This sediment disturbance may cause water to appear cloudy or dirty. Water main repair or construction can also cause this temporary inconvenience. If this condition occurs in your system, allow the cold water tap to run until the water clears. This will occur within five minutes. This condition occurs most often when water is very cold and then warms up while in a building's interior piping.
Cold water can hold more air than warm water.
Therefore, some air comes out of solution as tiny air bubbles when the water warms up. At times the water may be so densely filled with air that the water appears cloudy. An easy way to check the cause of cloudiness is to fill a clear glass with the water, set it on a table and watch. If the cloud rises from bottom to top, it is air escaping as the water warms. If the cloud sinks from the top to the bottom, you may have a sediment problem.