In this study, 96 water samples were collected from the Tigris River within Baghdad city. These samples were used for studying the physical and chemical parameters by using a geographical information system GIS (spatial analysis). The analytical results show high concentration of total dissolved solid (TDS), electric conductivity (EC), total hardness, Sulphate (SO4), Chloride (Cl) and Iron (Fe), which indicates signs of deterioration. On the other hand, the values of pH, calcium (Ca), Magnesium (Mg), and fluoride (F) are within permissible limits as per World Health Organization (WHO) and Iraqi Criteria.
 K. S. Kannan and V. Ramasubramanian, “Assessment of Fluoride contamination in Ground Water Using GIS, Dharmapuri District, Tamilnadu, India,” International journal of Engineering Science and Technology (IJEST), Vol. 3, No. 2, 2011, p. 1077.
 O. Altansukh and G. Davaa, “Application of Index Analysis to Evaluate the Water Quality of the Tuul River in Mongolia,” Journal of Water Resources and Protection, Vol. 3, No. 6, 2011, pp. 398-414.
 R. C. Ferrier et al., “Water Quality of Scottish Rivers: Spatial and Temporal Trends,” The Science of the Total Environment, Vol. 265, No. 1-3, 2001, pp. 327-342.
 C. Neal, et al., “Water Quality of Treated Sewage Effluent in a Rural Area of the Upper Thames basin, Southern England and the Impacts of Such Effluents on Riverine Phosphorus Concentrations,” Journal of Hydrology, Vol. 304, No. 1-4, 2005, pp. 103-117.
 H. P. Jarvie, C. Neal and P. J. A. Withers, “Sew-AgeEffluent Phosphorus: A Greater Risk to River Eutrophication than Agricultural Phosphorous?” Science of the Total Environmental, Vol. 360, No. 1-3, 2006, pp. 246-253. http://dx.doi.org/10.1016/j.scitotenv.2005.08.038
 A. M. Rabee, B. M. Abdul-Kareem and A. S. Al-Dhamin, “Seasonal Variations of Some Ecological Parameters in Tigris River Water at Baghdad Region, Iraq,” Journal of Water Resource and Protection, Vol. 3, No. 4, 2011, pp. 262-267. http://dx.doi.org/10.4236/jwarp.2011.34033
 K. W. AL-Janabi, F. N. Alazawi, M. I. Mohammed, A. A. Kadhum and A. B. Mohamad, “Chlorophenols in Tigris River and Drinking Water of Baghdad, Iraq,” Bulletin of Environmental Contamination and Toxicology, Vol. 87, No. 2, 2011, pp. 106-112.
 Y. Saeedrashed and A. Guven, “Estimation of Geomorphological Parameters of Lower Zab River-Basin by Using GIS-Based Remotely Sensed Image,” Water Resources Management, Vol. 27, No. 1, 2013, pp. 209-219.
 C. Childs, “Interpolation Surfaces in ArcGIS Spatial Analyst,” ESRI Education Services, 2004. www.seri.com
 Canadian Council of Ministries of the Environment (CCME), “Scientific Criteria Document for the Development of the Canadian Water Quality Guidelines for the Protection of Aquatic Life,” 2012.
 Ministry of Environment, “System Maintenance of River and Public Water Pollution in Iraq,” 1998.
 B. Shomar, S. A. Fakher and A. Yahya, “Assessment of Groundwater Quality in the Gaza Strip, Palestine Using GIS Mapping,” Journal of Water Resource and Protection, Vol. 2, No. 2, 2010, pp. 93-104.