Evaluating the Water Quality of the Tigris River Between Khawaja Khalil and Sheikh Mohammed Villages, Northwest Iraq

Saeed, Ibrahim Omar; Mohammed, Awaz Bahrooz; Mukdad, Raghad M.; Mohamed Taher, Ahmed

doi:10.21608/ejabf.2025.422805.6557

Evaluating the Water Quality of the Tigris River Between Khawaja Khalil and Sheikh Mohammed Villages, Northwest Iraq

Document Type : Original Article

Authors

¹ department of Biology /College Of Sciences / Tikrit University.

² Department of Biology, College of Science /University of Kirkuk/, Kirkuk, Iraq

³ Department of Biology, College of Education for Pure Sciences, Tikrit University, Iraq.

⁴ Ministry of Education, Open College of Education / Nineveh Center, Iraq

10.21608/ejabf.2025.422805.6557

Abstract

The study examined the physical and chemical parameters of some areas of the Tigris River in the northwestern part of Nineveh Governorate, covering three sites, starting from Khawaja Khalil village, passing through Daranjokh, and ending with Sheikh Mohammed village, for the period from October 2024 to March 2025. The total platelet count (TPC) of bacteria was also calculated to assess the suitability of the water for human use. Physical, chemical, and biological parameters such as air and water temperature, pH, total dissolved solids (TDS), total alkalinity, electrical conductivity (EC), active phosphate (PO4), nitrite (NO2), sulfate (SO4), turbidity, biological oxygen demand (BOD), and total suspended solids (TSS) were measured. Some tests were conducted in the field, while others were conducted in the central laboratory of the left coast of Mosul. Most of the studied parameters were found to be compatible with international and Iraqi water specifications, with a slight increase in the total platelet count (TPC) that did not affect the water quality, especially at station No. (3) which reached (51.25 * 102) cells/ml, and the biological demand (BOD) reached 2.4mg/ L. The pH values ranged between (7.50-8.90), the air temperature between (8-20)°C, the water temperature between (7-18)°C, the electrical conductivity between (190-2064) µS/cm, and the turbidity between (33-196) N.T.U. The total dissolved solids (TDS) values ranged from (800-1207) mg/L, and the total basicity values ranged from (131-190) mg/L, while the highest value for phosphate was 0.89mg/ L microgram/L, and the highest value for nitrite was 51mg/ L, while the highest value for sulfate was 269mg/ L.

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