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Fluoride: Drinking Water

Volume 495: debated on Monday 6 July 2009

To ask the Secretary of State for Environment, Food and Rural Affairs pursuant to the answer of 17 June 2009, Official Report, column 380W, on fluoride: drinking water, what assessment the Drinking Water Inspectorate made of the adequacy of the remedial action taken by Three Valleys Water following the addition of excessive levels of fluoride to the water supply in 2000. (282193)

The Drinking Water Inspectorate has provided the following information about the assessment of the single sample result on 6 July 2000.

The natural level of fluoride in the source water is between 0.07 and 0.25 mg/l (the European maximum level permitted is 1.5 mg/l). There is no additional fluoride put into the water at the treatment works. The single adverse result recorded on 6 July probably arose as a consequence of an error in the sampling/analytical process. However this could not be proven conclusively. All samples in the nine years since 6 July 2000 have given satisfactory results.