Abstract
Water is aptly described as the mother of life. It contains one oxygen and two hydrogen atoms connected by covalent bonds. Oxygen remains dissolved in water. All aquatic organisms depend on the dissolved oxygen for the respiration. Dissolved oxygen (DO) is a measure of how much oxygen in the water- the amount of oxygen available to living aquatic organisms. The present work mainly concentrates the comparative study of Dissolved oxygen content in different water samples. The Dissolved oxygen content in the river water is 5.071 mg/lr, rain water is 4.226 mg/lr, sea water is 3.099 mg/lr, well water is 2.817 mg/lr, tap water is 1.972 mg/lr, pond water is 0.845 mg/lr and the sewage water is 0.282 mg/lr. In the present study the Dissolved oxygen content in river water is higher when compared to other water samples and the Dissolved oxygen content in sewage water is very low when compared to other water samples. Key Words: Dissolved oxygen, Aquatic organisms, Water samples, River water, Sewage water.
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