Fluoridating water

If the Co A expresses concentrations as parts per billion (ug/l), compare the resultant calculation with the far right column in the MCL table.

The study, published Wednesday in the journal Community Dentistry and Oral Epidemiology, compared Grade 2 students in Calgary and Edmonton, which still adds fluoride to its drinking water.

fluoridating water-62

This specific standard addresses the purity of drinking water treatment chemicals, including fluoride.

For those impurities in the fluoride supply, the NSF/ANSI Standard 60 uses the following approach: It assumes that the dosage rate will be 10 times the normal or optimal dosage rate and that the resulting concentration of the impurity will be less than 10% of the maximum, allowing concentration of that impurity in the delivered drinking water.

It will be expressed in either parts per million (mg/1) or parts per billion (ug/l).

For example, if the Co A expresses concentrations as parts per million (mg/l), compare the resultant calculation with the middle column in the MCL table.

Hence there is a safety factor of 100 inherent with the NSF/ANSI Standard.

Suppliers of the fluoride chemical must, by State law, provide a Certificate of Analysis for each delivered batch of fluoride to the receiving water utility.

Brandy Payne, Alberta's associate minister of health, told CBC News it's too soon to say whether the province will reconsider its policies regarding fluoridation in view of the study.

"This is a relatively new finding, so we are going to take a look at the report and go from there with an evidence-based decision," she said.

This is because the concentrated fluoride and its impurities will be greatly diluted when added to the drinking water supply.

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