The Canadian model water quality index (CCME WQI) was used to evaluate the water quality in some areas of the Shatt al-Arab and the East Hammar Marsh from October 2020 to September 2021. The variables used in calculating the index included water temperature, pH value, biological oxygen demand, salinity, and dissolved oxygen. According to the CCME WQI, the water quality of the Shatt al-Arab was categorized as "Marginal," while the water quality of the East Hammar Marsh was ranked as "Poor." This indicates that the environmental factors studied were often outside the permissible normal levels. The statistical analysis revealed no significant differences between the first station (Al-Dair) and the second station (Al-Haritha), but significant differences were found with the third station (Al-Mashab).