1 Comparison of Chemical Compositions among Different Drinking Water Sources in Kalar City Azad H. M. Alshatteri, Rahman A. Muhamed Murad Department of Chemistry / Garmian University / Kalar / Iraq *Corresponding author e-mail address: azadalshatter@hotmail.com Abstract In this study, 21 samples of drinking water from three different sources (tap water, dug well, and drilled well) in seven places in Kalar city have been collected and their physicochemical properties have been investigated. The chemical tests performed include tests on some soluble inorganic ions which included the anions of sulphate ( 4 2− ), nitrate ( 3 − ), chloride (Cl − ), carbonate ( 3 2− ) and the cations of potassium (K + ), sodium (Na + ), magnesium (Mg 2+ ), calcium (Ca 2+ ). The physical tests included conductivity, pH, total dissolved solid (TDS), total hardness, total alkalinity, dissolved oxygen (DO), and Turbidity. The test results then compared with Iraq standard limits for drinking water. Most of the results were in accordance with the limits, and there are no anomalous differences among them. However, according to the physical and chemical test results, it can be concluded that tap water has a lesser amount of contamination compared to drilled well water and dug well water, and drilled well water has less pollution than dug well water. Keywords: drinking water samples, atomic absorption spectrometry, flame photometry, UV-VIS spectrophotometer, and standard solutions of inorganic ions.