When a glass of water appears milky, let it sit and observe the cloudiness. If the cloudiness rises to the top, the milkiness is composed of air bubbles. Air bubbles in water do not make the water unsafe. They can be removed by flushing the taps in your home. There are a few possible sources of air in water including air entrapped in repaired pipes, malfunctioning water pumps or more commonly, water temperature changes, as wintertime cools Lake Michigan more air dissolves in the water. Call your Public Works department at 708-352-2992 if the cloudiness persists in your taps or settles to the bottom of a glass of water.