Abstract
The study included the selection of groundwater from three villages north of the city of Mosul, namely the villages of (Hassan Jallad, Ghazil and al-Khrab), with two wells from each village for six months, with one sample from each well per month to study its physical and chemical characteristics and determining the extent to which it can be used for drinking and various household uses. By studying the characteristics (groundwater temperature, electrical conductivity, dissolved oxygen in water, pH, water hardness, as well as positive and negative dissolved ions in water). The results of the study indicated that the temperature of the groundwater is stable and had little variation throughout the study period, while the value of the electrical conductivity reached (1738) µS/cm in the well (5) in Alkharab village, while the concentration of dissolved oxygen decreased to an average of (1.3) mg / liter in the well (1) in Hasan jalaad village.Meanwhile the hardness values ranged between (842-312) mg / liter, However the results indicated that the values of calcium ions ranged between (268-72) mg / liter, while the values of magnesium ions ranged between (69-27) mg / liter On the other hand The values of sodium and potassium ions reached to the limits of (22) mg/L and (3.90) mg/L, respectively. As for the studied negative ions (bicarbonate, chlorides and sulfates), they reached (460) mg/L, (68) mg/L and (510) ) mg/L, respectively
