About 70 percent of the earth is water, but only 2.5 percent of that is freshwater. Of the freshwater, 68.9 percent is in the form of glaciers and snow cover, 30.8 percent is groundwater, and about 0.3 percent is in lakes and rivers.
Water temperature is critical because it is an important quality in environmental parameters. It is important to measure water temperature. By doing so, we can see the characteristics of the water such as the chemical, biological, and physical properties of the water, as well as the possible health effects.