الملخص

Abstract
Abstract The aim of the present study is to know the water specification which ejected from Al-Kut sewage treatment plants in the Tigris River the main great river in Iraq and going through Al- Kut City the center of Wasit Province. It is located 32.516 latitude and 45.847 longitudes, and it is situated at elevation 22 meters above sea level. Four sewage treatment plants stations were selected in Al-Kut City, Bimonthly sampling was carried out from January 2018 till December 2018; two samples were taken each month. Station one was AL-zahraa plants. The second station was Dawr aleummal plants, the third station is Aleiza plants and the four stations is ALfalahia plants. In the present study twenty-eight physical and chemical parameters were selected on the importance of these parameters. These parameters are ranged as follows: COD 98 to 360 mg/L, water temperature 13.3 to 34 ºC, EC 1337 to 3800 µS/cm H2S 9 to 81 mg/L, TDS 800 to 2450 g/L, NO2 = ND to 0.9 mg/L ,TSS 40 to 560 mg/L, pH 7 to 8.1 , NH3 22 to 95 mg/L، BOD5 53 to 318 mg/L، Cl- 153 to 447 mg/L, Sulfate 125 to 987 mg/L, NO3 -2 ND to 9 mg/L PO4 -2 ND to 19.5 mg/L. Concluded from the current study, all wastewater treatment has a direct impact on the water characteristics of the Tigris River.