en Measurement of Fluoride Concentration in Semnan Drinking Water Distribution عمومى General پژوهشي Research <span style="font-weight: bold">Background: </span>The existence of fluoride ion in potable water has distinctive effects on human health. Fluoride is attracted by positively charged calcium in teeth and bones due to its strong electro-negativity which results in dental, skeletal, and non-skeletal forms of xuorosis and associated health complaints in children as well as adults. <br><span style="font-weight: bold">Methods:</span> Water samples from groundwater used for drinking were collected from different water sources (over 22) and fluoride levels were determined through spectrophotometer, DR/5000 (Hach). <br><span style="font-weight: bold">Results:</span> The mean fluoride concentration was 1.14 ppm. The maximum concentration of fluoride recorded was 1.78 ppm while the lowest was 0.85 ppm. <br><span style="font-weight: bold">Conclusion:</span> Semnan drinking water is suitable for consumption without any treatment. Drinking water, Fluoride, Monitoring Drinking water, Fluoride, Monitoring 444 447 http://ijt.arakmu.ac.ir/browse.php?a_code=A-10-2-14&slc_lang=en&sid=1 Mohammad Noori Sepehr محمد نوری سپهر 10031947532846003219 10031947532846003219 No Department of Environmental Health Engineering, Karaj University of Medical Sciences, Karaj, Iran Department of Environmental Health Engineering, Karaj University of Medical Sciences, Karaj, Iran Hoda Amiri هدی امیری Hoda.Amiri@gmail.com 10031947532846003220 10031947532846003220 Yes Department of Environmental Health Engineering, Karaj University of Medical Sciences, Karaj, Iran Department of Environmental Health Engineering, Karaj University of Medical Sciences, Karaj, Iran