Fluorine in Surface Water and Fresh Groundwater of Arkhangelsk Oblast

The fluorine content in river water and fresh groundwater of the southeastern White Sea area, which is the conjugation zone of the Mezen syneclise and the Baltic Shield, has been determined. It is established that the studied waters have a low fluorine content, which differs greatly from the physiologically optimal range, except for the water from well 27 in the Zolotitsa River valley. The level of fluorine concentrations is close to that for drinking water in the adjacent territories of Arkhangelsk oblast with a different lithogenic basis. This is indicative of the defining role of the climate factor in the fluorine prevalence in surface water and fresh groundwater in the region, which serves as current and potential sources of drinking water supply.