Why does drinking water look cloudy sometimes? (Science Experiment)
Channel: Kids Fun Science
Date: 2019-03-04

Made for teachers and parents
Why does my drinking water look cloudy sometimes?

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Sometimes water coming out of the tap looks cloudy, especially during the winter. The cloudiest is actually tiny air bubbles, kind of like the bubbles in carbonated drinks. 

It usually happens when it is very cold outside, because the solubility of air as water pressure increases and/or water temperature decreases. Cold water holds more air than warm water. In the winter, water travels from the reservoir which is very cold and warms up during its travel to your tap. Some of the air that is present is no longer soluble, and comes out of solution.
Also, water pressure has something to do with it. The water in the pipes is pressurized to a degree (which helps to get the water all the way from the water tower to your home). Water under pressure holds more air than water that is not pressurized. Once the water comes out of your tap, the water is no longer under pressure and the air comes out of solution as bubbles. The best thing to do is let it sit in an open container until the bubbles naturally disappear or take a spoon and lightly tap the side of the glass to pop the bubbles and clears the water faster.