Document Type : Primary Research paper
Department of Fisheries and Marine Recourses, College of Agriculture, Basrah Univesity, Basrah, Iraq
Department of marine invertebrate, Marine Science Center, Basrah University, Basrah, Iraq
Department of Chemistry and Marine Environmental Pollution, Marine Science Center, Basrah University, Basrah, Iraq
Cluster analyses technique has been used to assess for the classification of water quality of Shatt Al-Arab river for drinking purposes. Three stations ahead of water treatment plants have been chosen, St.1, upper stram of Shatt Al-Arab River close to the main water treatment plant and it is effected by discharging of untreated waste from little small scale industries. St.2, Salhia which is about 4 km downstream st.1 close to Al-Bradhiah water treatment plant and it is effected heavily by cattle bathing and discharge of laundering cloths. St.3, Abu Al-Khaseeb about 7 km downstream st.1, close to Mhellah water treatment plant. All stations are effected heavily by waste water from Basrah City. Cluster analysis grouped the 11th physico-chemical parameters of the three selected sampling stations within Shatt Al-Arab river and during the period of study into three clusters at (Dlink/Dmax) x 100 < 80 :1st DO and Trans. , 2nd pH, and 3rd all the rest of the studied water parameters. And Results suggested three sources of water quality which cause an overall water quality of Shatt Al-Arab River.