2. My water appears cloudy straight from the tap but becomes clear after sitting in a glass for a few minutes. Why?
This phenomenon is known as “flashing” and occurs because air (Oxygen) is more soluble in cold water. When water from cold outdoor pipes is poured into a glass inside a warm home, the tiny captured air bubbles are quickly released. The air is just flashing out of the cold water.
Return to the Consumer's Guide to Tap Water