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  • and in 12 percent more than 2 milligrams per liter. Cherkinsky contains a large amount of fluorine i...
    · May 10
  • with nitrate concentrations ranging from 18 to 257 milligrams per liter. Similar outbreaks have been...
    · May 10
  • including groundwater reaching the surface on the slopes of ravines and river banks The sanitary rel...
    · May 10

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