Assessment of the Water Qualitative Characteristics of the Tigris River Passing Through the City of Mosul and Calculating the Water Quality Index Coefficient

The quality of the water TigrisRiver passing through city Mosul was studied, starting from Kubba area in north to Yarmajah south, and is only resource for city. Physical Chemical propertiesof river conducted, which included (water temperature, pH, electrical conductivity, total dissolved solids, turbidity, oxygen some positive negative ions), Canadian Water Quality Index = (WQI) used express water. Tigris as it passes Mosul. results indicated that tends towards alkalinity, has good ventilation, average values ​​ranged between (8.3-9.3) mg / liter. ions nitrates, orthophosphates, sulphates chlorides showed a variation their concentrations during study period. rates sodium potassium ion ranged (19.9-24.6) (2.6-4.2) liter, respectively. studied classified (good - moderate) drinking, ​​of index (76.7-91.2). (86.3-99.6) excellent too conservation system.