Excerpt:

Where have high ?uoride levels been found in B.C. well water?

The Ministry of Environment evaluated the results of groundwater samples obtained between 1977 and 1993 through the Water Quality Check Program. Of over 8,500 samples analysed for ?uoride, 270 or 3.1% had ?uoride levels above the Canadian drinking water guideline of 1.5 mg/L, and 0.1% of samples had ?uoride concentrations greater than or equal to 10 mg/L. High concentrations of ?uoride in groundwater were observed in rural wells in the upper rural area of Westbank and near the communities of Armstrong, Duncan, Enderby, Gabriola Island, Ladysmith, Nanaimo, Okanagan Falls, Penticton, Salmon Arm, Saltspring Island, and Vernon. Fluoride levels above the drinking water guideline may also occur locally in other regions of the province.

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