Periodically, water coming out of the tap may seem cloudy or milky in appearance. This is not harmful and is usually caused by dissolved air that is found in our water sources and in our water distribution pipes. Air can also be introduced into your water in the home through aeriators on faucets, filtration systems, or softening systems

The cloudy or milky appearance may be caused by two factors. First, water that is under pressure in the water pipes can contain more air than water that is not under pressure. Water in the pipes is pressurized, which helps to get the water all the way from the water tank 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 oxygen bubbles — similar to a carbonated soft drink. This is not a health risk.  You can let the water sit in an open container until the bubbles naturally disappear. 

The presence of cloudy water coming out of your tap usually lasts for a few days and will go away on its own. To help clear up your cloudy water, fill a pitcher of water and let it stand in the refrigerator overnight. But remember, it is safe to consume the water despite its cloudy appearance and waiting for it to clear is not necessary.