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Abstract : This study is conducted in the environment laboratory for postgraduate studies of the Biology Department - College of Science at Tikrit University. It includes a field survey to estimate some of the physical and chemical aspects of water for the study area. The field study starts from the beginning of October 2021 until March 2022, and six sites for water wells are selected within the Al- Hamadanyah district and its affiliated villages. Water samples are taken from these sites monthly to determine some of their physical aspects such as (turbidity, total dissolved solids (TDS) and electrical conductivity EC) with some chemical aspects (pH, dissolved oxygen, total alkalinity, and total hardness). The results indicate high values of electrical conductivity, total dissolved solids, vital oxygen requirement and total hardness. The results also show that the pH values tend to be alkaline in some of the studied sites.

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