically about 30-35 mg/kg." These levels would qualify it as toxic hazardous waste if not for a legal loophole because it is sold to fluoridate water. The study found HFSA raised the arsenic level of finished or tap water by anywhere from 0.078 to 0.43 parts per billion (ppb).

Ninety percent of arsenic showing up in tap water comes from fluoridation chemicals, according to a study in the American Water Works Association publication, Opflow, led by Dr. Cheng-nan Weng.

Hirzy and Carton found that industrial-grade HFSA contains from 100 to 500 times more arsenic than pharmaceutical grade sodium fluoride (NaF).

Using EPA's calculation methods, HFSA would cause from 320 to 1800 arsenic-induced cancers per year. They calculated these cancers would cost society $1 billion to $6 billion per year.

The researchers conclude: "Our analysis shows that, if local governments that currently add HFSA to their drinking water wish to continue delivering fluoride to their citizens and at the same time reduce the number of lung and bladder cancers among their citizens, they could do so with a significant net benefit to society by switching to USP NaF [pharmaceutical grade Sodium Fluoride] for fluoridation."

Paul Connett, PhD, FAN Director says, "This study provides additional scientific evidence that fluoridation should be stopped, as the purported benefits no longer outweigh the risks."

Reference: Hirzy JW, Carton RJ, Bonanni CD, Montanero CM, Michael F. Nagle MF. 2013. Comparison of hydrofluorosilicic acid and pharmaceutical sodium fluoride as fluoridating agents--A cost-benefit analysis. Environmental Science & Policy 29: 81-86 (May). http://www.sciencedirect.com/science/article/pii/S1462901113000087

SOURCE Fluoride Action Network

Copyright PRNewswire 2013

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