Dan,

From the wonderful web:

Milky or Cloudy Looking Water


Why does the water look milky?

Occasionally your water may look milky or cloudy. Milky looking water is usually the result of very tiny air bubbles in the water. These bubbles are so small (almost invisible to the naked eye) they look like someone poured milk in your water.

Where do the bubbles come from?

Our water has air dissolved in it all the time. Most of the time the air stays dissolved in the water and you can't see it. During the colder months the water temperature drops down into the forties (Fahrenheit). When water gets cold, it can hold more air (oxygen) in solution and becomes supersaturated.

If the cold supersaturated water comes into contact with any obstruction in the plumbing system (such as a valve that is not completely open), it causes turbulence which results in the air coming out of solution and forming tiny bubbles. You don't have the same problem in the summer time because the water does not contain as much air.

Is the Utilities Department doing anything about this?

No. Unfortunately, we cannot control the temperature of the water.

How long will it last?

This problem can last until the water warms back up.

Is it harmful?

No.

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