Study of the effect of industrial waste on the chemical, physical and biological content of the Tigris River within the city of Samarra

This study included the selection of three stations, two them on Tigris River passing through city Samarra, and second station representing industrial wastewater - Samarra. The period was for six months, starting from October 2021 until March 2022. knowing chemical, physical biological properties plant river water observing effect quality in River. chemical factors pH, dissolved oxygen requirement oxygen, while air temperature, temperature total salts. results showed that pH values tended to be alkaline , ranging between 6.6 8.7, similar values, 3.8 9 mg / l, vital ranged 0.8 30 7 32 ° C, 5 26 salts 210 1380 number coliform bacteria (TC) 0 1100 cells 100 ml.