The present work describes the application of Canadian Council of Ministers of the Environment Water Quality Index (CCME WQI) for three stations located at the Al- RumaythaRiver in Al- Rumaytha city. Water samples collected a monthly during the period from November 2014 to October 2015, and were analyzed for physical and chemical properties immediately after collection. CCME WQI was applied using nine water quality parameterinclude Air temperatures, Electrical conductivity, Total dissolved solids, pH , Dissolved oxygen , Total hardness , Sodium, Potassium and Turbidity. Based on the results obtained from WQI, the water quality of Al- RumaythaRiver ranged between 27.69 – 33.93 which indicate that the water quality is very bad or Poor and is not fit to be used for drinking purposes in all study sites and that due to the effect of various urban, industrial and agriculture wastes sources. The present paper confirms the need to take a serious action for monitoring the river for good management
