AN ASSESSMENT OF WATER QUALITY OF THE NORTH AND SOUTH PART OF THE SHATT AL-ARAB USING ORGANIC POLLUTION INDEX (OPI)

Water quality indicates to the physical, chemical and biological properties of water based on the standards of it utilize. The current study aims to assess some quality of surface water in some areas of the Shatt Al-Arab using the Organic Pollution index. During the period from October 2018 to September 2019, water samples were assembled from three stations, The stations identify by the presence of aquatic plants and unpopulated, The third station characterized by the A near proximity to residential settlements that deposit hazardous wastes into surface waters and agricultural activity both contribute to this problem. Monthly changes in the organic pollution index show that there is little variation between stations, If the minimum value of the index (6) is recorded in the second station and thus classified as None, and the highest value of (10) in the third station and is classified under the category Weak, The general classification of the Shatt Al-Arab (8) is classified within the category None, The results showed that there are no significant differences between the first and second stations and the presence of significant differences with the third station.